File:MSH82 lahar from march 82 eruption 03-21-82.jpg

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Summary

Description
English: Mount St. Helens erupted often between 1980 and 1986. An explosive eruption on March 19, 1982, sent pumice and ash 9 miles (14 km) into the air, and resulted in a lahar (the dark deposit on the snow) flowing from the crater into the North Fork Toutle River valley. Part of the lahar entered Spirit Lake (lower left corner) but most of the flow went west down the Toutle River, eventually reaching the Cowlitz River, 50 miles (80 km) downstream.
Date Taken on 21 March 1982
Source Archived source link, direct link
Author Tom Casadevall, USGS

Licensing

Public domain
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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21 March 1982

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Date/TimeThumbnailDimensionsUserComment
current11:07, 25 July 2011Thumbnail for version as of 11:07, 25 July 20112,976 × 1,901 (1.54 MB)Aavindraaremove fog
06:14, 9 August 2005Thumbnail for version as of 06:14, 9 August 20052,976 × 1,901 (1.13 MB)Complex01USGS photo of Mt. Saint Helens. '''Caption''': Mount St. Helens erupted often between 1980 and 1986. An explosive eruption on March 19, 1982, sent pumice and ash 9 miles (14 kilometers) into the air, and resulted in a lahar (the dark deposit on the snow)

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