Printer friendly versionALASKA VOLCANO OBSERVATORY
Saturday, February 11, 2006 1:55 PM AKST (2255 UTC)
52.8232°N 169.9431°W, Summit Elevation 5676 ft (1730 m)
Current Level of Concern Color Code: YELLOW
Previous Level of Concern Color Code: ORANGE
AVO is downgrading the level of concern color code for Cleveland Volcano from Orange to YELLOW. AVO has received no new information about further eruptive activity or ash emissions at Cleveland Volcano since February 6 and no ash clouds have been detected in satellite imagery over the past week. Cloud cover has obscured the volcano for most of the week and good views of the have not been possible. Thus, we have not been able to verify that eruptive activity has ended and it is possible that the volcano remains in a state of low-level unrest.
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
Steve McNutt, Acting Coordinating Scientist, UAF-GI
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.