Friday, May 24, 2013

A swarm of shallow (3-6 km depth) earthquakes including several felt ones (magnitudes 2.9-3.5) occurred yesterday and today under the SE flank near Zafferana town. So far, no other unusual signs of activity have been reported, but the swarm could indicate something in the making, and the monitoring agency INGV is certainly following these events closely. [more]

A shallow magnitude 5.7 earthquake occurred Fri, 24 May at 04:58 UTC km WNW of Greenville, California, about 50 km SE of Lassen volcano. Hundreds of aftershocks, some of them felt, have occurred. It is unlikely that the earthquake has any relation with the volcano. The status of Lassen volcano remains therefore at green. [more]

Activity, both internal and external, remains elevated. A constant steam plume can be seen rising on webcams and a steam-gas-ash plume rises up to about 1.5 km above the volcano. The seismic signal shows frequent earthquakes and emission events. ... [more]

The remote volcano in the northern Kuriles is probably in eruption, the latest SVERT report and satellite images suggest. A plume of gas and steam, and possibly some minor amounts ash was seen with the MODIS sensor onboard the NASA Terra satellite this morning. ... [more]

SERNAGEOMIN has raised the alert level to orange. Since May 15, a progressive increase in seismic activity as well emissions of gas and now some ash have been observed. ... [more]

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]

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: ... [more]

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. ... [more]

Wednesday, May 22, 2013

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). ... [more]

Tuesday, May 21, 2013

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. ... [more]