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AVO VOLCANO ACTIVITY NOTIFICATION

ALASKA VOLCANO OBSERVATORY INFORMATION STATEMENT
U.S. Geological Survey
Friday, October 23, 2015, 9:53 AM AKDT (Friday, October 23, 2015, 17:53 UTC)


ANIAKCHAK VOLCANO (VNUM #312090)
56°54'21" N 158°12'32" W, Summit Elevation 4400 ft (1341 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

The Alaska Volcano Observatory (AVO) has re-established five of the six seismic monitoring instruments at Aniakchak Volcano and can now confidently monitor seismic unrest at the volcano. The maintenance work was completed this summer. With renewed seismic monitoring, the volcano moves from "UNASSIGNED" to Volcano Alert Level NORMAL and Aviation Color Code GREEN. As at other Alaska volcanoes, AVO will continue to use satellite and infrasound data, and reports from pilots and ground observers to detect signs of eruptive activity.

Aniakchak Volcano is located on the Alaska Peninsula about 670 km (416 mi) southwest of Anchorage, Alaska in the Aniakchak National Monument. The volcano is a 10-km-wide (6 mi), 0.5- to 1.0-km-deep (1,640 to 3,281 ft) caldera that has been the source of many violent, explosive eruptions in the past 1,000 years. The last eruption at Aniakchak occurred in 1931 producing a large ash cloud that extended over much of the Alaska Peninsula and south-central Alaska and is the second largest explosive eruption historically in Alaska.




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

FOR MORE INFORMATION ON ALASKA VOLCANOES: http://www.avo.alaska.edu

SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/

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CONTACT INFORMATION:

John Power, Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497

Jeff Freymueller, Coordinating Scientist, UAFGI
jeff.freymueller@gi.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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