A massive flank collapse of on older Shishaldin volcano edifice caused these large blocks to tumble down the side of the mountain, sometime in the early Holocene. The event created a debris field covering an area of over 2,000 acres (~3.7 square miles or miles or ~9.6 square kilometers) and extending ~7 miles (~11 km) from the source on the upper flanks.
Date: Aug 15th, 2018
Volcano(es): Shishaldin
Photographer: Schaefer, Janet
URL: avo.alaska.edu/image/view/124541
Location:
Volcano(es): Shishaldin
Photographer: Schaefer, Janet
URL: avo.alaska.edu/image/view/124541
Latitude: 54.719791666667
Longitude: -164.09770277778
Image courtesy of the AVO/ADGGS.
Please cite the photographer and the Alaska Volcano Observatory / Alaska Division of Geological & Geophysical Surveys when using this image.
Full Resolution.