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U.S. Geological Survey
Monday, August 2, 2021, 12:25 AM AKDT (Monday, August 2, 2021, 08:25 UTC)

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

Strong winds blowing to the north in the region north of Aniakchak and east of Port Heiden have picked up loose volcanic ash and carried it to the north today. A dense cloud of possible resuspended volcanic ash was observed near ground levels in a web camera at Port Heiden. Satellite views confirm that this cloud has been drifting to the north approximately 200 km. The height of this cloud is not known, but resuspended ash clouds are typically from sea level up to 5 km in altitude.

This phenomenon is not the result of volcanic activity and usually occurs seasonally in the spring and fall during times of high winds and dry snow-free conditions in volcanic areas of Alaska. No eruption is in progress. Aniakchak remains at GREEN.

Resuspended volcanic ash should be considered hazardous and could be damaging to aircraft and health. For more information on volcanic ash and human health, visit the following website: http://volcanoes.usgs.gov/ash/. Official warnings about these ash resuspension events are issued by the National Weather Service: http://pafc.arh.noaa.gov/ . Forecasts of airborne ash hazard to aircraft: http://aawu.arh.noaa.gov . Volcanic Ash Advisories: http://vaac.arh.noaa.gov/ . Forecasts of ash fall: http://pafc.arh.noaa.gov/ . Air quality hazards and guidance from Alaska Department of Environmental Conservation, Division of Air Quality: http://dec.alaska.gov/Applications/Air/airtoolsweb/Advisories/Index


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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Matt Haney, Acting Scientist-in-Charge, USGS mhaney@usgs.gov (907) 786-7497

David Fee, Coordinating Scientist, UAF dfee1@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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