File:North Fork Toutle River valley in November 1983.jpg
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[edit]DescriptionNorth Fork Toutle River valley in November 1983.jpg | This downstream view of the North Fork Toutle River valley, north and west of St. Helens, shows part of the 0.55 cubic miles (2.3 km3) of debris avalanche that slid from the volcano on May 18. This is enough material to cover Washington, D.C. to a depth of 43 feet (13 m). The avalanche traveled approximately 15 miles (24 km) downstream at a velocity exceeding 150 miles per hour (240 km/h). It left behind a hummocky deposit with an average thickness of 150 feet (45 m) and a maximum thickness of 590 feet (180 m). |
Date | Taken on 30 November 1983 |
Source | Archived source link |
Author | Lyn Topinka, USGS/CVO |
Permission (Reusing this file) |
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[edit]Public domainPublic domainfalsefalse |
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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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:42, 5 April 2021 | 2,913 × 1,977 (2.51 MB) | Hike395 (talk | contribs) | higher resolution | |
04:49, 26 November 2010 | 543 × 319 (104 KB) | Aavindraa (talk | contribs) | use original files' color | ||
04:16, 15 July 2008 | 543 × 319 (32 KB) | Jarekt (talk | contribs) | {{Information |Description=Cropped watermark |Source= |Date= |Author= |Permission= |other_versions= }} | ||
10:56, 14 March 2006 | 543 × 353 (39 KB) | Reelax (talk | contribs) | == Description == This downstream view of the North Fork Toutle River valley, north and west of St. Helens, shows part of the nearly 2/3 cubic miles (2.3 cubic kilometers) of debris avalanche that slid from the volcano on May 18. This is enough material t |
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Horizontal resolution | 300 dpi |
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Vertical resolution | 300 dpi |
Software used | GIMP 2.10.18 |
File change date and time | 03:39, 5 April 2021 |
Color space | sRGB |