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AVO VOLCANO ACTIVITY NOTIFICATION

ALASKA VOLCANO OBSERVATORY INFORMATION STATEMENT
U.S. Geological Survey
Tuesday, June 25, 2019, 9:05 AM AKDT (Tuesday, June 25, 2019, 17:05 UTC)


ILIAMNA VOLCANO (VNUM #313020)
60°1'55" N 153°5'30" W, Summit Elevation 10016 ft (3053 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

AVO detected seismic and pressure sensor signals associated with a debris avalanche on Red Glacier on the flank of Iliamna Volcano around 4:05 p.m. Alaska Daylight Time on Thursday, June 20, 2019 (00:00 UTC on June 21, 2019). Avalanche events are somewhat common at this volcano. The most recent prior to last week's occurred in April 2019. The seismic signals from the avalanche were observed on volcano monitoring networks on Illiamna and Redoubt volcanoes. Infrasound from this slide was detected with pressure sensors in Dillingham, Fairbanks, and those on the EarthScope Transportable Array. The avalanche and subsequent seismicity and infrasound are not considered to be indicative of volcanic unrest.

Iliamna volcano is located on the western side of lower Cook Inlet in the Lake Clark National Park. Iliamna is a snow-covered stratovolcano which rises 10,020 feet above sea level. Although steam plumes occur on its eastern flanks, there has been no historic volcanic activity at Iliamna. Iliamna is located 225 km (140 miles) southwest of Anchorage and 113 km (70 miles) northwest of Homer.

OTHER ALASKA VOLCANOES

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CONTACT INFORMATION:

John Paskievitch, Acting Scientist-in-Charge, USGS
jpaskie@usgs.gov (907) 786-7497

Taryn Lopez, Acting Coordinating Scientist, UAF
tmlopez@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.
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