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svg map of the 1980 mount st helens ash fallout, info from usgs map: Date: 6 December 2007: Source: Own work: Author: Murraybuckley: Permission (Reusing this file) all rights released: Other versions: png version
The ash cloud produced by the eruption, as seen from the village of Toledo, Washington, 35 mi (56 km) to the northwest of Mount St. Helens: The cloud was roughly 40 mi (64 km) wide and 15 mi (24 km; 79,000 ft) high. Ash cloud from Mt. St. Helens as captured by the GOES 3 weather satellite at 15:45 UTC.
Topographic map(OTM) Cross-wiki upload from en.wikipedia.org: File usage. The following page uses this file: 1980 eruption of Mount St. Helens; Global file usage.
The upper part of the North Fork Toutle River watershed was redirected to the crater of Mount St. Helens itself until 1982. The river's headstreams begin on a volcanic ash deposit roughly 3 miles (5 km) long and 200 feet (61 m) deep, which is the source of much of the excess sediment.
Mount St. Helens, once the fifth-tallest peak in Washington State, lost about 1,300 feet from its height of 9,677, according to the USGS. The highest part of the crater rim on the southwestern ...
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The Toutle River is a 17.2-mile (27.7 km) tributary of the Cowlitz River in the U.S. state of Washington.It rises in two forks merging near Toutle below Mount St. Helens and joins the Cowlitz near Castle Rock, 20 miles (32 km) upstream of the larger river's confluence with the Columbia River.
Mount St. Helens' eruptive activity continued over the following days, with steam releases occurring on October 4 at 9:47 a.m., 2:12 p.m., and at 5:40 p.m.; then again on the morning of October 5 at around 9:03 a.m., with an ash plume that dusted Randle, Morton, and Packwood, Washington, towns on or near U.S. Route 12 about 30 miles (48 km ...