USGS Volcano Hazards Program Volcano Update

AVO update page and observatory web site

Volcanic tremor and small explosions continue to be detected in seismic data indicating that the eruption of lava and minor amounts of ash and steam at Veniaminof Volcano continues. Satellite images obtained over the past 24 hours show elevated surface temperatures at the intracaldera cone. Web camera images from Perryville show a small light-colored plume rising above the intracaldera cone to just above the rim of the caldera to about 8,000 to 10,000 feet above sea level and night time images showed a persistent incandescent glow at the cone.

Activity at Veniaminof Volcano may increase above its current level at any time and more vigorous ash emissions could occur. Sustained periods of volcanic tremor may correspond with continuous ash emission which may not be detected in satellite data, especially if ash plumes remain below 15,000 to 20,000 feet above sea level. Brief bursts of ash emission and small explosions with ash fall limited to areas on the flanks of the volcano are likely to occur while the volcano is at its current level of unrest. A larger explosive episode and associated ash emission is not expected at the current level of unrest; however, this remains a possible outcome of the present eruption.

Update in Common Alerting Protocol (CAP) format