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COLOR CODE: ORANGE
Eruptive activity continues at Pavlof Volcano. Two half-hour periods of intense seismicity, beginning 11:30 AM AST (2030 UTC) on November 22 and at 4:30 AM AST (1330 UTC) November 23, resulted in steam and ash emissions reaching altitudes of approximately 30,000 feet ASL and extending downwind. A small ash plume from the November 23 event was detected moving several hundred kilometers to the northwest. No ashfall was reported from local communities this week. Two lava flows continue to advance down the north flank. Lava fountaining and production of local diffuse ash clouds were observed this week and are likely to continue for weeks or months. The Level of Concern Color Code remains at ORANGE and AVO will continue to monitor the volcano closely.
Pavlof is located 600 miles southwest of Anchorage. The
nearest towns to the volcano are Cold Bay (37 mi SW), King
Cove (30 mi SW), Sand Point (60 mi E), and Nelson Lagoon
(50 mi NE). These towns could expect light ash fall
depending on wind direction and level of eruptive
Seismic activity is monitored in real time at the following volcanoes. Some of the volcanoes listed below may have anomalous seismicity, as noted, but are not considered to be at a potentially dangerous level of unrest.
The seismic swarm that began on 1 August 1996 beneath Iliamna Volcano continued during the past week at an average rate of about 3 earthquakes per day.
Spurr, Redoubt, Augustine, Griggs, Katmai, Trident, Mageik, Martin, Dutton, Akutan, and Makushin volcanoes are all at or near normal levels of seismicity.
AVO maintains a computerized alarm system capable of notifying AVO seismologists during non-business hours should unusual seismic activity occur at monitored Alaskan volcanoes.