USGS Volcano Hazards Program Volcano Update

AVO update page and observatory web site

Eruptive activity at Pavlof continued over the past week. Persistent elevated surface temperatures consistent with lava effusion were observed in satellite images, and minor ash plumes below 20,000 ft were generated through most of the week. There were no reports of ash fall on local communities. On June 18, small discreet ash puffs were seen in images of the volcano from a web camera located in Cold Bay. Refer to the NWS Alaska Aviation Weather Unit ( for updates on SIGMETs related to ash emissions.

Volcanic tremor and small explosions continue to be detected on the compromised but functional local seismic network. The volcano is obscured by weather in recent web camera images.

Previous eruptions of Pavlof Volcano have lasted for weeks, months or years and often exhibit fluctuating levels of activity and it is not uncommon for the volcano to enter short periods of repose followed by vigorous ash emissions, lava fountaining, and lahar generation. Occasionally past eruptions have generated vigorous ash emissions and clouds that reached 30,000-50,000 ft. above sea level. We expect this eruption to proceed in a manner similar to previous eruptions.

Eruptive activity at Pavlof could increase with little to no warning.

Pavlof volcano is located on the southwestern end of the Alaska Peninsula. Pavlof is a stratovolcano which rises to an elevation of 8262 feet. With almost 40 historic eruptions, it is one of the most consistently active volcanos in the Aleutian arc. Eruptive activity is generally characterized by sporadic strombolian fountaining continuing for a several-month period. The community of Cold Bay is located 60 km (37 miles) to the southwest of Pavlof.

Update in Common Alerting Protocol (CAP) format