Mount St. Helens levels 185 square miles of forestland. Skamania County, Washington. 1980.

Caption: Mount St. Helens levels 185 square miles of forestland. Thousands of trees knocked down by the atom bomb-like blast of the May 18, 1980, eruption of southern Washington state's Mount St. Helens volcano are shown in this photo taken near the mountain several weeks after the main eruption. According to U.S. Geological Survey scientists, the Cascade Mountain Range volcano's first eruption in 123 years leveled trees in a 185 square mile area and spewed about 1 cubic kilometer of ash and rock which fell over 11 western and central states. August 1980. PIO No. 80-180c