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Measuring volcanic ash on snow

Detailed Description

Ashfall deposit in Anchor Point, AK from the April 4, 2009 eruption of Redoubt Volcano. This is an example of a well-documented photograph of ashfall by a citizen scientist. The scale is from AVO's Ash Collection Worksheet downloadable from:


Image courtesy of the photographer, Lori Blank. AVO has permission to use this photo.