Printer friendly versionAVO/USGS Volcanic Activity Notice
Current Volcano Alert Level: WATCH
Previous Volcano Alert Level: ADVISORY
Current Aviation Color Code: ORANGE
Previous Aviation Color Code: YELLOW
Friday, March 24, 2017, 11:24 AM AKDT
Alaska Volcano Observatory
N 52 deg 49 min W 169 deg 56 min
5676 ft (1730 m)
Volcanic Activity Summary: A small explosion was detected at Cleveland volcano at 08:15 AKST (16:15 UTC) today in both seismic and infrasound (pressure sensor) data. As a result AVO is increasing the Aviation Color Code to Orange and the Alert Level to Watch. This event was short lived and similar, if not smaller, than recent explosions at this volcano. Cloud cover to 30,000 feet above sea level is obscuring observations of the volcano by satellite views and no ash cloud has been observed. The ash cloud that was likely generated during this explosion has probably dissipated at this time and was likely not above 20,000 feet above sea level.
Cleveland volcano is not monitored with a real-time seismic network and this inhibits AVO's ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and seismic instruments on the island.
[Volcanic cloud height] No volcanic cloud observed.
[Other volcanic cloud information] Likely below 20,000 feet above sea level and has likely dissipated at this time.
[General hazards] local only
[Ash cloud] Likely dissipated at this time
Michelle Coombs, Scientist-in-Charge, USGS
email@example.com (907) 786-7497
Jeff Freymueller, Coordinating Scientist, UAFGI
firstname.lastname@example.org (907) 322-4085
A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at
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.