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Mount St. Helens is an active volcano in the Cascade Range, according to the U.S. Geological Survey. It erupted in 1980 after a 5.1-magnitude earthquake shook the area. It is about 75 miles ...
The 2023 South Coldwater Slide is a mudslide that occurred in May 2023 near Mt. St. Helens. The volume of debris, and subsequent destruction of a bridge, closed off Washington State Route 504 and access to the Mount St. Helens National Volcanic Monument .
Mount St. Helens showed significant activity on March 8, 2005, when a 36,000-foot (11,000 m) plume of steam and ash emerged—visible from Seattle. [43] This relatively minor eruption was a release of pressure consistent with ongoing dome building. The release was accompanied by a magnitude 2.5 earthquake.
The Mount St. Helens Visitor Center at Silver Lake, about 30 miles (48 km) west of Mount St. Helens and five miles (8 km) east of Interstate 5 (outside the monument), opened in 1987 by then-Vice President George H.W. Bush. The center was formerly operated by the U.S. Forest Service and has been operated by Washington State Parks since October 2007.
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.
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In March 1980, Mount St. Helens was struck by an earthquake swarm that indicated potential eruptive activity for the volcano, which had been dormant for over a century. [46] The Forest Service established a roadblock on SR 504 approximately 4 miles (6.4 km) west of Spirit Lake on March 28 because of potential avalanche risks. [47]
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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