Picture Scramble # 22

3 August 2000

May 18, 1980. On that fateful day, Mount St. Helens Volcano in Washington exploded violently after 2 months of intense earthquake activity and intermittent, relatively weak eruptions, causing the worst volcanic disaster in the recorded history of the United States. The cataclysmic eruption and related events rank May 18th among the most significant geologic dates in the United States during the 20th century. (Courtesy of USGS)