Volcanic activity worldwide 19 Oct 2013: Klyuchevskoy, Tungurahua
Saturday Oct 19, 2013 17:03 PM |
The large ash plume from Klyuchevskoy drifting east over Kamchatka this morning (Terra satellite image)
Klyuchevskoy (Kamchatka): Strong explosive and effusive activity continues. KVERT monitors the situation closely and issues alerts every few hours. Last evening, ash emissions again reached almost 30,000 ft (8-9 km) altitude. "The ash plume this morning has decreased in height to 21,300-24,600 ft (6.5-7 km) a.s.l. but by now, an ash plume dangerous for aviation is extending about 736 mi (1188 km) to the south-east and east of the volcano (satellite data at 0135 UTC on October 19, 2013)." Video of last night's impressive activity with lava fountains and lava flows all over the flanks of the volcano:
Small pyroclastic flow on the upper slope on 15 Oct (image: Pat. Mothes, IGPEN)
Stronger explosions can occur any time.
Tungurahua (Ecuador): The eruptive phase that had started on 6 Oct, after a quiet interval of 3 months, continues to increase. The volcano observatory reports ash columns rising up to 3 km above the crater and the first occurrence (so far) small pyroclastic flows.
In the early days of this phase, seismic activity was characterized by an increase in the number and energy of the events related to the mobilization of fluids into the volcano such as long-period events, tremor and explosions and emission signals of variable magnitude. Superficially, low intensity strombolian activity and ash emissions could be observed, resulting in ash fall in the areas of El Manzano, Bilbao, Chacauco , Choglontús , Mocha, Pillate and on the upper slopes of the volcano itself.
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Klyuchevskoy (Kamchatka): VAAC Anchorage sent out a message shortly before midnight (UTC) that the "eruption has ended" based on the absence of ash emissions from satellite imagery and pilot observations. This followed a particularly strong explosive phase that apparently occurred last night, when seismic data suggested strong emissions and an ash plume rose to possibly 33,000 ft (10 km) altitude. Webcam images from last night showed strong glow from lava flows and summit activity, but today the volcano has been hidden in clouds and no direct views have been possible so far. ... [more]
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Tuesday, Oct 15, 2013
Klyuchevskoy (Kamchatka): KVERT reported a small decrease in activity, although it seems during the past hours (after the report) to have increased again (see video below). The activity in any case can be considered high. An ash plume rises to up to 26,200 ft (8 km) a.s.l. and extends to the east-north-east of the volcano. ... [more]
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Reykjanes (Reykjanes peninsula (SW Iceland)): (13 Oct) A shallow (10 km) magnitude 4.8 earthquake with many pre- and aftershocks (or a seismic swarm) occurred this morning (Sun) at 07:34 UTC at the SW tip of the Reykjanes peninsula, on the SW active rift zone. The swarm of earthquakes included several quakes of magnitude 3 and higher. The strongest earthquake was widely felt in SE Iceland. ... [more]