Mount St. Helens, 1980 to now—what’s going on?
Fact Sheet
2013-3014, version 1.1
U.S. GEOLOGICAL SURVEY and the U.S. FOREST SERVICE—OUR VOLCANIC PUBLIC LANDS
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Abstract
Mount St. Helens seized the world’s attention in 1980 when the largest historical landslide on Earth and a powerful explosive eruption reshaped the volcano, created its distinctive crater, and dramatically modified the surrounding landscape. An enormous lava dome grew episodically in the crater until 1986, when the volcano became relatively quiet. A new glacier grew in the crater, wrapping around and partly burying the lava dome. From 1987 to 2003, sporadic earthquake swarms and small steam explosions indicated that magma (molten rock) was being replenished deep underground. In 2004, steam-and-ash explosions heralded the start of another eruption. A quieter phase of continuous lava extrusion followed and lasted until 2008, building a new dome and doubling the volume of lava on the crater floor. Scientists with the U.S. Geological Survey and University of Washington’s Pacific Northwest Seismograph Network maintain constant watch for signs of renewed activity at Mount St. Helens and other Cascade volcanoes. Now is an ideal time for both actual and virtual visitors to Mount St. Helens to learn more about dramatic changes taking place on and beneath this active volcano.
Suggested Citation
Dzurisin, D., Driedger, C.L., Faust, L.M., 2013, Mount St. Helens, 1980 to now—what’s going on? (Originally posted on April 23, 2013; Revised May 28, 2013): U.S. Geological Survey Fact Sheet 2013-3014, version 1.1, Report: 6 p.; Videos folder: 6 video links; Transcripts folder, https://doi.org/10.3133/fs20133014.
ISSN: 2327-6932 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Mount St. Helens, 1980 to now—what’s going on? |
| Series title | Fact Sheet |
| Series number | 2013-3014, version 1.1 |
| DOI | 10.3133/fs20133014 |
| Edition | Originally posted on April 23, 2013; Revised May 28, 2013 |
| Year Published | 2013 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Cascades Volcano Observatory, Volcano Science Center |
| Description | Report: 6 p.; Videos folder: 6 video links; Transcripts folder |
| Country | United States |
| State | Washington |
| Other Geospatial | Mount St. Helens |
| Online Only (Y/N) | Y |
| Additional Online Files (Y/N) | Y |