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Alert level raised at Iliamna volcano, Alaska 10 March 2012

Posted by admin in activity reports, Alaska, Iliamna, United States.
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Increased seismic activity has been evident at Iliamna volcano in Alaska since late last year. The Alaska Volcano Observatory has been watching Iliamna closely, and has decided that the elevated activity is significant enough to merit an increase in the volcano’s alert level. The new status of Iliamna is Advisory/Yellow. The AVO volcanic activity notice reads as follows:

Over the past three months the earthquake rate at Iliamna Volcano has steadily increased and now exceeds normal background levels. Although it is not certain that this sustained increase in earthquake activity represents the movement of magma at depth, it is a significant change and AVO has increased the Alert Level to Advisory and the Aviation Color Code to Yellow. The current activity does not mean an eruption is imminent or certain. A similarly energetic episode of seismic unrest from September 1996 to February 1997 was likely related to the intrusion of new magma at depth, but an eruption did not occur.

Iliamna has a real-time seismic network, and AVO will continue to monitor the volcano’s activity closely.

News
Alert level raised for Alaska volcano – WKYC, 9 March 2012
Alert level raised for Alaska’s Iliamna volcanoAlaska Dispatch, 9 March 2012
Increased seismic activity prompts alert level change for Alaska volcanoWashington Post, 9 March 2012

Information
Global Volcanism Program: Iliamna – summary information for Iliamna (1103-02-)
AVO Iliamna activity page – AVO page for Iliamna activity
Alaska Volcano Observatory – AVO main page

The Volcanism Blog