Released in March 2026, the updated Volcano Observatory Notification for Aviation (VONA) format uses standardized aviation terminology to describe volcanic activity and potential ash hazards for pilots and aviation authorities. The updated VONA follows recommended practices from the International Civil Aviation Organization. The USGS and its five volcano observatories will issue VONAs as needed in response to changes in volcanic activity across the United States.
Date: Mar 4th, 2026
Volcano(es):
Photographer: Stovall, Wendy
URL: avo.alaska.edu/image/view/197148
Credit: Image courtesy of AVO/USGS.
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
Full Resolution.
Volcano(es):
Photographer: Stovall, Wendy
URL: avo.alaska.edu/image/view/197148
Credit: Image courtesy of AVO/USGS.
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
Full Resolution.
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