Mount St. Helens erupted catastrophically on May 18, 1980 beginning at 8:32 a.m. USGS geologist Don Swanson photographed and filmed the eruption from about 9:30 a.m. to 12:30 p.m., documenting the rising ash column and ground-hugging pyroclastic density currents.
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Yellowstone Monthly Updates
Learn about interesting stories of Yellowstone, and the past month's volcanic activity from Mike Poland, Scientist-in-Charge at the Yellowstone Volcano Observatory (YVO).
Sounds of Yellowstone
Sounds of Yellowstone
The USGS Sounds of Yellowstone series lets you listen to the natural sounds of geysers, hot springs, and mudpots found through Yellowstone National Park in Wyoming, USA.
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Image of the Week
A weekly series from the USGS Earth Resources Observation and Science (EROS) Center highlighting satellite image(s) featuring striking changes to the Earth's surface.
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Mount St. Helens in eruption, May 18, 1980
Mount St. Helens erupted catastrophically on May 18, 1980 beginning at 8:32 a.m. USGS geologist Don Swanson photographed and filmed the eruption from about 9:30 a.m. to 12:30 p.m., documenting the rising ash column and ground-hugging pyroclastic density currents.
Mount St. Helens 1980 Ash Cloud as Seen From Space
Eruptive activity at Mount St. Helens captured the world’s attention on May 18, 1980 when the largest historical landslide on Earth and a powerful explosion reshaped the volcano. A volcanic ash cloud spread across the US in 3 days, and encircled the Earth in 15 days.
Eruptive activity at Mount St. Helens captured the world’s attention on May 18, 1980 when the largest historical landslide on Earth and a powerful explosion reshaped the volcano. A volcanic ash cloud spread across the US in 3 days, and encircled the Earth in 15 days.
John Wesley Powell, Canyon Geologist
Mauna Loa Volcano Hawaii -- 1930s Eruption (Part 1 of 5)
Part 1 of 5
Mauna Loa Volcano Hawaii -- 1930s Eruption (Part 2 of 5)
Part 2 of 5
Mauna Loa Volcano Hawaii -- 1930s Eruption (Part 3 of 5)
Part 3 of 5
Mauna Loa Volcano Hawaii -- 1930s Eruption (Part 4 of 5)
Part 4 of 5
Mauna Loa Volcano Hawaii -- 1930s Eruption (Part 5 of 5)
Part 5 of 5
1923 Survey of the Grand Canyon of the Colorado River in Arizona
The survey of the Grand Canyon of the Colorado River in Arizona. This survey, perhaps the most difficult ever undertaken by government engineers, was made to show the possibilities for development of power. Every feasible dam site was surveyed and the flow of all tributary streams was measured.
The survey of the Grand Canyon of the Colorado River in Arizona. This survey, perhaps the most difficult ever undertaken by government engineers, was made to show the possibilities for development of power. Every feasible dam site was surveyed and the flow of all tributary streams was measured.