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 …
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 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 …
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: 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 …
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 …
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 …
The Mount St. Helens deadly eruption was 45 years ago - EarthSky
On May 18, 1980, Mount St. Helens underwent a catastrophic and deadly eruption, triggering the largest landslide ever recorded. Earlier in the year, thousands of small earthquakes, venting …
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 …
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 …