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At approximately 19:15 AKDT (04:15 UTC) last night, August 29, a swarm of high-frequency earthquakes began at Little Sitkin volcano. This anomalous seismic activity continued through the night and has increased this morning. No eruptive activity is currently indicated. Clouds obscure satellite images of the area.
AVO is closely monitoring the situation and will issue further updates as conditions change.
Although a 4-station seismic network was installed on Little Sitkin Island in 2005, the volcano has not formally been on AVO's list of seismically monitored volcanoes because of chronic telemetry problems resulting in intermittent and sporadic recording of seismic data. Recent work in June 2012 on the receiving station on Amchitka Island resolved most of the communication issues, and data from the 4 stations on Little Sitkin Island are currently recorded and processed, and AVO continues efforts to establish background seismic levels at the volcano.