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Alaska: another small explosion at Cleveland 11 March 2012

Posted by admin in activity reports, Alaska, Cleveland, eruptions, Iliamna, United States.
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The Alaska Volcano Observatory reports another small explosive event at Cleveland volcano, following the small explosion detected on 7 March. This one happened in the afternoon (local time) of 9 March, as the AVO Volcanic Activity Notification reports:

Another small, short duration explosion from Cleveland Volcano was detected on distant seismic stations and infrasound arrays on about 1:55 March 10, UTC (4:05 PM March 9, AKST.) No ash cloud from this event was detected in satellite imagery probably due to cloudy weather conditions. This explosion was similar to recent small events that occurred on March 7 and in December 2011. These events produced small ash clouds that dissipated quickly and did not affect air traffic.

The Volcano Alert Level for Cleveland remains at Watch, the Aviation Colour Code at Orange. The same report gives an update on Iliamna, where seismic activity remains above background. Iliamna’s alert status is currently one notch below Cleveland’s, at Volcano Alert Level Advisory, Aviation Colour Code Yellow.

News
Cleveland volcano rocked by explosionAnchorage Daily News, 10 March 2012.

Information
Global Volcanism Program: Cleveland – summary information for Cleveland (1101-24-)
Global Volcanism Program: Iliamna – summary information for Iliamna (1103-02-)
AVO Cleveland Activity Page – information on current activity at Cleveland
AVO Iliamna Activity Page – information on current activity at Iliamna
Alaska Volcano Observatory – AVO main page

The Volcanism Blog

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