Eruption of Alaska volcano breaks historic pattern

Eos, Transactions, American Geophysical Union
By: , and 



In the late morning of 12 July 2008, the Alaska Volcano Observatory (AVO) received an unexpected call from the U.S. Coast Guard, reporting an explosive volcanic eruption in the central Aleutians in the vicinity of Okmok volcano, a relatively young (~2000-year-old) caldera. The Coast Guard had received an emergency call requesting assistance from a family living at a cattle ranch on the flanks of the volcano, who reported loud "thunder," lightning, and noontime darkness due to ashfall. AVO staff immediately confirmed the report by observing a strong eruption signal recorded on the Okmok seismic network and the presence of a large dark ash cloud above Okmok in satellite imagery. Within 5 minutes of the call, AVO declared the volcano at aviation code red, signifying that a highly explosive, ash-rich eruption was under way.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Eruption of Alaska volcano breaks historic pattern
Series title Eos, Transactions, American Geophysical Union
DOI 10.1029/2009EO200001
Volume 90
Issue 20
Year Published 2009
Language English
Publisher American Geophysical Union
Contributing office(s) Alaska Science Center, Volcano Hazards Program, Volcano Science Center
Description 2 p.
First page 173
Last page 174
Country United States
State Alaska
Other Geospatial Okmok Volcano
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