USGS Volcano Hazards Program Volcano Update

AVO update page and observatory web site

The most recent explosions of Cleveland volcano detected by networks on Okmok, 120 km (80 mi) to the northeast of Cleveland, occurred around 12:30 pm AKDT yesterday (20:30 UTC). Overall however infrasonic data suggest that the eruption has continued to wane since Sunday. The volcano has been obscured by clouds in satellite data over the past 24 hours.

Sudden explosions of blocks and ash are possible with little or no warning. Ash clouds, if produced, could exceed 20,000 feet above sea level. If a large ash-producing event occurs, nearby seismic, infrasound, or volcanic lightning networks should alert AVO staff quickly. However, for some events, a delay of several hours is possible. Cleveland Volcano does not have a local seismic network and is monitored using only distant seismic and infrasound instruments and satellite data.

AVO will continue to monitor the volcano and issue additional information as available.

Update in Common Alerting Protocol (CAP) format