ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Thursday, February 22, 2018, 12:58 PM AKST (Thursday, February 22, 2018, 21:58 UTC)


CLEVELAND VOLCANO (VNUM #311240)
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Unrest continues at Cleveland volcano. Seismic and infrasound data from 06:54 UTC (21:54 AKST 21 Feb) suggests that a small explosion may have occurred. Clear satellite views around this time do not show an ash cloud or other signs of volcanic activity; however, a later image from 14:15 UTC (05:15 AKST) shows moderately elevated surface temperatures extending about 2 km ESE from the summit, indicative of a warm deposit.

Cleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.


OTHER ALASKA VOLCANOES

Information on all Alaska volcanoes is available at : http://www.avo.alaska.edu.

For definitions of Aviation Color Codes and Volcano Alert Levels, see: http://www.avo.alaska.edu/color_codes.php

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CONTACT INFORMATION:

Aaron Wech, Acting Scientist-in-Charge, USGS
awech@usgs.gov (907) 786-7497

Pavel Izbekiv, Acting Coordinating Scientist, UAFGI
peizbekov@alaska.edu (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.