Volcanos

Roundup of Global Volcanic Activity:

Stromboli (Eolian Islands, Italy): Activity has generally decreased over the past days, with less tremor and weaker explosion signals. Today, tremor seems to be stronger again.

Etna (Sicily, Italy): Vigorous eruptive activity has started at the Bocca Nuova crater and produced a short phase of violent strombolian activity.

Santorini (Cyclades, Greece): According to the latest seismic and satellite data, the uplift at the Santorini volcano (2011-2012) has has come to an end.

Tjörnes Fracture Zone (North of Iceland): Earthquakes continue with typically 10-20 quakes recorded in the TFZ. The swarm that had started 20 Oct last year has now been going on for over 3 months and shows no signs of stopping.

Tolbachik (Kamchatka): (30 Jan) The eruption continues unchanged.

Taal (Luzon, Philippines): Elevated seismic activity continues. During yesterday-today, PHILVOLCS detected 13 volcanic earthquakes. Two of these events, which occurred at 7:03 and 7:04 PM yesterday, were felt at intensity II and accompanied by rumbling sound as reported by residents of Barangay Calauit located at the southeast sector of the volcano island.

Tongariro (North Island, New Zealand): Some small earthquakes have appeared again today, but generally, seismic activity has been showing a decreasing trend over the past weeks.

White Island (New Zealand): (30 Jan) Activity remains elevated and fluctuates between stronger and weaker phases. In its latest bulletin, GNS reports that the hot lake has dried out and a small tuff cone has started to form on the former floor of the lake: The active vent continues to produce vigorous bursts of mud, rock, steam and gas from 50-100 m high. Ash is not being carried into the plume. This activity is intermittent as is the seismic activity. Current activity is not sufficient for Volcanic Alert Level 2.

Santa María / Santiaguito (Guatemala): Activity today remained low. Only few and very weak explosions and small block avalanches from the active flows were reported by INSIVUMEH.

Fuego (Guatemala): Explosions have been becoming more frequent (now 12 during the past day vs a previous average of only 5). They produce light gray ash plumes drifting south and SE for about 5 km. The lava flow is still weakly active, but was only 150 m long this morning.

San Cristobal (Nicaragua): (30 Jan) Numerous tiny volcanic earthquakes and weak volcanic tremor reflect internal unrest.

Masaya (Nicaragua): (30 Jan) Seismic activity remains at more or less stable levels, showing normal background activity of continuous internal fluid movements.

Copahue (Chile/Argentina border): (30 Jan) Seismic and degassing activity is on the increase, Sernageomin reported in its latest bulletin (29 Jan). During 28-29 Jan, a total of 345 volcanic earthquakes (plus more than 400 not counted ones because below threshold) and 6 hours of volcanic tremor were recorded. The seismic swarm was accompanied by an increase in the degassing activity, creating a column of 500 m during pulses of more intense activity. No glow or ash emissions were seen.

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