Printer friendly versionALASKA VOLCANO OBSERVATORY
Monday, February 20, 2006 1:55 PM AKST (2255 UTC)
52°49'24"N 169°56'35"W , Summit Elevation 5676 ft (1730 m)
Current Level of Concern Color Code: Not Assigned
Previous Level of Concern: YELLOW
AVO is downgrading the Level of Concern Color Code for Cleveland Volcano. Because Cleveland is not monitored with real-time seismic instrumentation, we do not assign it Color Code Green, but instead leave it "UNASSIGNED".
No new information about ash emissions have been received, nor have indications of continuing activity been detected from satellite data for the volcano since it erupted an ash cloud that was detected by satellite on February 6.
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
email@example.com (907) 786-7497
Steve McNutt, Acting Coordinating Scientist, UAF-GI
firstname.lastname@example.org (907) 474-7131
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.