Mount St. Helens National Volcanic Monument is a U.S. National Monument that includes the area around Mount St. Helens in Cowlitz, Lewis, and Skamania Counties, Washington. It was established by Congr
Mount St. Helens from the Johnston Ridge Observatory (July 2018)
Johnston Ridge Observatory
Science and Learning Center at Coldwater, 2024
The "Meatball", a lava ball wedged in a ceiling channel. Lava balls form around smaller rocks that roll along in lava flows.
On May 18, 1980, at 8:32 a.m., Mount St. Helens in Skamania County, Washington, United States, experienced a catastrophic explosive eruption which had a volcanic explosivity index of 5. It was the fir
Mount St. Helens National Volcanic Monument
…the area around Mount St. Helens in Cowlitz, Lewis, and Skamania Counties, Washington. It was established by Congress on August 27, 1982, following the 1980 eruption. The 110,000 acre (445 km2) National Volcanic Monument was set aside for research, recreation, and education. Inside the monument, the environment is…
The eruption column, May 18, 1980
Photo showing the bulge growing due to a cryptodome on April 27
Lakes nearest to Mount St. Helens have been partly covered with fallen trees since the eruption. This photograph was taken in 2012.
The North Fork Toutle River valley filled with landslide deposits