USGS Volcano Hazards Program Volcano Update

AVO update page and observatory web site

Throughout most of the past week, seismic activity was slightly above background. Beginning at 13:09 AKST yesterday, November 15, a swarm of volcano tectonic earthquakes was detected at the volcano. The swarm has since quieted but AVO continues to monitor the situation carefully. Yesterday's activity was similar to that recorded in August, at the beginning of the current unrest. Nothing unusual has been observed in mostly cloudy satellite images and AVO has received no reports of unusual activity at Little Sitkin over the past week.
Little Sitkin volcano occupies Little Sitkin Island in the western Aleutian Islands, and is within the Aleutian Island National Wildlife Refuge. The active stratovolcano rises 1188 m (3898 ft) in the center-northeastern part of the island. The island is 330 km (200 mi) northwest of the community of Adak, 377 km (234 mi) southeast of Attu, and 2173 km (1350 mi) southwest of Anchorage, Alaska. Little Sitkin has no confirmed historical eruptions, although eruptive activity near the turn of the last century seems probable based on vegetation cover of the youngest-looking lava flows. Three long-lived fumarolic and hot springs areas are known including a cluster of boiling, acidic pools on the west flank of the volcano.

Update in Common Alerting Protocol (CAP) format