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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.
Mount Hood, the nearest major volcanic peak in Oregon, is 60 miles (100 km) southeast of Mount St. Helens. Mount St. Helens is geologically young compared with the other major Cascade volcanoes. It formed only within the past 40,000 years, and the summit cone present before its 1980 eruption began rising about 2,200 years ago. [ 11 ]
Date/Time Thumbnail Dimensions User Comment; current: 01:53, 7 December 2007: 884 × 569 (104 KB): Murraybuckley {{Information |Description=svg map of the 1980 mount st helens ash fallout, info from usgs map |Source=self-made |Date=6 dec 2007 |Author= Murraybuckley |Permission= all rights released |other_versions= png version [[Image:1980_St._
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 ...
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 ...
Located in southern Washington state, Mount St. Helens is notorious for its eruption on May 18, 1980. The eruption of stratovolcano led to earthquakes and a massive landslide. University ...
Prior to 1980, Spirit Lake consisted of two arms that occupied what had been the valleys of the North Fork Toutle River and a tributary. About 4,000 years ago, these valleys were blocked by lahars and pyroclastic flow deposits from Mount St. Helens to form the pre-1980 Spirit Lake. The longest branch of Spirit Lake was about 2.1 miles (3.4 km ...
More than 400 earthquakes have been detected beneath Washington's Mount St. Helens in recent months, though there are no signs of an imminent eruption, according to the U.S. Geological Survey.