Image:St Helens April 10, 1980.jpg
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On March 20, 1980, after a quiet period of 123 years, earthquake activity once again began under the Mount St. Helens volcano. Seven days later, on March 27, small phreatic (steam) explosions began. This USGS/CVO photograph was taken from the northeast on April 10, 1980. By Donald A. Swanson.
Template:PD-USGov-Interior-USGS [1] (http://vulcan.wr.usgs.gov/Volcanoes/MSH/SlideSet/ljt_slideset_old.html)
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