* Astronomy

Blobrana · L

RE: Okmok Caldera

Blobrana · L

This AVHRR Thermal IR (Channel 4) satellite image captured at 4:15 PM ADT on July 12, 2008 shows the ash cloud from the Okmok eruption which began at 11:43 AM ADT, July 12, 2008.

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Credit AVO/UAF-GI.

Blobrana · L

A volcano erupted Saturday with little warning on a remote island in Alaska, sending residents of a ranch fleeing from falling ash and volcanic rock.
Okmok Caldera erupted hours after seismologists at the Alaska Volcano Observatory began detecting a series of tremors. The explosion flung an ash cloud at least 50,000 feet high...
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Mount Okmok is the highest point on the rim of Okmok Caldera (Unmagim Anatuu in Aleut) on the northeastern part of Umnak Island in the eastern Aleutian Islands of Alaska. This 9.3 km wide circular caldera truncates the top of a large shield volcano.

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Okmok is 60 miles west of the fishing port of Dutch Harbor on Unalaska Island.
The 3,500-foot volcano last erupted in 1997, but has shown signs of increased activity during the last few months.

Latitude: 53°28′05″N, Longitude: 168°10′30″W