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Cleveland Volcano Activity April 7, 2012


2012-04-07 11:57:09 - Status Report

Saturday, April 7, 2012 11:57 AM AKDT (Saturday, April 7, 2012 19:57 UTC)


Cleveland Volcano lava dome Feb. 10, 2012CLEVELAND VOLCANO (CAVW #1101-24-)
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

The low-level eruption of Cleveland continues. Two short-duration explosions occurred yesterday at approximately 4:35PM AKDT (00:35 UTC) and 9:26PM AKDT (05:26 UTC) that were detected by distant infrasound (air pressure) and seismic stations. The resulting eruption clouds were low level, ash poor and did not rise above the about 10,000 feet above sea level (3km). Elevated surface temperatures were observed in satellite images near the times of the explosions, further indicating that low-level unrest continues. There have been no observations of renewed dome growth at this time.

While the volcano remains active, sudden explosions of blocks and ash are likely. It is possible for associated ash clouds to exceed 20,000 feet above sea level. If a larger ash-producing event occurs, seismic, infrasound, or volcanic lightning networks should detect the event and alert AVO staff. There is no real-time seismic monitoring network on Mount Cleveland so AVO is unable to track activity in real time.

Satellite radar image from the TerraSAR-X sensor, showing the summit of Cleveland Volcano. Image collected on February 10, 2012, and shows the presence of a small lava dome within the summit crater. The summit crater is about 200 meters across. Note that satellite radar images have some inherent topographic distortion due to the manner in which they are collected.

IMAGE: Courtesy of AVO/USGS | Photographer/Creator: Zhong Lu

60°1'55" N 153°5'30" W, Summit Elevation 10016 ft (3053 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Seismic activity at Iliamna Volcano remains slightly above background. Intermittent clear web camera and satellite views show no unusual activity today.

The current activity at Iliamna does not indicate an imminent or certain eruption. A similar seismic swarm at Iliamna in 1996-1997 was not followed by eruptive activity. Prior to an eruption, AVO would expect to see a further increase in earthquake activity.

VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu

John Power, Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497

Mike West, Acting Coordinating Scientist, UAF
west@gi.alaska.edu (907) 474-6977

The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.

ORANGE/WATCH 2012-04-06 10:59:59 - Weekly Update
ORANGE/WATCH 2012-04-05 12:06:33 - Status Report
ORANGE/WATCH 2012-04-04 12:27:36 - Status Report
ORANGE/WATCH 2012-04-03 12:56:31 - Status Report
ORANGE/WATCH 2012-04-02 11:17:10 - Status Report
ORANGE/WATCH 2012-04-01 11:09:39 - Status Report
ORANGE/WATCH 2012-03-31 12:06:51 - Status Report

More ...

All Cleveland Reports

Topo map of Cleveland volcano in Alaska.Topographic shaded relief map of Chuginadak Island and Cleveland Volcano.

Image created by the Alaska Volcano Observatory using BigTopo 7 software and AllTopo 7 U.S. Geological Survey topographic maps.


MAP: Alaska Volcano Observatory, the U.S. Geological Survey, BigTopo 7, and AllTopo 7

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