Located in the Gifford Pinchot National Forest in Skamania County, Washington, Mount St. Helens is a stratovolcano and part of the Pacific Ring of Fire, an area known for earthquakes and volcanic eruptions.
On Sunday, May 18, 1980 at 8:32 a.m. Pacific Time, Mount St. Helens erupted. An earthquake measuring 5.1 on the Richter scale preceded the eruption. The eruption lasted nine hours, causing landslides and mudslides, along with the devastation of the forests, lands, vegetation, wildlife, residences and roads in the area. In addition, volcanic ash dust traveled across 11 states and even some areas of Canada several days after the eruption. A total of 57 people lost their lives. After the Mount St. Helens Eruption, the United States Army Corps Engineers began recovery and construction efforts.
In August 1982, the United States Congress passed the Mount St. Helens National Volcanic Monument Act. The act was signed into law by President Ronald Reagan, officially establishing the Mount St. Helens National Volcanic Monument where the public could visit the area and for scientists to conduct research.
In May 2025, the United States Geological Survey Library commemorated the 45th anniversary of the volcano’s eruption with a special exhibit at the United States Geological Survey National Center in Reston, Virginia.
The Indiana State Library has several titles in its federal documents collection relating to the Mount St. Helens Eruption:

“Observation of the Eruptions of July 22 and August 7, 1980, at Mount St. Helens, Washington.” ISLM I 19.16:1335

“Disaster Assistance Pacific Northwest – Mount Saint Helens Eruption, Fiscal Year 1980: Senate Hearings Before the Committee on Agriculture, 96th Congress, First Session.” ISLM Y 4.AP 6/2:D 63/7 1980 and “Mount Saint Helens National Volcanic Area Act of 1982: Hearings … Committee on Energy and Natural Resources, United States Senate, 97th Congress, Second Session … Washington, D.C., March 12, 1982; Kelso, Wash., April 7, 1982.” ISLM Y 4.EN 2:97-93
Here are transcripts of additional hearings on the eruption of Mount St. Helens:
“Mount St. Helens Impact: Hearing Before the Committee on Commerce, Science, and Transportation, United States Senate, 96th Congress, Second Session … June 13, 1980.” ISLM Y 4.C 73/7:96-108
“Mount St. Helens National Volcanic Monument Completion Act: Hearing … Committee on Energy and Natural Resources, United States Senate, 100th Congress, First Session … October 29, 1997.” ISLM Y 4.EN 2:9S. HRG. 105-377
Other historical societies and government agencies have online resources about the eruption:
Footage of the Mount St. Helens Eruption via the Smithsonian Channel
Mount St. Helens Erupts and USACE Responds
United States Army Corps of Engineers
Mount St. Helens National Volcanic Monument
United States Forest Service
The Volcanoes of Lewis and Clark: Mount St. Helens, Washington Summary United States Geological Survey
“What Was Lost: Reminiscences of the 1980 Eruption of Mount St. Helens”
by Sarah Stroman, Oregon Historical Society
“World of Change: Devastation and Recovery at Mt. St. Helens”
National Aeronautics and Space Administration (NASA)
This blog post was written by Michele Fenton, monographs and federal documents catalog librarian.

























