Printer friendly versionALASKA VOLCANO OBSERVATORY
Tuesday, May 23, 2006 5:50 PM AKDT (150 UTC)
52°49'24"N 169°56'35"W , Summit Elevation 5676 ft (1730 m)
Current Level of Concern Color Code: YELLOW
AVO received a report this afternoon from an astronaut aboard the International Space Station indicating that a plume was observed moving west from Cleveland Volcano at 3 PM ADT (2300 UTC). The volcanic plume was seen in AVHRR satellite data beginning from 3:07 PM ADT (2307 UTC). The most recent image at 5:00 PM AKST (0100 UTC) showed a small detached ash plume approximately 82 miles (130 kilometers) SW of Cleveland Volcano. Initial data suggest a cloud height of about 20,000 ft asl. We see no indication of continuous activity and the cloud has detached from the volcano.
Note: Cleveland volcano does not have a real-time seismic network and therefore we are unable to monitor seismic changes; AVO has no definitive information about background activity.
Cleveland volcano forms the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutians. It is located about 75 km (45 mi) west of the community of Nikolski, and 1500 km (940 mi) southwest of Anchorage. Historical eruptions at Cleveland volcano have been characterized by short-lived explosive bursts of ash, at times accompanied by lava fountaining, lava flows, and debris flows down the flanks. In February, 2001, Cleveland had 3 explosive events that produced ash clouds as high as 12 km (39,000 ft) above sea level. That eruption also produced a rubbly lava flow and hot avalanche that reached the sea.
ABBREVIATED COLOR CODE KEY
(contact AVO for complete description):
GREEN volcano is dormant; normal seismicity and fumarolic activity occurring
YELLOW volcano is restless; eruption may occur
ORANGE volcano is in eruption or eruption may occur at any time
RED significant eruption is occurring or explosive eruption expected at any time
VOLCANO INFORMATION ON THE INTERNET: http://www.avo.alaska.edu
RECORDING ON THE STATUS OF ALASKA'S VOLCANOES (907) 786-7478
Tom Murray, Scientist-in-Charge, USGS
firstname.lastname@example.org (907) 786-7497
Jessica Larsen, Acting Coordinating Scientist, UAF-GI
email@example.com (907) 474-7992
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.