USGS Volcano Hazards Program Volcano Update

AVO update page and observatory web site

Eruptive activity at Pavlof Volcano is continuing, but has declined since yesterday. The level of seismicity over the past 24 hours has gradually declined and now consists of intermittent bursts of tremor and occasional small explosions. Periods of continuous tremor and intermittent small explosions are likely associated with lava fountaining and minor ash production.

Satellite data over the past 24 hours has shown a plume extending to the northwest from the volcano containing a small amount of ash. Strong thermal signals at the summit also have been evident in satellite imagery. Pilot reports this morning have indicated that plumes are rising to lower levels than yesterday and are generally in the range of 20,000 to 25,000 feet above sea level. AVO has received no reports of ash fall on nearby communities today.

At the current level of unrest, some lava fountaining and ash emission are likely occurring. Lava fountaining is likely producing spatter-fed lava flows that are descending the flanks of the volcano and will occasionally interact with snow and ice to produce volcanic mudflows and intermittent steam plumes. It is possible for the character of the eruption to change at any time and more vigorous seismicity and ash emissions may result. AVO is monitoring the eruption closely and will issue further information if or when conditions change.

Update in Common Alerting Protocol (CAP) format