Veniaminof Activity - Color Code YELLOW : Alert Level ADVISORY

Seismicity at Veniaminof remains elevated. In the past 24 hours AVO has observed small earthquakes and volcanic tremor located near the intra-caldera cone. These signals are seen across the entire seismic network. No unusual activity was observed through cloudy satellite views.




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Seismic activity began to increase significantly above normal background levels on the morning of May 6 at Veniaminof Volcano. This increase caused AVO to raise the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY on the afternoon of May 7. Seismicity continues at an elevated rate with numerous small magnitude earthquakes being registered across the entire seismic network. Visual observations from residents of Perryville over the past several days indicate no change in the typical steaming from the summit caldera cone that has been the site of activity over recent years. Satellite images show no evidence of increased heat flow or ash emissions.

Given the elevated seismicity, it is possible that low-level ash emissions could occur with little or no additional warning. Ash emissions from typical eruptions of Veniaminof are relatively minor, and usually do not rise much higher than 15,000 ft above sea level. These ash plumes can extend for tens of miles and could be hazardous to aircraft in the vicinity of the volcano. Ash fall is typically confined to the summit caldera and the upper flanks of the volcano.




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Over the past day, earthquake activity has increased at Mount Veniaminof volcano. This increase is a significant change from normal background activity and AVO is increasing the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.

Visual reports today from Perryville indicate typical steaming from the summit caldera cone that has been the site of activity over recent years. No ash has been observed or detected in satellite images, but low-level ash emissions could occur with very little additional warning.

Currently the earthquakes are small in magnitude but are registering across the entire seismic network. Seismicity rates are high and have varied between 5-10 earthquakes per hour during quieter periods to 1-3 earthquakes per minute during more intense activity.

Please note that the Veniaminof web camera is currently not operating. Plans have been made to fix this camera, but the time frame is uncertain.


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