Worldwide Volcano News and Updates:
Thursday, May 23, 2013
A shallow magnitude 3.5 earthquake occurred under the town of Zafferana, about 10 km east of the summit area this afternoon. ...more
 Strombolian eruption from the NE vent (21 May 2013)  Eruption plume from Pavlov on 21 May seen from space (NASA) : Explosive activity at Stromboli is currently at normal to moderately high levels, but the magma column has obviously dropped considerably compared to previous weeks, as there are no longer lava overflows. We observed the volcano during the past days and found a total of 8 active vents in the crater terrace, out of which 4 were showing their typical different strombolian activity: ...moreIn the NW crater area, two adjacient vents often erupted simultaneously. One was ejecting dense jets of incandescent gas, almost no ash and only few incandescent tephra that formed candle-like fountains reaching 100-200 m height, and accompanied by loud jet-engine like noises. The other one erupted silent, dense low ash plumes and glowing material to 50-100 m. Eruptions occurred every 20-30 minutes on average. ... [read more] ... [show less] [less] [ read all]
 Current seismic recording at Nevado del Ruiz (OLL station, INGEOMINAS)  Earthquakes under Ruiz during April - May (INGEOMINAS via Blog Culture Volcan)
Small ash emissions were reported yesterday from the volcano. Seismic activity remains elevated, but reduced compared to the recent earthquake swarms in April and early May.
Eruption plume from Pavlov on 21 May seen from space (NASA)
The eruption at Pavlov continues but seismic and eplosive-effusive eruptive activity have dropped compared to the day before yesterday when an ash plume reached 7,000 m altitude and was visible from space.
Strombolian eruption from the NE vent (21 May 2013)  Jet-like and simultaneous ash-rich eruption from two of the NW vents (21 May 2013)
Explosive activity at Stromboli is currently at normal to moderately high levels, but the magma column has obviously dropped considerably compared to previous weeks, as there are no longer lava overflows. We observed the volcano during the past days and found a total of 8 active vents in the crater terrace, out of which 4 were showing their typical different strombolian activity: ...moreIn the NW crater area, two adjacient vents often erupted simultaneously. One was ejecting dense jets of incandescent gas, almost no ash and only few incandescent tephra that formed candle-like fountains reaching 100-200 m height, and accompanied by loud jet-engine like noises. The other one erupted silent, dense low ash plumes and glowing material to 50-100 m. Eruptions occurred every 20-30 minutes on average. Two vents in the central crater area were constantly glowing and ejecting pulsating steam puffs, but did not erupt. [ less] [ read all]
 Current webcam view of Popocatépetl  Current seismic recording from Popocatépetl
Activity has been showing an increase today. Yesterday, CENPRED reported near-continuous emissions of steam and gas and sometimes ash. Some larger explosions occurred at 12:13 h and at 12:34 h local time yesterday. Both produced an eruption column about 1.3 km high and drifting west. Bright glow and strong steaming are currently visible from the webcam images. ...moreA total of 3 hours of spasmodic tremor of low to medium amplitude were recorded yesterday. In addition there were two volcanotectonic earthquakes, one at 13:09 h of magnitude 2.1 and another at 15:55 h of magnitude 1.8 (local times). [ less]
Activity has remained weak and dominantly explosive. Occasional explosions from the Caliente dome produce ash plumes rising up to about 700 m.
Strombolian activity persists in the Mackenney crater, which is slowly filling with new lava. The activity can be heard from San Francisco de Sales and ejects incandescent bombs to about 40 m height. As the crater continues to fill up, INSIVUMEH thinks that during the coming days or weeks, new lava flows are likely to appear.
Activity has remained stable during the past week. During yesterday, INSIVUMEH recorded 10 weak strombolian-type explosions that generated small ash plumes of up to 600 m height and drifting for 8-10 km before dissipating.
Wednesday, May 22, 2013
 Ash emissions from Turrialba volcano (OVSICORI webcam) : New ash emissions occurred yesterday and produced light ash falls in the outskirts of San José, in the areas of Guadalupe, Tres Ríos, Curridabat, and Ipis (at about 30 km distance). ...moreThe relatively strong ash emissions occurred from about 08:50 until 10h30 local time and were produced from two vents at the volcano. At the moment, it is not yet clear whether some of the ash is from new magma or if it is only pulverized older rock (i.e. the product of phreatic activity). Analysis of ash samples will probably tell this very soon. The volcano has in the recent past occasionally emitted ash, such as last in Jan 2012, but had otherwise only been in a state of strong degassing recently. It is known for high SO2 emissions that damage vegetation around the crater and at nearby plantations. Volcano Activity Summary for 22 May 2013:Currently erupting:Ambrym (Vanuatu): active lava lakes in several craters (updated 2 May 2013) Bagana (Bougainville Island, Papua New Guinea): ash explosions (updated 6 May 2013) Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 6 May 2013) Cleveland (Aleutian Islands, Alaska): continuous small eruptions (updated 6 May 2013) Colima (Western Mexico): frequent explosions from growing lava dome, glowing rockfalls and small pyroclastic flows (updated 25 Apr 2013) Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 2 May 2013) Erebus (Antarctica): active lava lake in summit crater (updated 21 Jan 2012) Erta Ale (Ethiopia): active lava lake in northern pit crater, active hornito with intermittend flow in southern crater (updated 11 Jan 2013) Etna (Sicily, Italy): ash emissions and strombolian activity at New SE crater (updated 27 Apr 2013) Fuego (Guatemala): weak to moderate strombolian activity (updated 16 May 2013) Gamalama (Halmahera): ash eruptions since 17 Sep (updated 17 Sep 2012) Grozny (Iturup Island): fumarolic activity (updated 3 Apr 2013) Heard (Australia, Southern Indian Ocean): possible lava lake in summit crater (updated 2 May 2013) Karkar (Northeast of New Guinea): possible ash eruption on 1 February (updated 15 Mar 2013) Kilauea (Hawai'i): lava lakes in Halemau'uma'u and Pu'u 'O'o, lava flows on coastal flat and weakly active ocean entries (updated 20 Apr 2013) Kizimen (Kamchatka): growing lava dome, lava flow on eastern flank, avalanches (updated 19 May 2013) Lokon-Empung (North Sulawesi, Indonesia): frequent small to moderate ash explosions (updated 6 May 2013) Manam (Papua New Guinea): strombolian explosions, lava flow on southern flank (updated 16 Apr 2013) Nyiragongo (DRCongo): active lava lake in summit crater (updated 20 Apr 2013) Ol Doinyo Lengai (Tanzania): spattering and lava flows of natrocarbonatite lava inside the summit crater (updated 9 Dec 2012) Pacaya (Guatemala): weak strombolian activity from Mackenney crater (updated 16 May 2013) Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 13 May 2013) Pavlov (Alaska Peninsula, USA): lava fountaining, lava flow on NW flank (updated 20 May 2013) Popocatépetl (Central Mexico): strong degassing, ash explosions, growing lava dome (updated 21 May 2013) Rabaul (Tavurvur) (New Britain, Papua New Guinea): ash emissions, small explosions (updated 14 Mar 2013) Sakurajima (Kyushu, Japan): 0-3 weak to moderate vulcanian-style explosions per day, ash clouds up to 2-3 km altitude (updated 17 May 2013) Sangay (Ecuador): no recent explosions reported (updated 27 Apr 2013) Santa María / Santiaguito (Guatemala): advancing viscous active lava flows, weak occasional explosions (updated 16 May 2013) Semeru (East Java, Indonesia): growing lava dome, ash venting and small to moderate explosions (updated 25 Jul 2012) Shiveluch (Kamchatka): slow dome growth, occasional explosions and pyroclastic flows (updated 19 May 2013) Stromboli (Eolian Islands, Italy): continuing lava overflows (updated 20 May 2013) Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013) Tolbachik (Kamchatka): effusion of fluid lava flows (updated 19 May 2013) Yasur (Tanna Island, Vanuatu): strong strombolian activity (level 3), crater currently closed (updated 8 Apr 2013) Eruption warning / minor activity:Bezymianny (Central Kamchatka Depression): slow lava flow extrusion from dome (updated 10 Mar 2013) Chirpoi (Kurile Islands, Russia): thermal anomaly at summit crater, steaming (updated 9 Jan 2013) Copahue (Chile/Argentina): small explosions, steaming, incandescence at summit (updated 12 May 2013) Dieng (Central Java): increased degassing (updated 28 Mar 2013) Galeras (Colombia): sporadic ash emissions (updated 17 May 2013) Gaua (Vanuatu): possible ash eruption on 29 april (updated 29 Apr 2013) Gorely (Southern Kamchatka): strong steaming (updated 10 Mar 2013) Ibu (Halmahera, Indonesia): Thermal anomalies indicate continuing eruption, possible lava dome growth (updated 18 Oct 2012) Karangetang (Siau Island, Sangihe Islands, Indonesia): hot spot visible at the summit (updated 9 Apr 2013) Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 4 Apr 2013) Kirishima (Kyushu): degassing, slightly increased seismic activity (updated 30 Jul 2012) Krakatau (Sunda Strait, Indonesia): occasional explosions (updated 1 Oct 2012) Langila (New Britain, Papua New Guinea): occasional ash explosions (updated 11 Feb 2013) Marapi (Western Sumatra, Indonesia): intermittent mild ash explosions (updated 17 Mar 2013) Mayon (Luzon Island): phreatic explosions (updated 7 May 2013) Medvezhia (Kurile Islands, Russia): strong steaming, thermal anomaly (updated 17 Jan 2013) Nevado del Ruiz (Colombia): earthquake swarm, strong steaming and ash venting (updated 16 May 2013) Nyamuragira (DRCongo): Fort dégazage du cratère sommital (updated 27 Apr 2012) Pagan (Mariana Islands): steaming, thermal anomaly (updated 12 Dec 2012) Papandayan (West Java): strong hydrothermal activity, increased seismicity (updated 6 May 2013) Poas (Costa Rica): Small phreatic explosions on 29 October (updated 1 May 2013) Rasshua (Central Kuriles)Reventador (Ecuador): growing lava dome, lava flows on upper flank, frequent explosions (updated 14 May 2013) Rincón de la Vieja (Costa Rica): small phreatic eruption on 11 April (updated 6 Oct 2012) Sacabaya (Northern Chile, Bolivia and Argentina)Sangeang Api (Indonesia): degassing, increased seismic activity (updated 21 May 2013) Soputan (North Sulawesi, Indonesia): new eruption on 18 (updated 22 Apr 2013) Suwanose-jima (Ryukyu Islands): steaming, occasional weak eruptions, elevated seismicity (updated 23 Feb 2013) Tungurahua (Ecuador): degassing, minor explosions (updated 16 May 2013) Turrialba (Costa Rica): ash venting, strong degassing (updated 22 May 2013) Ulawun (New Britain, Papua New Guinea): ash emissions and rumblings heard (updated 23 Mar 2013) Villarrica (Central Chile): weak deep-seated explosive activity, steaming (updated 20 Jan 2013) Restless / uncertain activity:Aoba (Vanuatu): minor phreatic activity from Lake Vui (updated 8 Feb 2013) Askja (Central Iceland): increased seismicity (updated 27 Mar 2013) Bárdarbunga (Iceland): earthquake swarm (updated 26 Jan 2013) Barren Island (Indian Ocean)Bromo (East Java, Indonesia): seismic unrest, steaming (updated 3 Oct 2012) Campi Flegrei (Phlegrean Fields) (Italy): swarm of small earthquakes related to bradyseismus (updated 6 Feb 2013) Chaitén (Southern Chile and Argentina)Changbaishan (China / North Korea border): increased seismic and degassing activity, deformation (updated 29 Sep 2012) Concepción (Nicaragua): seismic unrest (updated 14 Apr 2013) Cumbal (Colombia): continuing seismic swarms (updated 16 May 2013) El Hierro (Canary Islands, Spain): strong seismic swarm west of the island, inflation (updated 5 Apr 2013) Gamkonora (Halmahera): alert level lowered to yellow (updated 14 Sep 2012) Guntur (West Java)Hakone (Honshu)Hekla (Iceland): strong inflation (updated 30 Apr 2013) Ijen (East Java, Indonesia): increased steaming and seismicity, alert level raised on 24 July (updated 3 Apr 2013) Irazu (Costa Rica)Iwo-jima (Volcano Islands): weak degassing, occasional volcanic tremors (updated 22 Jan 2013) Katla (Southern Iceland): occasional seismic swarms (updated 17 Aug 2012) Kerinci (Sumatra)Ketoi (Kurile Islands, Russia)Kliuchevskoi (Kamchatka): weak seismic activity (updated 19 Mar 2013) Kuchinoerabu-jima (Ryukyu Islands)Kverkfjöll (Eastern Iceland): occasional small earthquake swarms (updated 21 Oct 2012) Laguna del Maule (Central Chile): seismic unrest, deformation (updated 20 Apr 2013) Lascar (Northern Chile): steam plumes with slight ash content (updated 14 Apr 2013) Lewotobi (Flores): steaming and seismic activity decreased, alert lowered back to 1 (out of 4) (updated 5 Apr 2012) Loihi (United States, Hawaiian Islands): Magnitude 4.2 earthquake at Loihi (updated 26 Nov 2012) Machin (Colombia): elevated seismic activity (updated 16 May 2013) Masaya (Nicaragua): elevated seismic activity (updated 17 May 2013) Mauna Loa (Big Island, Hawai'i)Merapi (Central Java): Dome collapse sometime in October (updated 21 Oct 2012) Miyake-shima (Izu Islands)Mt Fuji (Honshu): earthquakes at the end of January and in February 2012, new craters reported, increasing fumarolic activity (updated 4 Feb 2013) Nevado del Huila (Colombia): degassing (updated 16 May 2013) Raung (East Java): mild strombolian eruption inside the crater (updated 6 Apr 2013) Reclus (Southern Chile and Argentina): increased number of earthquakes (updated 31 Aug 2012) Rinjani (Lombok)Ruapehu (North Island): seismic unrest (updated 13 Apr 2013) Sabancaya (Peru): seismic unrest (updated 16 May 2013) San Cristobal (Nicaragua): seismic unrest (updated 17 May 2013) San Miguel (El Salvador): seismic unrest (updated 6 Apr 2013) Sinabung (Sumatra, Indonesia)Siple (Marie Byrd Land, Western Antarctica): possible steaming detected on 20 June (updated 28 Jun 2012) Sirung (Pantar Island, Indonesia ): steaming and elevated seismicity (updated 27 May 2012) Slamet (Central Java): degassing, strong fumaroles (updated 9 Aug 2012) Sotará (Colombia): weak seismic unrest (updated 16 May 2013) Soufriere Hills (Montserrat, West Indies (UK)): seismic unrest, occasional light ash venting (updated 21 Mar 2013) Taal (Luzon, Philippines): degassing, elevated seismic activity (updated 6 Apr 2013) Tahalra Volcanic Field (Algeria): 2 km deep volcanic earthquake on 14 february (updated 17 Feb 2013) Talang (Sumatra)Tambora (Sumbawa): aucune activité ces derniers mois, l'alerte est revenue à la normale (updated 6 Apr 2013) Telica (Nicaragua): seismic unrest, occasional earthquake swarms (updated 17 May 2013) Tiatia (Kunashir Island): weak thermal anomaly (updated 6 Sep 2012) Tjörnes Fracture Zone (North of Iceland): continuing earthquake swarm (updated 8 Apr 2013) To-shima (Izu Islands): seismic swarm (updated 10 Mar 2013) Tongariro (North Island, New Zealand): strong steaming from Te Maari craters, slightly elevated seismic activity (updated 19 Feb 2013) Torfajökull (Iceland): earthquake swarm (updated 17 Feb 2013) [ less] [ read all]
Ash emissions from Turrialba volcano (OVSICORI webcam)
New ash emissions occurred yesterday and produced light ash falls in the outskirts of San José, in the areas of Guadalupe, Tres Ríos, Curridabat, and Ipis (at about 30 km distance). ...moreThe relatively strong ash emissions occurred from about 08:50 until 10h30 local time and were produced from two vents at the volcano. At the moment, it is not yet clear whether some of the ash is from new magma or if it is only pulverized older rock (i.e. the product of phreatic activity). Analysis of ash samples will probably tell this very soon. The volcano has in the recent past occasionally emitted ash, such as last in Jan 2012, but had otherwise only been in a state of strong degassing recently. It is known for high SO2 emissions that damage vegetation around the crater and at nearby plantations. [ less]
Tuesday, May 21, 2013
 Glow from Popocatépetl's summit (CENAPRED webcam) : An increase in seismicity since 26 April triggered VSI to rise the alert status from 2 to 3 on a scale of 1-4 (from "Waspada", "watch" to Siaga", alert). For the moment, only degassing has been observed as surface activity. ...moreA similar increase in seismic activity was observed in Oct 2012, when the alert was raised as well and then reduced again in November. [ less] [ read all]
An increase in seismicity since 26 April triggered VSI to rise the alert status from 2 to 3 on a scale of 1-4 (from "Waspada", "watch" to Siaga", alert). For the moment, only degassing has been observed as surface activity. ...moreA similar increase in seismic activity was observed in Oct 2012, when the alert was raised as well and then reduced again in November. [ less]
Glow from Popocatépetl's summit (CENAPRED webcam)  Current seismic recording from Popocatépetl
Activity has been a bit calmer over the past 2 days, but the number of emissions and small explosions (about 3 per hour) remains elevated. Explosions ejected incandescent fragments to heights of 500 m above the crater. Strong glow is visible at the volcano's summit at night. Intermittent phases of volcanic tremor and volcanic earthquakes of magnitude up to 2.1 have been registered. The volcanic alert level remains at YELLOW Phase 3.
Monday, May 20, 2013
 Thermal image of the crater area of Stromboli (INGV Catania) : Over the past days, Stromboli has returned to normal levels of activity with frequent, mostly small to medium-sized explosions and low to medium tremor. Small lava overflows and frequent rockfalls still occur. ...morePavlov (Alaska Peninsula, USA): The eruption continues with no significant changes. Small lava fountaining, explosions, and the explosive interaction of the lava flow with snow and ice generate a plume of steam, ash, and gas, occasionally reaching up to 22,000 ft. above sea level, and extending primarily southeast from the volcano over the North Pacific Ocean visible in satellite images. [ less] [ read all]
The eruption continues with no significant changes. Small lava fountaining, explosions, and the explosive interaction of the lava flow with snow and ice generate a plume of steam, ash, and gas, occasionally reaching up to 22,000 ft. above sea level, and extending primarily southeast from the volcano over the North Pacific Ocean visible in satellite images. ...moreMinor ash fall is likely occurring on the north, east and southeast flanks of the volcano and possibly on parts of Pavlof Bay and adjacent waters southeast of the volcano. Seismic activity remains elevated with nearly continuous volcanic tremor being recorded on the local seismic network. Although the activity to date has been characterized by relatively low-energy lava fountaining and ash emission, more energetic explosions could occur without warning at any time that could place ash clouds above 20,000 ft. Depending on wind direction, trace to minor amounts of ash may fall on nearby communities, including Sand Point, Nelson Lagoon, King Cove and Cold Bay. (AVO) [ less] [ read all]
Thermal image of the crater area of Stromboli (INGV Catania)
Over the past days, Stromboli has returned to normal levels of activity with frequent, mostly small to medium-sized explosions and low to medium tremor. Small lava overflows and frequent rockfalls still occur.
Sunday, May 19, 2013
 Pavlof volcano eruption column, May 18, 2013. Photo courtesy Theo Chesley. (AVO)  Aerial view of the lava dome in Popo's crater on 18 May (CENAPRED) : The lava dome remains active and produces hot avalanches on the western and eastern flanks. KVERT reports moderate seismic activity, incandescence of the volcano summit and medium to strong degassing. ...moreShiveluch (Kamchatka): The activity of the growing lava dome continues with little changes. KVERT reports moderate seismic activity, moderate gas-steam activity and incandescence. [ less] [ read all]
The lava dome remains active and produces hot avalanches on the western and eastern flanks. KVERT reports moderate seismic activity, incandescence of the volcano summit and medium to strong degassing.
The activity of the growing lava dome continues with little changes. KVERT reports moderate seismic activity, moderate gas-steam activity and incandescence.
According to the latest KVERT report, the eruption has gained again in strength. Tremor levels have risen and lava continues to effuse from the southern fissure vent, feeding a broad lava flow field.
Pavlof volcano eruption column, May 18, 2013. Photo courtesy Theo Chesley. (AVO)
The eruption continues with lava fountaining, an active lava flow and ash emissions, accompanied by continuous seismic tremor. Aerial observations suggest that the interaction of lava and ice on the upper slope of the volcano create mud flows and pyroclastic flows. ...moreA narrow plume of steam, ash, and gas, occasionally up to 20,000 ft. above sea level, and extending southeast from the volcano over the North Pacific Ocean was visible in satellite images yesterday. Minor to trace ash fallout could be occurring on the north, east and southeast flanks of the volcano and possibly on parts of Pavlof Bay and adjacent waters southeast of the volcano. Nearby communities have not reported any ash fall over the past 24 hours. (AVO) [ less]
Aerial view of the lava dome in Popo's crater on 18 May (CENAPRED)
Activity remains elevated, but the number and size of explosions have decreased during the past 2 days. CENAPRED made an overflight and found that the series of recent explosions since 14 May, in particular the two that occurred on the night of the 16th to 17th, have excavated a crater of approx. 200 m diameter and 40 m depth in the lava dome. The rest of the dome's surface is covered by fragments from the explosions.
Friday, May 17, 2013
 MODIS hot spot data (past 7 days) for Pavlov volcano (ModVolc, Univ. Hawaii)  Eruption from Popo this morning (CENAPRED webcam) : It seems that the latest cycle of increased activity has ended: after several days of intense activity, culminating in larger explosions on 14 and 15 May, the volcano has been "taking a rest" lasting about 2 days. This morning, only a small explosion was recorded. ...morePavlov (Alaska Peninsula, USA): The eruption continues with lava fountaining at the summit that feeds a lava flow now over 100 m long and produces a continuous ash, steam, and gas plume extending downwind from the volcano for 50 to 100 km at an altitude of about 20,000 ft above sea level. This morning the cloud was carried to the southeast. Satellite images show persistent elevated surface temperatures at the summit and on the northwest flank. [ less] [ read all]
It seems that the latest cycle of increased activity has ended: after several days of intense activity, culminating in larger explosions on 14 and 15 May, the volcano has been "taking a rest" lasting about 2 days. This morning, only a small explosion was recorded.
 Seismic recording from Masaya 16 May (MASN station, INETER)
Seismic activity has remained at normal, generally low levels during the past weeks. Occasionally, phases of weak increased tremor are visible.
 Current seismic recording from San Cristobal volcano (CRIN station, INETER)
Seismic activity has generally remained weak recently.
 Seismic recording from Telica this morning (TELN station, INETER)  Seismic recording from Telica 15 May (TELN station, INETER)
Seismic activity has returned (for now) to relatively low levels today. This follows many small earthquake swarms that occurred during the past week. [ read all]
 Ash emissions from Galeras on 16 May (INGEOMINAS)
A small series of ash emissions occurred in the morning of 16 May, following a weak increase in seismic activity during the past week.
Eruption from Popo this morning (CENAPRED webcam)
Activity remains intense. Last night at 22:14 and this morning at 00:29 h local time, two strong explosions occurred and ejected incandescent fragments on all the volcano´s flanks to distances of up to 1,500 m from the crater. The explosions triggered an eruption plume rising at least 3 km above the volcano, drifting northeast.
MODIS hot spot data (past 7 days) for Pavlov volcano (ModVolc, Univ. Hawaii)  Current seismic recording from Pavlov volcano (PVV station, AVO)
The eruption continues with lava fountaining at the summit that feeds a lava flow now over 100 m long and produces a continuous ash, steam, and gas plume extending downwind from the volcano for 50 to 100 km at an altitude of about 20,000 ft above sea level. This morning the cloud was carried to the southeast. Satellite images show persistent elevated surface temperatures at the summit and on the northwest flank. ...moreSeismic activity remains elevated with nearly continuous tremor recorded on the seismic network. [ less]
Thursday, May 16, 2013
 View of Pavlof, May 14, 2013. Photo courtesy of pilot Theo Chesley. (AVO)  Moderate explosion at Popocatépetl this morning : The eruption continues. The volcano produces a lava flow on the northwest flank. Interaction of the lava flow and ice, producing debris flows, as well as possible explosions at the vent produce a steam-ash plume rising up to about 20,000 ft. above sea level. ...moreResidents of Cold Bay, located 37 miles southwest of the volcano, observed incandescent glow at the summit during the night. (AVO) [ less] [ read all]
View of Pavlof, May 14, 2013. Photo courtesy of pilot Theo Chesley. (AVO)
The eruption continues. The volcano produces a lava flow on the northwest flank. Interaction of the lava flow and ice, producing debris flows, as well as possible explosions at the vent produce a steam-ash plume rising up to about 20,000 ft. above sea level. ...moreResidents of Cold Bay, located 37 miles southwest of the volcano, observed incandescent glow at the summit during the night. (AVO) [ less]
Moderate explosion at Popocatépetl this morning
Activity remains elevated and ash plumes from frequent explosions of moderate size reach 26,000 ft (8 km) altitude, drifting NE. Ash fall occurred in Paso de Cortés, north of the volcano. ...moreThis morning, many explosions were observed ejecting incandescent material to maximum distances of 400 m mainly on the north and north-east flanks. Several pulses of high frequency tremor of low amplitude accompanied the emissions. [ less] [ read all]
 Current seismic recording at Tungurahua (RETU station, IGPEN)
The volcano has calmed down a bit compared to the previous week, which is also apparent on recent seismograms. No recent explosions or ash falls were reported.
 Current seismic recording from Sabancaya volcano (BHZ station, IGP)
Seismic activity has calmed down a bit compared to the previous weeks.
Only relatively few and weak explosions occurred recently, some of which caused light ash fall in nearby areas. The lava dome is producing a degassing plume most of the time. No reports of activity at the stagnant lava flows.
Explosive activity remains very weak. During the past 24 hour observation interval, INSIVUMEH only counted 3 small explosions.
Strombolian activity has returned or increased and is now ejecting incandescent material to heights of 100 m. Seismic data seem currently not available from INSIVUMEH's website.
The large volcano has remained calm with little variations in activity (degassing, 100-150 small earthquakes / week).
Weak seismic unrest continued over the past weeks. The alert level remains at yellow.
Pasto volcano observatory reports no significant changes and maintains yellow (unrest) alert level. The only sign of activity is continuing slightly elevated seismicity (up to magnitudes 1) at shallow depths (less than 3 km) under La Plazuela crater on the northern flank of the volcanic complex.
Internal / external activity has been low with weak earthquake activity (although at somewhat increasing tendency) and steaming observed. Pasto reports low values of SO2 emissions.
No changes have occurred - the only signs of activity are small earthquakes, mostly related to rock fracturing inside the volcano SE of the main dome. The alert status remains at yellow.
 Seismic recording this morning at Nevado del Ruiz (OLL station, INGEOMINAS)
Seismic (tremor, volcanic-tectonic quakes) and external activity (steaming, occasional weak ash venting) have calmed down a bit over the past days.
Wednesday, May 15, 2013
Relatively strong explosions occurred last night (at 20:21 h local time 14 May) and this morning at 01:46 h (local time). Both eruptions generated columns of steam and ash rising 3 km and the latter explosion ejected incandescent fragments over all the volcano flanks to maximum distances of 1,500 m. ...moreSome episodes of harmonic tremor preceded the explosion at 01:46 h, which was followed by an episode of spasmodic tremor of medium and high amplitudes until 04:40 h. Later, other 30 minutes of this type of tremor of lesser energy were registered. The tremor episode were accompanied by the emission of incandescent fragments to maximum distances of 500 m on the north and northeast flanks. [ less] [ read all]
 Seismic signal from Stromboli this morning (STR8 station, INGV)  Webcam image of Shiveluch (KVERT) showing weak glow and a steam/ash plume rising from the dome : Activity has remained generally elevated and seems to have increased yesterday. Current seismic recordings show strong explosion signals and an increase in tremor. A small lava overflow is currently visible from the NE crater. ...moreShiveluch (Kamchatka): Lava dome growth continues. This morning, an explosion and/or a partial collapse produced a volcanic ash cloud rising to 15,000 ft (4.7 km) altitude this morning by VAAC Tokyo. [ less] [ read all]
Seismic signal from Stromboli this morning (STR8 station, INGV)  Current thermal image of the crater area of Stromboli (INGV)
Activity has remained generally elevated and seems to have increased yesterday. Current seismic recordings show strong explosion signals and an increase in tremor. A small lava overflow is currently visible from the NE crater.
Webcam image of Shiveluch (KVERT) showing weak glow and a steam/ash plume rising from the dome
Lava dome growth continues. This morning, an explosion and/or a partial collapse produced a volcanic ash cloud rising to 15,000 ft (4.7 km) altitude this morning by VAAC Tokyo. ...moreKVERT reports no changes in activity for the other 5 currently active volcanoes in Kamchatka (continuing lava effusion at Tolbachik, dome growth at Kizimen and Bezymianny, intermittent mild explosions at Karymsky, strong degassing at Gorely). [ less]
 Aerial view of the growing lava dome in Popo's crater (CENAPRED)  Current view of Popo from the south
Activity remains elevated as new magma continues to rise to the summit at increased rate. The volcano produces intense steaming and occasional explosions that generate steam and ash plumes up to 3 km height and throw incandescent blocks to distances of 700 m. Phases of moderate continuous tremor and several volcano-tectonic earthquakes up to magnitudes 2 accompany this process. Authorities are starting preparations for evacuations should it further increase. ...moreCENAPRED made an aerial survey flight yesterday morning and observed that the lava dome has grown significantly and is now 350 m in diameter and 50 m thick. After an explosion at 9:56 (local time 14 May), it could be seen that the dome had slightly deflated, although it did not diminish considerably in volume. This event might represent the beginning of the dome´s destruction. [ less] [ read all]
 A new steaming lava flow at Pavlof seen by a airline pilot. Photo taken at around 7 pm, May 13.  A small gas and ash? plume from Pavolf on May 14.
Eruptive activity on 13 May at Pavlof has been confirmed. Pilot images have shown a new spatter fed lava flow extending 500 m down the N flank of the volcano. ...moreSmall steam and ash eruptions were noted from Cold Bay. [ less] [ read all]
Tuesday, May 14, 2013
 MODIS hot spot data (past 2 days) for Pavlov volcano (ModVolc, Univ. Hawaii)  Current seismic recording from Popocatépetl : Explosive activity has picked up again at the volcano. Today alone, several explosions have occurred, two of which of moderately large size with ash plumes reaching 10,000 and 12,000 ft (3 and 3.7 km) altitude. (VAAC Tokyo) ...morePavlov (Alaska Peninsula, USA): Seismic activity has decreased today, but remains elevated. MODIS data confirm a hot spot at the summit, which could suggest a small lava flow there. [ less] [ read all]
MODIS hot spot data (past 2 days) for Pavlov volcano (ModVolc, Univ. Hawaii)  Current seismic recording from Pavlov volcano (PVV station, AVO)
Seismic activity has decreased today, but remains elevated. MODIS data confirm a hot spot at the summit, which could suggest a small lava flow there.
Explosive activity has picked up again at the volcano. Today alone, several explosions have occurred, two of which of moderately large size with ash plumes reaching 10,000 and 12,000 ft (3 and 3.7 km) altitude. (VAAC Tokyo)
IG reported continued moderate activity with occasional (mostly unobserved) small explosions.
IGPEN reports ongoing strombolian activity with lava ejected to 200 m above the crater, continuing emissions of steam and ash and occasional strong explosions with roaring sounds that produce ash columns up to 3 km high. Ashfall was reported overnight 12-13 May in the sector of Manzano.
Current seismic recording from Popocatépetl
Activity has been lower today with lesser earthquakes and intermittent emissions.
Activity has been generally low recently, with infrequent small explosions and occasional small avalanches produced from the weakly active lava flows on the dome's flanks.
Activity seems to have decreased. INSIVUMEH no longer reports and strombolian activity visible or audible.
Activity has remained stable and at relatively low levels over the past days. The volcano has few weak to moderate strombolian-type explosions every now and then (5-10 per day), which produce small ash plumes rising up to 5-700 m above the crater.
 Ground deformation (deflation) at Sabancaya volcano measured by InSAR (IGP)  Location of recent earthquakes (IGP)
The possible ash emissions on 9 May have not been confirmed, but unrest in the form of increased earthquake activity and ground deformation has increased since early May, the Geophysical Institute of Peru (IGP) reported in its press release on 10 May. ...moreSo-called "hybrid" earthquakes (related to both the fracturing of rock and fluid movements) have increased since 2 May, while purely volcanic-tectonic quakes have remained stable. Satellite-born InSAR radar measurements showed that the area of the current seismicity (north-east of the volcano, just above the village of Hornillo), has shown subsidence of about 7 cm, which is possibly related to magma draining from there into different reservoirs. [ less] [ read all]
A new eruption has probably started. AVO raised the alert level to orange, following an increase in seismic activity this morning along with the presence of an intense thermal anomaly at the summit observed in latest satellite imagery. ...moreSimilar patterns of seismicity and elevated surface temperatures have previously signalled the onset of eruptive activity at Pavlof. Although not yet visually confirmed, a low-level eruption of lava has likely begun from a summit vent. No ash clouds have been detected. Source: AVO [ less] [ read all]
Monday, May 13, 2013
 MODIS hot spot data (past 2 days) for Tolbachik volcano (ModVolc, Univ. Hawaii)  Current seismic recording from Popocatépetl : Activity continues with little changes. Video data showed that the lava dome is still active and produces incandescence and hot avalanches on the western and eastern flanks. Strong and moderate gas-steam activity accompany this process. Satellite data showed a thermal anomaly over the volcano. (KVERT) ...moreTolbachik (Kamchatka): Although tremor continues to decrease very slowly, KVERT reports that fluid lava is still being erupted from the vent on the southern fissure. MODIS satellite data still show a large hot spot, confirming that the eruption might be longer lasting than thought. [ less] [ read all]
MODIS hot spot data (past 2 days) for Tolbachik volcano (ModVolc, Univ. Hawaii)
Although tremor continues to decrease very slowly, KVERT reports that fluid lava is still being erupted from the vent on the southern fissure. MODIS satellite data still show a large hot spot, confirming that the eruption might be longer lasting than thought.
Activity continues with little changes. Video data showed that the lava dome is still active and produces incandescence and hot avalanches on the western and eastern flanks. Strong and moderate gas-steam activity accompany this process. Satellite data showed a thermal anomaly over the volcano. (KVERT)
The lava dome continues to be active and produce explosions and small pyroclastic flows from time to time, generating ash plumes rising to 7-10,000 ft such as today.
Current seismic recording from Popocatépetl
Activity at the volcano continues to increase. A relatively long phase of strong volcanic tremor today and high levels of SO2 output suggests that the rise of magma is accelerating. A continuous plume of steam and some ash was observed last night reaching 1 km high, in addition to intermittent explosions. Lava glow at night is now strong.
 Seismic recording this morning at Nevado del Ruiz (OLL station, INGEOMINAS)
A small seismic swarm, likely caused by the rise of another new small batch of magma, occurred this morning at the volcano. The hyopcenters were located 4 km SW of the Arenas crater at depths between 4-6 km, INGEOMINAS reported.
Sunday, May 12, 2013
 Map of earthquakes on the submarine Reykjanes Ridge during 9-10 May  Depth vs time of earthquakes during 9-10 May
An earthquake swarm with hundreds of earthquakes up to magnitudes near 4 occurred between 9-10 May at about 10 km depth on the submarine prolongation of the SW rift zone (Reykjanes Ridge). Likely, it was caused by a shallow magmatic intrusion, but there are no reports suggesting a submarine eruption.
 Current seismic recording from Popocatépetl  Current seismic recording at Tungurahua (RETU station, IGPEN) : The activity continued to increase over the past days and CENAPRED raised the alert level to Yellow Phase 3 this morning. The volcano has been producing frequent sequences of continuous steam and ash emissions as well as discrete vulcanian-type explosions that throw glowing bombs to several hundred meters distance from the crater and create ash plumes up to about 2 km high. ...moreA phase of strong volcanic tremor occurred today and a large SO2 plume visible on NOAA satellite data accompanies increase lava output rate. [ less] [ read all]
SERNAGEOMIN has recently raised the alert back to yellow after new small explosions occurred at the volcano and incandescence was observed at the summit crater. A small but persistent steam-and-ash plume has been rising about 350 m from the volcano. Interestingly, little change in the seismic activity has been noticed with the incandescence and explosions, so it is not clear whether this new activity is caused by fresh magma rising towards the surface.
Current seismic recording at Tungurahua (RETU station, IGPEN)
Seismic and surface activity remain moderate with ash emissions and intermittent strong strombolian to vulcanian explosions which sometimes are accompanied by ground vibration and strong shock waves that rattle windows and doors in nearby areas. ...moreAn explosion on Friday produced and ash plume rising up to 30,000 ft (9 km) elevation. Ash falls have been occurring in areas of Santa Fe de Galán, Mocha, Sabañag, Tisaleo and Quero. [ less]
Possible eruptions have started at the volcano. Pilots reported several volcanic ash plumes from the volcano in the past days although VAAC Buenos Aires could not identify ash on satellite imagery.
Current seismic recording from Popocatépetl  SO2 plume from Popo (NOAA)
The activity continued to increase over the past days and CENAPRED raised the alert level to Yellow Phase 3 this morning. The volcano has been producing frequent sequences of continuous steam and ash emissions as well as discrete vulcanian-type explosions that throw glowing bombs to several hundred meters distance from the crater and create ash plumes up to about 2 km high. ...moreA phase of strong volcanic tremor occurred today and a large SO2 plume visible on NOAA satellite data accompanies increase lava output rate. [ less]
Friday, May 10, 2013
Popocatépetl (Central Mexico): On 9 May, 28 explosions were noted from the volcano, the largest were at 05:16 and 07:01 am. Incandescence was seen at night. Several periods of harmonic tremor were noted in the reporting period. A gas and steam plume drifted SE. ...moreVolcano Activity Summary for 10 May 2013:Currently erupting:Ambrym (Vanuatu): active lava lakes in several craters (updated 2 May 2013) Bagana (Bougainville Island, Papua New Guinea): ash explosions (updated 6 May 2013) Bas Dong Nai (Vietnam)Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 6 May 2013) Cleveland (Aleutian Islands, Alaska): continuous small eruptions (updated 6 May 2013) Colima (Western Mexico): frequent explosions from growing lava dome, glowing rockfalls and small pyroclastic flows (updated 25 Apr 2013) Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 2 May 2013) Erebus (Antarctica): active lava lake in summit crater (updated 21 Jan 2012) Erta Ale (Ethiopia): active lava lake in northern pit crater, active hornito with intermittend flow in southern crater (updated 11 Jan 2013) Etna (Sicily, Italy): ash emissions and strombolian activity at New SE crater (updated 27 Apr 2013) Fuego (Guatemala): weak to moderate strombolian activity (updated 6 May 2013) Gamalama (Halmahera): ash eruptions since 17 Sep (updated 17 Sep 2012) Grozny (Iturup Island): fumarolic activity (updated 3 Apr 2013) Heard (Australia, Southern Indian Ocean): possible lava lake in summit crater (updated 2 May 2013) Karkar (Northeast of New Guinea): possible ash eruption on 1 February (updated 15 Mar 2013) Kilauea (Hawai'i): lava lakes in Halemau'uma'u and Pu'u 'O'o, lava flows on coastal flat and weakly active ocean entries (updated 20 Apr 2013) Kizimen (Kamchatka): growing lava dome, lava flow on eastern flank, avalanches (updated 25 Apr 2013) Lokon-Empung (North Sulawesi, Indonesia): frequent small to moderate ash explosions (updated 6 May 2013) Manam (Papua New Guinea): strombolian explosions, lava flow on southern flank (updated 16 Apr 2013) Nyiragongo (DRCongo): active lava lake in summit crater (updated 20 Apr 2013) Ol Doinyo Lengai (Tanzania): spattering and lava flows of natrocarbonatite lava inside the summit crater (updated 9 Dec 2012) Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 6 May 2013) Popocatépetl (Central Mexico): continuing ash eruptions (updated 10 May 2013) Rabaul (Tavurvur) (New Britain, Papua New Guinea): ash emissions, small explosions (updated 14 Mar 2013) Sakurajima (Kyushu, Japan): 0-3 weak to moderate vulcanian-style explosions per day, ash clouds up to 2-3 km altitude (updated 3 May 2013) Sangay (Ecuador): no recent explosions reported (updated 27 Apr 2013) Santa María / Santiaguito (Guatemala): advancing viscous active lava flows, weak occasional explosions (updated 6 May 2013) Semeru (East Java, Indonesia): growing lava dome, ash venting and small to moderate explosions (updated 25 Jul 2012) Shiveluch (Kamchatka): slow dome growth, occasional explosions and pyroclastic flows (updated 22 Apr 2013) Stromboli (Eolian Islands, Italy): continuing lava overflows (updated 2 May 2013) Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013) Tolbachik (Kamchatka): effusion of fluid lava flows (updated 1 May 2013) Tungurahua (Ecuador): ash emissions, explosions (updated 6 May 2013) Yasur (Tanna Island, Vanuatu): strong strombolian activity (level 3), crater currently closed (updated 8 Apr 2013) Eruption warning / minor activity:Bezymianny (Central Kamchatka Depression): slow lava flow extrusion from dome (updated 10 Mar 2013) Chirpoi (Kurile Islands, Russia): thermal anomaly at summit crater, steaming (updated 9 Jan 2013) Dieng (Central Java): increased degassing (updated 28 Mar 2013) Gaua (Vanuatu): possible ash eruption on 29 april (updated 29 Apr 2013) Gorely (Southern Kamchatka): strong steaming (updated 10 Mar 2013) Ibu (Halmahera, Indonesia): Thermal anomalies indicate continuing eruption, possible lava dome growth (updated 18 Oct 2012) Karangetang (Siau Island, Sangihe Islands, Indonesia): hot spot visible at the summit (updated 9 Apr 2013) Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 4 Apr 2013) Kirishima (Kyushu): degassing, slightly increased seismic activity (updated 30 Jul 2012) Krakatau (Sunda Strait, Indonesia): occasional explosions (updated 1 Oct 2012) Langila (New Britain, Papua New Guinea): occasional ash explosions (updated 11 Feb 2013) Marapi (Western Sumatra, Indonesia): intermittent mild ash explosions (updated 17 Mar 2013) Mayon (Luzon Island): phreatic explosions (updated 7 May 2013) Medvezhia (Kurile Islands, Russia): strong steaming, thermal anomaly (updated 17 Jan 2013) Nevado del Ruiz (Colombia): earthquake swarm, strong steaming and ash venting (updated 6 May 2013) Nyamuragira (DRCongo): Fort dégazage du cratère sommital (updated 27 Apr 2012) Pacaya (Guatemala): weak strombolian activity from Mackenney crater (updated 6 May 2013) Pagan (Mariana Islands): steaming, thermal anomaly (updated 12 Dec 2012) Papandayan (West Java): strong hydrothermal activity, increased seismicity (updated 6 May 2013) Poas (Costa Rica): Small phreatic explosions on 29 October (updated 1 May 2013) Rasshua (Central Kuriles)Reventador (Ecuador): growing lava dome, lava flows on upper flank, frequent explosions (updated 6 May 2013) Rincón de la Vieja (Costa Rica): small phreatic eruption on 11 April (updated 6 Oct 2012) Sacabaya (Northern Chile, Bolivia and Argentina)Soputan (North Sulawesi, Indonesia): new eruption on 18 (updated 22 Apr 2013) Suwanose-jima (Ryukyu Islands): steaming, occasional weak eruptions, elevated seismicity (updated 23 Feb 2013) Turrialba (Costa Rica): vigorous steaming, occasional phreatic explosions (updated 17 Mar 2013) Ulawun (New Britain, Papua New Guinea): ash emissions and rumblings heard (updated 23 Mar 2013) Villarrica (Central Chile): weak deep-seated explosive activity, steaming (updated 20 Jan 2013) Restless / uncertain activity:Aoba (Vanuatu): minor phreatic activity from Lake Vui (updated 8 Feb 2013) Askja (Central Iceland): increased seismicity (updated 27 Mar 2013) Bárdarbunga (Iceland): earthquake swarm (updated 26 Jan 2013) Barren Island (Indian Ocean)Bromo (East Java, Indonesia): seismic unrest, steaming (updated 3 Oct 2012) Campi Flegrei (Phlegrean Fields) (Italy): swarm of small earthquakes related to bradyseismus (updated 6 Feb 2013) Chaitén (Southern Chile and Argentina)Changbaishan (China / North Korea border): increased seismic and degassing activity, deformation (updated 29 Sep 2012) Concepción (Nicaragua): seismic unrest (updated 14 Apr 2013) Cumbal (Colombia): continuing seismic swarms (updated 2 May 2013) El Hierro (Canary Islands, Spain): strong seismic swarm west of the island, inflation (updated 5 Apr 2013) Galeras (Colombia): ash emissions, small explosions (updated 2 May 2013) Gamkonora (Halmahera): alert level lowered to yellow (updated 14 Sep 2012) Guntur (West Java)Hakone (Honshu)Hekla (Iceland): strong inflation (updated 30 Apr 2013) Ijen (East Java, Indonesia): increased steaming and seismicity, alert level raised on 24 July (updated 3 Apr 2013) Irazu (Costa Rica)Iwo-jima (Volcano Islands): weak degassing, occasional volcanic tremors (updated 22 Jan 2013) Katla (Southern Iceland): occasional seismic swarms (updated 17 Aug 2012) Kerinci (Sumatra)Ketoi (Kurile Islands, Russia)Kliuchevskoi (Kamchatka): weak seismic activity (updated 19 Mar 2013) Kuchinoerabu-jima (Ryukyu Islands)Kverkfjöll (Eastern Iceland): occasional small earthquake swarms (updated 21 Oct 2012) Laguna del Maule (Central Chile): seismic unrest, deformation (updated 20 Apr 2013) Lascar (Northern Chile): steam plumes with slight ash content (updated 14 Apr 2013) Lewotobi (Flores): steaming and seismic activity decreased, alert lowered back to 1 (out of 4) (updated 5 Apr 2012) Loihi (United States, Hawaiian Islands): Magnitude 4.2 earthquake at Loihi (updated 26 Nov 2012) Machin (Colombia): elevated seismic activity (updated 14 Apr 2013) Masaya (Nicaragua): elevated seismic activity (updated 23 Apr 2013) Mauna Loa (Big Island, Hawai'i)Merapi (Central Java): Dome collapse sometime in October (updated 21 Oct 2012) Miyake-shima (Izu Islands)Mt Fuji (Honshu): earthquakes at the end of January and in February 2012, new craters reported, increasing fumarolic activity (updated 4 Feb 2013) Nevado del Huila (Colombia): degassing (updated 31 Jan 2013) Raung (East Java): mild strombolian eruption inside the crater (updated 6 Apr 2013) Reclus (Southern Chile and Argentina): increased number of earthquakes (updated 31 Aug 2012) Rinjani (Lombok)Ruapehu (North Island): seismic unrest (updated 13 Apr 2013) Sabancaya (Peru): degassing, earthquake swarm (updated 7 Apr 2013) San Cristobal (Nicaragua): seismic unrest (updated 25 Apr 2013) San Miguel (El Salvador): seismic unrest (updated 6 Apr 2013) Sangeang Api (Indonesia): occasional weak steaming (updated 3 Jan 2013) Sinabung (Sumatra, Indonesia)Siple (Marie Byrd Land, Western Antarctica): possible steaming detected on 20 June (updated 28 Jun 2012) Sirung (Pantar Island, Indonesia ): steaming and elevated seismicity (updated 27 May 2012) Slamet (Central Java): degassing, strong fumaroles (updated 9 Aug 2012) Sotará (Colombia): weak seismic unrest (updated 31 Jan 2013) Soufriere Hills (Montserrat, West Indies (UK)): seismic unrest, occasional light ash venting (updated 21 Mar 2013) Taal (Luzon, Philippines): degassing, elevated seismic activity (updated 6 Apr 2013) Tahalra Volcanic Field (Algeria): 2 km deep volcanic earthquake on 14 february (updated 17 Feb 2013) Talang (Sumatra)Tambora (Sumbawa): aucune activité ces derniers mois, l'alerte est revenue à la normale (updated 6 Apr 2013) Telica (Nicaragua): ongoing seismic swarm (updated 1 May 2013) Tiatia (Kunashir Island): weak thermal anomaly (updated 6 Sep 2012) Tjörnes Fracture Zone (North of Iceland): continuing earthquake swarm (updated 8 Apr 2013) To-shima (Izu Islands): seismic swarm (updated 10 Mar 2013) Tongariro (North Island, New Zealand): strong steaming from Te Maari craters, slightly elevated seismic activity (updated 19 Feb 2013) Torfajökull (Iceland): earthquake swarm (updated 17 Feb 2013) [ less] [ read all]
On 9 May, 28 explosions were noted from the volcano, the largest were at 05:16 and 07:01 am. Incandescence was seen at night. Several periods of harmonic tremor were noted in the reporting period. A gas and steam plume drifted SE.
Wednesday, May 08, 2013
 Explosion from Popocatépetl this night : A significant increase in activity occurred at the volcano. Starting at 19:28 h local time yesterday, volcanic tremor of high amplitude has been recorded for 3.5 hours and accompanied by strong steam and ash emissions creating an eruption column rising 3 km. Explosions ejected incandescent fragments to distances of 700 m from the crater. ...moreThe eruption plume drifted ESE and caused ash fall in areas of the villages of San Juan Tianguismanalco, San Pedro Benito Juárez and the City of Puebla. It is possible that more ash fall will be reported from other villages in the east, south-east (Atlixco) and south (Tochimilco). Volcano Activity Summary for 8 May 2013:Currently erupting:Ambrym (Vanuatu): active lava lakes in several craters (updated 2 May 2013) Bagana (Bougainville Island, Papua New Guinea): ash explosions (updated 6 May 2013) Bas Dong Nai (Vietnam)Batu Tara (Sunda Islands, Indonesia): strombolian explosions, ash plumes up to 500 m, extrusion of a small lava dome with rockfalls (updated 6 May 2013) Cleveland (Aleutian Islands, Alaska): continuous small eruptions (updated 6 May 2013) Colima (Western Mexico): frequent explosions from growing lava dome, glowing rockfalls and small pyroclastic flows (updated 25 Apr 2013) Dukono (Halmahera): thermal anomaly, probably small explosive activity in summit crater (updated 2 May 2013) Erebus (Antarctica): active lava lake in summit crater (updated 21 Jan 2012) Erta Ale (Ethiopia): active lava lake in northern pit crater, active hornito with intermittend flow in southern crater (updated 11 Jan 2013) Etna (Sicily, Italy): ash emissions and strombolian activity at New SE crater (updated 27 Apr 2013) Fuego (Guatemala): weak to moderate strombolian activity (updated 6 May 2013) Gamalama (Halmahera): ash eruptions since 17 Sep (updated 17 Sep 2012) Grozny (Iturup Island): fumarolic activity (updated 3 Apr 2013) Heard (Australia, Southern Indian Ocean): possible lava lake in summit crater (updated 2 May 2013) Karkar (Northeast of New Guinea): possible ash eruption on 1 February (updated 15 Mar 2013) Kilauea (Hawai'i): lava lakes in Halemau'uma'u and Pu'u 'O'o, lava flows on coastal flat and weakly active ocean entries (updated 20 Apr 2013) Kizimen (Kamchatka): growing lava dome, lava flow on eastern flank, avalanches (updated 25 Apr 2013) Lokon-Empung (North Sulawesi, Indonesia): frequent small to moderate ash explosions (updated 6 May 2013) Manam (Papua New Guinea): strombolian explosions, lava flow on southern flank (updated 16 Apr 2013) Nyiragongo (DRCongo): active lava lake in summit crater (updated 20 Apr 2013) Ol Doinyo Lengai (Tanzania): spattering and lava flows of natrocarbonatite lava inside the summit crater (updated 9 Dec 2012) Paluweh (off Flores Island, Indonesia): active growing lava dome (updated 6 May 2013) Popocatépetl (Central Mexico): steam and ash emissions, intermittent explosions (updated 8 May 2013) Rabaul (Tavurvur) (New Britain, Papua New Guinea): ash emissions, small explosions (updated 14 Mar 2013) Sakurajima (Kyushu, Japan): 0-3 weak to moderate vulcanian-style explosions per day, ash clouds up to 2-3 km altitude (updated 3 May 2013) Sangay (Ecuador): no recent explosions reported (updated 27 Apr 2013) Santa María / Santiaguito (Guatemala): advancing viscous active lava flows, weak occasional explosions (updated 6 May 2013) Semeru (East Java, Indonesia): growing lava dome, ash venting and small to moderate explosions (updated 25 Jul 2012) Shiveluch (Kamchatka): slow dome growth, occasional explosions and pyroclastic flows (updated 22 Apr 2013) Stromboli (Eolian Islands, Italy): continuing lava overflows (updated 2 May 2013) Tinakula (Santa Cruz Islands, Solomon Islands): increased activity at the volcano (updated 8 Feb 2013) Tolbachik (Kamchatka): effusion of fluid lava flows (updated 1 May 2013) Tungurahua (Ecuador): ash emissions, explosions (updated 6 May 2013) Yasur (Tanna Island, Vanuatu): strong strombolian activity (level 3), crater currently closed (updated 8 Apr 2013) Eruption warning / minor activity:Bezymianny (Central Kamchatka Depression): slow lava flow extrusion from dome (updated 10 Mar 2013) Chirpoi (Kurile Islands, Russia): thermal anomaly at summit crater, steaming (updated 9 Jan 2013) Dieng (Central Java): increased degassing (updated 28 Mar 2013) Gaua (Vanuatu): possible ash eruption on 29 april (updated 29 Apr 2013) Gorely (Southern Kamchatka): strong steaming (updated 10 Mar 2013) Ibu (Halmahera, Indonesia): Thermal anomalies indicate continuing eruption, possible lava dome growth (updated 18 Oct 2012) Karangetang (Siau Island, Sangihe Islands, Indonesia): hot spot visible at the summit (updated 9 Apr 2013) Karymsky (Kamchatka): occasional small explosions, thermal anomaly (updated 4 Apr 2013) Kirishima (Kyushu): degassing, slightly increased seismic activity (updated 30 Jul 2012) Krakatau (Sunda Strait, Indonesia): occasional explosions (updated 1 Oct 2012) Langila (New Britain, Papua New Guinea): occasional ash explosions (updated 11 Feb 2013) Marapi (Western Sumatra, Indonesia): intermittent mild ash explosions (updated 17 Mar 2013) Mayon (Luzon Island): phreatic explosions (updated 7 May 2013) Medvezhia (Kurile Islands, Russia): strong steaming, thermal anomaly (updated 17 Jan 2013) Nevado del Ruiz (Colombia): earthquake swarm, strong steaming and ash venting (updated 6 May 2013) Nyamuragira (DRCongo): Fort dégazage du cratère sommital (updated 27 Apr 2012) Pacaya (Guatemala): weak strombolian activity from Mackenney crater (updated 6 May 2013) Pagan (Mariana Islands): steaming, thermal anomaly (updated 12 Dec 2012) Papandayan (West Java): strong hydrothermal activity, increased seismicity (updated 6 May 2013) Poas (Costa Rica): Small phreatic explosions on 29 October (updated 1 May 2013) Rasshua (Central Kuriles)Reventador (Ecuador): growing lava dome, lava flows on upper flank, frequent explosions (updated 6 May 2013) Rincón de la Vieja (Costa Rica): small phreatic eruption on 11 April (updated 6 Oct 2012) Sacabaya (Northern Chile, Bolivia and Argentina)Soputan (North Sulawesi, Indonesia): new eruption on 18 (updated 22 Apr 2013) Suwanose-jima (Ryukyu Islands): steaming, occasional weak eruptions, elevated seismicity (updated 23 Feb 2013) Turrialba (Costa Rica): vigorous steaming, occasional phreatic explosions (updated 17 Mar 2013) Ulawun (New Britain, Papua New Guinea): ash emissions and rumblings heard (updated 23 Mar 2013) Villarrica (Central Chile): weak deep-seated explosive activity, steaming (updated 20 Jan 2013) Restless / uncertain activity:Aoba (Vanuatu): minor phreatic activity from Lake Vui (updated 8 Feb 2013) Askja (Central Iceland): increased seismicity (updated 27 Mar 2013) Bárdarbunga (Iceland): earthquake swarm (updated 26 Jan 2013) Barren Island (Indian Ocean)Bromo (East Java, Indonesia): seismic unrest, steaming (updated 3 Oct 2012) Campi Flegrei (Phlegrean Fields) (Italy): swarm of small earthquakes related to bradyseismus (updated 6 Feb 2013) Chaitén (Southern Chile and Argentina)Changbaishan (China / North Korea border): increased seismic and degassing activity, deformation (updated 29 Sep 2012) Concepción (Nicaragua): seismic unrest (updated 14 Apr 2013) Cumbal (Colombia): continuing seismic swarms (updated 2 May 2013) El Hierro (Canary Islands, Spain): strong seismic swarm west of the island, inflation (updated 5 Apr 2013) Galeras (Colombia): ash emissions, small explosions (updated 2 May 2013) Gamkonora (Halmahera): alert level lowered to yellow (updated 14 Sep 2012) Guntur (West Java)Hakone (Honshu)Hekla (Iceland): strong inflation (updated 30 Apr 2013) Ijen (East Java, Indonesia): increased steaming and seismicity, alert level raised on 24 July (updated 3 Apr 2013) Irazu (Costa Rica)Iwo-jima (Volcano Islands): weak degassing, occasional volcanic tremors (updated 22 Jan 2013) Katla (Southern Iceland): occasional seismic swarms (updated 17 Aug 2012) Kerinci (Sumatra)Ketoi (Kurile Islands, Russia)Kliuchevskoi (Kamchatka): weak seismic activity (updated 19 Mar 2013) Kuchinoerabu-jima (Ryukyu Islands)Kverkfjöll (Eastern Iceland): occasional small earthquake swarms (updated 21 Oct 2012) Laguna del Maule (Central Chile): seismic unrest, deformation (updated 20 Apr 2013) Lascar (Northern Chile): steam plumes with slight ash content (updated 14 Apr 2013) Lewotobi (Flores): steaming and seismic activity decreased, alert lowered back to 1 (out of 4) (updated 5 Apr 2012) Loihi (United States, Hawaiian Islands): Magnitude 4.2 earthquake at Loihi (updated 26 Nov 2012) Machin (Colombia): elevated seismic activity (updated 14 Apr 2013) Masaya (Nicaragua): elevated seismic activity (updated 23 Apr 2013) Mauna Loa (Big Island, Hawai'i)Merapi (Central Java): Dome collapse sometime in October (updated 21 Oct 2012) Miyake-shima (Izu Islands)Mt Fuji (Honshu): earthquakes at the end of January and in February 2012, new craters reported, increasing fumarolic activity (updated 4 Feb 2013) Nevado del Huila (Colombia): degassing (updated 31 Jan 2013) Raung (East Java): mild strombolian eruption inside the crater (updated 6 Apr 2013) Reclus (Southern Chile and Argentina): increased number of earthquakes (updated 31 Aug 2012) Rinjani (Lombok)Ruapehu (North Island): seismic unrest (updated 13 Apr 2013) Sabancaya (Peru): degassing, earthquake swarm (updated 7 Apr 2013) San Cristobal (Nicaragua): seismic unrest (updated 25 Apr 2013) San Miguel (El Salvador): seismic unrest (updated 6 Apr 2013) Sangeang Api (Indonesia): occasional weak steaming (updated 3 Jan 2013) Sinabung (Sumatra, Indonesia)Siple (Marie Byrd Land, Western Antarctica): possible steaming detected on 20 June (updated 28 Jun 2012) Sirung (Pantar Island, Indonesia ): steaming and elevated seismicity (updated 27 May 2012) Slamet (Central Java): degassing, strong fumaroles (updated 9 Aug 2012) Sotará (Colombia): weak seismic unrest (updated 31 Jan 2013) Soufriere Hills (Montserrat, West Indies (UK)): seismic unrest, occasional light ash venting (updated 21 Mar 2013) Taal (Luzon, Philippines): degassing, elevated seismic activity (updated 6 Apr 2013) Tahalra Volcanic Field (Algeria): 2 km deep volcanic earthquake on 14 february (updated 17 Feb 2013) Talang (Sumatra)Tambora (Sumbawa): aucune activité ces derniers mois, l'alerte est revenue à la normale (updated 6 Apr 2013) Telica (Nicaragua): ongoing seismic swarm (updated 1 May 2013) Tiatia (Kunashir Island): weak thermal anomaly (updated 6 Sep 2012) Tjörnes Fracture Zone (North of Iceland): continuing earthquake swarm (updated 8 Apr 2013) To-shima (Izu Islands): seismic swarm (updated 10 Mar 2013) Tongariro (North Island, New Zealand): strong steaming from Te Maari craters, slightly elevated seismic activity (updated 19 Feb 2013) Torfajökull (Iceland): earthquake swarm (updated 17 Feb 2013) [ less] [ read all]
Explosion from Popocatépetl this night  Current seismic recording from Popo
A significant increase in activity occurred at the volcano. Starting at 19:28 h local time yesterday, volcanic tremor of high amplitude has been recorded for 3.5 hours and accompanied by strong steam and ash emissions creating an eruption column rising 3 km. Explosions ejected incandescent fragments to distances of 700 m from the crater. ...moreThe eruption plume drifted ESE and caused ash fall in areas of the villages of San Juan Tianguismanalco, San Pedro Benito Juárez and the City of Puebla. It is possible that more ash fall will be reported from other villages in the east, south-east (Atlixco) and south (Tochimilco). [ less]
 Bulletin of World Volcanism April 2013 - cover  Volcano Express April 2013 - cover
The Bulletin of World Volcanism April 2013 is out ( download). ...moreIt contains a reviewed summary of volcano activity during the past month, plus the new Volcano Express section with interesting articles on Machin and Chaiten volcanoes and a review of the pubvolc website. [ less] [ read all]
Tuesday, May 07, 2013
Mayon (Luzon Island): A sudden (probably phreatic) powerful eruption from the summit crater occurred this morning and killed at least 5 people in camp #2 and wounded 15 others. ...moreThe victims, many foreigners, were part of an organized group of climbers. They were surprised by the explosion that showered the camp area with ballistic blocks that hit them. ... [read more] ... [show less] [less] [ read all]
A sudden (probably phreatic) powerful eruption from the summit crater occurred this morning and killed at least 5 people in camp #2 and wounded 15 others. ...moreThe victims, many foreigners, were part of an organized group of climbers. They were surprised by the explosion that showered the camp area with ballistic blocks that hit them. The eruption itself produced a large ash-plume rising several hundred meters before dispersing. [ less] [ read all]
Monday, May 06, 2013
 MODIS hot spot data for Paluweh island, showing the hot pyroclastic deposits S, E and W of the dome (MODIS, Univ. Hawaii)  Eruption plume from Cleveland yesterday (AVO / USGS) : Eruptions have intensified at the volcano. Over the past 2 days, several explosions produced ash plumes rising to about 7,000 ft (2.1 km) altitude and drifting 30-45 nautical miles to the W and NW (VAAC Darwin). ...more [ read all]
Increased seismic activity was detected at the volcano and VSI raised the alert level to 3 out of 4 ("Siaga", "warning") yesterday. ...moreSudden phreatic explosions could occur with little warning at the volcano and present a significant hazard to visitors to the crater, which is a popular tourist site due to its varied, intense hydrothermal activity and colorful active fumaroles. [ less]
Another explosion occurred yesterday evening. It was heard in up to 6 km distance and incandescent bombs were ejected to 200 m distance from the Tompaluan crater. ...moreThe eruption was preceded by an increase in seismic activity starting Saturday night, the local volcano observatory reported. An exclusion zone of 2.5 km radius from the volcano remains in place. [ less] [ read all]
 Seismic recording this morning at Nevado del Ruiz (OLL station, INGEOMINAS)
After a short pause, a new seismic swarm, possibly indicating yet another pulse of magma intrusion, started yesterday at the volcano. The largest quake was a magnitude 2.9 event at 19:28 local time at 5.4 km depth beneath the Arenas crater. It was felt around the volcano.
Eruption plume from Cleveland yesterday (AVO / USGS)
After the initial explosion 2 days ago, continuous small eruptions produced a steam and ash plume yesterday and decreased in intensity again today. The activity of the volcano, which is not monitored on ground, was detected by satellite data and infrasonic tremor measured by ground-coupled airwaves on the nearby Okmok seismic network, 120 km (80 mi) to the northeast. ...moreA faint plume extended eastward below 15,000 ft. Satellite data also continue to show highly elevated surface temperatures at the summit. Sudden explosions of blocks and ash are possible with little or no warning. Ash clouds, if produced, could exceed 20,000 feet above sea level. [ less] [ read all]
 MODIS hot spot data (past 2 days) for Reventador volcano (ModVolc, Univ. Hawaii)
Activity has remained moderate with occasional explosions and possibly the emplacement of a hot avalanche or lava flow on the eastern flank, where a new hot spot on the latest MODIS satellite data can be seen, in addition to the summit where a lava dome is active.
No changes occurred in the volcano's slow effusive/explosive activity. Emissions of steam and gas, with minor ash contents, have been at rates of less than 1 per hour during the previous days, but continuing lava glow can be seen from the summit.
 SO2 plume from Tungurahua volcano yesterday (NOAA)
A gradual increase in eruptive activity is evident. Near continuous ash and steam emissions are interrupted by cannon-like explosions that produce ash plumes rising up to 2-3 km height and produce light ash falls in the areas around the volcano. At night, strombolian activity can be seen from the summit. ...moreA significant SO2 plume can be seen on satellite data drifting to the NW. [ less]
 Current seismic recording at Pacaya (PCG station, INSIVUMEH)
Weak strombolian activity probably continues. It can not always be observed, but only heard and shows on the seismic recording.
The lava dome has remained relatively calm recently with few and mostly weak explosions every now and then, and little activity from the blocky lava flows on the flanks of the Caliente dome.
MODIS hot spot data for Paluweh island, showing the hot pyroclastic deposits S, E and W of the dome (MODIS, Univ. Hawaii)
The lava dome remains relatively active and produces frequent explosions and/or hot rock avalanches. Hot deposits from these can be seen on MODIS satellite data on the eastern, southern and western flank of the dome. Several ash plumes rising to altitudes of about 7,000 ft (2.1 km) were detected in the past days.
An explosion produced an ash plume rising to 7,000 ft (2.1 km) altitude today.
Eruptions have intensified at the volcano. Over the past 2 days, several explosions produced ash plumes rising to about 7,000 ft (2.1 km) altitude and drifting 30-45 nautical miles to the W and NW (VAAC Darwin).
Activity remained at low level, characterized by few (6 during yesterday) strombolian-type explosions that produce gray ash plumes rising 300-500 m above the crater.
Saturday, May 04, 2013
Cleveland (Aleutian Islands, Alaska): A possible explosion occurred this morning at the volcano at 5:00AM AKDT (13:00 UTC) by AVO infrasound recorders. The infrasound signals suggest that this was a relatively short duration, low-level explosion. No eruption cloud has been detected in available satellite views. AVO received no other reports of activity. (USGS / AVO) ...more
A possible explosion occurred this morning at the volcano at 5:00AM AKDT (13:00 UTC) by AVO infrasound recorders. The infrasound signals suggest that this was a relatively short duration, low-level explosion. No eruption cloud has been detected in available satellite views. AVO received no other reports of activity. (USGS / AVO)
Friday, May 03, 2013
 SO2 plume from Popocatépetl yesterday (NOAA)  Seismic signal from Ruiz this morning (OLL station, INGEOMINAS) : Since 1 May, activity has been increasing again from relatively low levels during the weeks before. Over the past 3 days, several explosions have produced ash plumes rising to 10,000 ft (3 km) altitude and on most days, there have been 3-4 daily explosions (for Sakurajima, this is a large number). ...morePopocatépetl (Central Mexico): Some small earthquake swarms have occurred at the volcano in the past days, probably associated with some batches of fresh magma intruding into the system at shallow depth. [ less] [ read all]
Since 1 May, activity has been increasing again from relatively low levels during the weeks before. Over the past 3 days, several explosions have produced ash plumes rising to 10,000 ft (3 km) altitude and on most days, there have been 3-4 daily explosions (for Sakurajima, this is a large number).
 Current seismic signal from RETU station (IG)
Eruptive activity has not changed much. The volcano observatory reported ongoing steam and ash emissions producing a plume oscillating between 1.5-3 km height above the crater and drifting into westerly directions, and occasional small to moderate explosions. Light ash fall occurred in Cevallos and Mocha. Incandescence was visible at the summit.
Activity has further decreased with very few explosions reported since yesterday, and no activity at the lava flows. ...moreAlso, Santiaguito has been rather calm today, and no direct observations could be made at Pacaya. [ less]
Seismic signal from Ruiz this morning (OLL station, INGEOMINAS)
Seismic activity is still elevated, but has been decreasing today, possibly meaning that the most recent magma intrusion is coming to an end (with no eruption).
SO2 plume from Popocatépetl yesterday (NOAA)  Current seismic signal from Popocatépetl
Some small earthquake swarms have occurred at the volcano in the past days, probably associated with some batches of fresh magma intruding into the system at shallow depth. ...moreThis resulted in increased degassing, visible as a significant SO2 plume on NOAA satellite data. Surface activity, however, has remained low with very few emissions and only faint glow at the summit. [ less]
A phreatic explosion occurred from the crater lake on 1 May.
Thursday, May 02, 2013
 Thermal webcam image of the crater area of Stromboli (INGV)  Tremor signal (ESLN station, INGV) : Lava continues to intermittently flow over and out of vents at the rim and the base of the NE crater. Yesterday, the active flow front had reached about half way down the Sciara, local guides reported. ...moreToday, tremor has decreased again a bit, but overflows remain active at least in the upper parts of the slope. Relatively large explosions and near-constant rockfalls on the Sciara continue during the whole time. [ less] [ read all]
 This morning's seismic signal from Tungurahua (RETU station, IG)
Activity remains at moderate levels. Steam andash emissions produce plumes rising about 2 km from the crater, and occasional stronger explosions with cannon-shot noises can be heard (rarely seen) ejecting blocks that fall onto the outer upper slopes and tumble downhill. ...moreContinuous volcanic tremor can be seen on the seismic recordings. [ less]
Last night, emissions of steam and some ash produced a column rising bout 1 km above the crater.
Pasto observatory reported an increase in seismic activity during the past week, with many small volcanic-tectonic quakes u to magnitudes of 2.6 at varying depths of up to 20 km underneath of La Plazuela crater on the northern sector of the volcanic complex.
Activity (seismic and at the surface) has recently calmed down at the volcano.
 SO2 plume from Bagana today (NOAA)
Heightened activity continues at Bagana. The latest NOAA satellite data reveal a significant plume of SO2 from the volcano.
 SO2 plume from Dukono (NOAA)
An unusually large SO2 plume from Dukono suggests the volcano, in semi-permanent strombolian-type eruption for many years, is currently in a phase of elevated activity.
 SO2 from Ambrym today (NOAA)
A SO2 plume is howering over Ambrym island, suggesting that the lava lakes continue to be active. Our next group going there next week will hopefully be able to confirm this by direct observation.
 Seismic signal from Ruiz this morning (OLL station, INGEOMINAS)
More earthquakes have occurred at shallow depth beneath the volcano, including a magnitude 2.6 quake yesterday noon (local time) at 5 km NE beneath the Arenas crater, as well as some larger events later at night (no updates from Manizales observatory yet, though). The seismic swarm continues.
Activity has remained low, with only about 1 weak emission of mainly steam per hour. Glow at the summit continues to be seen at night.
 NASA Earth Observatory image of Hear Island on 20 April 2013 by Jesse Allen and Robert Simmon
Effusive eruptive activity at the remote volcano continues. A recent satellite picture shows a new lava flow on the SW flank of Mawson Peak. A MODIS hot spot is visible as well. ...moreStarting in October 2012, satellites measured subtle signals that suggested volcanic activity on remote Heard Island. The recent satellite images (NASA Earth Observatory) have now provided proof of an eruption otherwise likely undetected. By April 7, 2013, Mawson’s steep-walled summit crater had filled, and a trickle of lava had spilled down the volcano’s southwestern flank. On April 20 the lava flow remained visible, and had even widened slightly just below the summit. [ less] [ read all]
Activity has decreased - the lava flows stopped being alimented yesterday and the explosive activity has become weaker. Different from previous eruptive phases, this time, it did not culminate in a paroxysmal eruption.
Thermal webcam image of the crater area of Stromboli (INGV)  Webcam image of the crater area of Stromboli (INGV)
Lava continues to intermittently flow over and out of vents at the rim and the base of the NE crater. Yesterday, the active flow front had reached about half way down the Sciara, local guides reported. ...moreToday, tremor has decreased again a bit, but overflows remain active at least in the upper parts of the slope. Relatively large explosions and near-constant rockfalls on the Sciara continue during the whole time. [ less] [ read all]
Wednesday, May 01, 2013
 Lava overflow on the Sciara del Fuoco (INGV thermal webcam)  Current seismogram from Telica volcano (TELN station INETER) : After decreasing a bit yesterday, the overflow of lava from the NE vents has gained in strength this morning again, accompanied by constant rockfalls, relatively strong explosions and higher tremor. ...moreTolbachik (Kamchatka): KVER reports no change in the ongoing eruption of the volcano and ongoing high tremor values at levels similar to the past weeks. Recent field reports however suggest that the eruption continues its slowly declining trend and might actually be ending soon. [ less] [ read all]
KVER reports no change in the ongoing eruption of the volcano and ongoing high tremor values at levels similar to the past weeks. Recent field reports however suggest that the eruption continues its slowly declining trend and might actually be ending soon. ...moreA group who visited the volcano on 29 April could not see lava flows or explosions at the active cone on the southern fissure. It was even possible to walk on the now cooling lava flows. However, weak incandescence and a MODIS hot spot remain visible. It is likely that the still elevated tremor signal indicates that the magma continues to be fed into lava tubes and emerges in places that are difficult to see or access. Although it would not come at all as a surprise if the eruption ends, after almost half a year, it is certainly still too early to announce its end right now. [ less]
Current seismogram from Telica volcano (TELN station INETER)
Seismic activity has declined and is now again near normal levels (which include frequent earthquakes typical for Telica volcano's behavior).
 Current seismic recording from Nevado del Ruiz (OLL station, INGEOMINAS)  Last night's seismic recording from Nevado del Ruiz (OLL station, INGEOMINAS)
A shallow (5 km depth) earthquake of magnitude 3.8 occurred yesterday at 10:24 local time north of the Arenas crater and has been followed by an ongoing earthquake swarm. ...moreThe quake was felt in nearby areas including Manizales and Villamaria. Possibly, this could mean a new magmatic intrusion, but so far no reports of increased surface activity have become known. [ less] [ read all]
Activity remains moderate with frequent small explosions detected on seismic signals and strong degassing producing a plume that was observed yesterday rising 800 m.
 Seismic signal from RETU station (IG)
Ash emissions and explosions of moderate size have continued and generated a plume averaging 1-2 km in height above the crater. During the night, incandescence is visible at the summit. Some of the stronger explosions are accompanied by cannon-shot noises.
 Yesterday's signal from Poás volcano
A small earthquake swarm occurred yesterday, probably caused by fluid movements bringing heat into the crater lake. Seismicity has calmed down today again.
Lava overflow on the Sciara del Fuoco (INGV thermal webcam)  Visual webcam image of the crater area (INGV)
After decreasing a bit yesterday, the overflow of lava from the NE vents has gained in strength this morning again, accompanied by constant rockfalls, relatively strong explosions and higher tremor.
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