Shishaldin, Alaska: Seismic activity continues.

Shishaldin, Alaska: Seismic activity continues.

Seismic activity continues at levels above background and has changed little over the past week. Thermal signals and minor steaming have been observed intermittently in satellite and web camera views of the volcano during the past week. It remains possible that very low level eruptive activity is continuing within the summit crater of the volcano.

Shishaldin volcano, located near the center of Unimak Island in the eastern Aleutian Islands, is a spectacular symmetric cone with a base diameter of approximately 16 km (10 mi). A 200-m-wide (660 ft) funnel-shaped summit crater typically emits a steam plume and occasional small amounts of ash. Shishaldin is one of the most active volcanoes in the Aleutian volcanic arc, with at least 54 episodes of unrest including over 24 confirmed eruptions since 1775. Most eruptions are relatively small, although the April-May 1999 event generated an ash column that reached 45,000 ft above sea level.

October 10, 2015. Shishaldin, Alaska:

54 ° 45’19 « N 163 ° 58’16 » W,

Summit Elevation 9373 ft (2857 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Source : AVO

Photo : Werner, Cindy

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