Ashfall for 4 major eruptions in the U.S.

Map of western U.S. with volcanic ashfall outlines.

Detailed Description

Map showing the minimum area covered by volcanic ash from eruptions of Valles Caldera, Mount St. Helens, Yellowstone, and Long Valley Caldera.

Details

Image Dimensions: 1170 x 1033

Date Taken:

Location Taken: US