1980 eruption of Mount St. Helens - Wikipedia
In March 1980, a series of volcanic explosions and pyroclastic flows began at Mount St. Helens in Skamania County, Washington, United States. A series of phreatic blasts occurred from the …
Mount Saint Helens | Location, Eruption, Map, & Facts ...
Nov 26, 2025 · Mount Saint Helens, volcanic peak in the Cascade Range, southwestern Washington, U.S. Its eruption on May 18, 1980, was one of the greatest volcanic explosions …
1980 Cataclysmic Eruption | U.S. Geological Survey - USGS.gov
Nov 7, 2023 · On March 16, 1980, the first sign of activity at Mount St. Helens occurred as a series of small earthquakes. On March 27, after hundreds of additional earthquakes, the …
Mount St. Helens erupted 45 years ago: Here's what happened
On May 18, 1980, the United States experienced the deadliest and most destructive volcanic eruption in its history. After more than two months of rumbling, Washington state's Mount St....
Mount St. Helens Fact Sheet | Volcano World
On May 18, a violent eruption began when an earthquake triggered a giant landslide that removed the northern flank of Mount St. Helens. The blast, accompanied by hot gasses, pumice, and …
World of Change: Devastation and Recovery at Mt. St. Helens
Nov 24, 2025 · The devastation of the May 1980 eruption of Mt. St. Helens and the gradual recovery of the surrounding landscape is documented in this series of satellite images from …
Mount St. Helens: 45 years later, research remains vibrant
May 21, 2025 · Mount St. Helens erupted for 9 hours on May 18, 1980, in southwest Washington, destroying plant and animal life in the surrounding 230 square miles of forest and killing 57 …