File:Mount St. Helens 05-18-1980.jpg
Original file (984 × 1,460 pixels, file size: 506 KB, MIME type: image/jpeg)
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Summary
| Description |
On May 18, 1980, at 8:32 a.m. Pacific Daylight Time, a magnitude 5.1 earthquake shook Mount St. Helens. The bulge and surrounding area slid away in a gigantic rockslide and debris avalanche, releasing pressure, and triggering a major pumice and ash eruption of the volcano. Thirteen-hundred feet (400 meters) of the peak collapsed or blew outwards. As a result, 24 square miles (62 square kilometers) of valley was filled by a debris avalanche, 250 square miles (650 square kilometers) of recreation, timber, and private lands were damaged by a lateral blast, and an estimated 200 million cubic yards (150 million cubic meters) of material was deposited directly by lahars (volcanic mudflows) into the river channels. Fifty-seven people were killed or are still missing. USGS Photograph taken on May 18, 1980, by Austin Post (see http://vulcan.wr.usgs.gov/Volcanoes/MSH/Images/may18_images.html). This is a cropped, smaller version of the 2048 x 3072 pixel USGS source image. |
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| Date | Taken on 18 May 1980 | |||||||||||||
| Source | http://vulcan.wr.usgs.gov/Imgs/Jpg/MSH/Images/MSH80_eruption_mount_st_helens_05-18-80.jpg | |||||||||||||
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Licensing
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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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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:49, 11 November 2007 | | 984 × 1,460 (506 KB) | WolfmanSF | I made a cropped, smaller version of the massive original image. ~~~~ |
| 00:24, 11 November 2007 |  | 2,048 × 3,072 (3.46 MB) | WolfmanSF | {{Information |Description=On May 18, 1980, at 8:32 a.m. Pacific Daylight Time, a magnitude 5.1 earthquake shook Mount St. Helens. The bulge and surrounding area slid away in a gigantic rockslide and debris avalanche, releasing pressure, and triggering a |
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