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 | Britannica
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 …
Footage of the 1980 Mount St. Helens Eruption - YouTube
On May 18, 1980, the Mount St. Helens became the largest and most destructive volcanic eruption in U.S. history. By the end of its cycle of fire and fury, 57 people had died.
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....
Why ash from catastrophic 1980 Mount St. Helens eruption is …
Sep 17, 2025 · Mount St. Helens erupted on May 17, 1980, in a devastating blast that produced the biggest landslide on record and is considered the most economically destructive volcanic …
Mt. St. Helens' Devastating Eruption—And Surprising Rebound
May 9, 2025 · Ash covers the landscape on Mount St. Helens north face, taking off the top of the mountain and triggering an eruption that killed 57 people, wiped out river valleys and flattened …
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 …
Mount St. Helens 40th Anniversary — The 1980 Eruption
Forty years ago, on May 18th, 1980, Mount St. Helens produced the largest observed eruption in the coterminus United States. This eruption had profound impacts on human life and the …
What scientists have learned from Mount St. Helens’ devastating ...
May 18, 2025 · It was 45 years ago today that Mount St. Helens, a volcano 50 miles north of Portland, Oregon exploded in a spectacular and devastating eruption. It triggered the biggest …