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On March 27, 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 summit and escalated until a major explosive eruption took place on May 18, 1980, at 8:32 am.
"The 1980 Mount St. Helens Eruption". Archived from the original on 14 July 2014. Mount St Helens (audio slideshow). Archived from the original on 14 July 2014. Volcanologist Sarah Henton discusses the Cascade Mountains and explains the geology and impact of the 1980 Mount St Helens eruption. (duration 6:29 min) Mount St. Helens (3D model).
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Seismologists hadn't monitored earthquake activity in the Mount St. Helens area until seismometers were installed near the volcano in 1972, and from January 1975 through early 1980, only 44 ...
May 18, 2018, marks 38 years since Mount St. Helens erupted in Washington State, killing 57 people.
View the Mount St. Helens Fast Facts on CNN and learn more about the volcano in Washington.
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In the weeks leading up to the eruption of Mount St. Helens, Landsburg visited the area many times in order to photographically document the changing volcano. [6] On the morning of May 18, he was within a few miles of the summit. When the mountain erupted, Landsburg retreated to his car while taking photos of the rapidly approaching ash cloud. [7]