Printer friendly versionAVO/USGS Volcanic Activity Notice
Current Volcano Alert Level: UNASSIGNED
Previous Volcano Alert Level: ADVISORY
Current Aviation Color Code: UNASSIGNED
Previous Aviation Color Code: YELLOW
Thursday, May 7, 2020, 3:37 PM AKDT
Alaska Volcano Observatory
N 52 deg 49 min W 169 deg 56 min
5676 ft (1730 m)
Volcanic Activity Summary: A sustained decline in volcanic unrest at Cleveland Volcano over the last several months has prompted the Alaska Volcano Observatory to downgrade the Aviation Color Code and Volcano Alert Level from YELLOW/ADVISORY to UNASSIGNED/UNASSIGNED.
The last explosive eruption at Cleveland occurred on January 9, 2019, and was followed by the extrusion of a small mound of lava in the summit crater. Since then, there has been an overall decrease in detected surface temperature and no observed changes in the summit crater.
Cleveland is one of the most active volcanoes of the Aleutian Arc, and the latest eruptive phase has waxed and waned almost annually since 2001. Local seismic, infrasound, and web camera data have been mostly unavailable for several weeks due to an equipment failure in a remote facility. Nonetheless, monitoring of Cleveland continues with regional seismic and infrasound stations on nearby islands. These, along with lightning and satellite data, should allow AVO to detect an ash-producing eruption, if one were to occur.
[Volcanic cloud height] None
[Other volcanic cloud information] n/a
Michelle Coombs, Scientist-in-Charge, USGS
firstname.lastname@example.org (907) 786-7497
David Fee, Coordinating Scientist, UAFGI
email@example.com (907) 322-4085
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.