did the mount erupt in the year 1980?
Yes.
Mount St. Helens
Mount St. Helens is most notorious for its major eruption on May 18, 1980,
who was harry r. truman? He was an American businessman, bootlegger, and prospector. when was he born? October 1896. where is he from? He lived near Mount St. Helens. where is this mount located? Skamania County, Washington, in the Pacific Northwest region of the United States. is it a volcanic mount? Yes. has it ever erupted? Yes. during which period did the mount erupt the first time? The "Ape Canyon Stage". did any tribe live near or on this mount? UNANSWERABLE
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Mount St. Helens [SEP] Introduction
This volcano is well known for its ash explosions and pyroclastic flows. Mount St. Helens is most notorious for its major eruption on May 18, 1980, the deadliest and most economically destructive volcanic event in US history. Fifty-seven people were killed; 250 homes, 47 bridges, of railways, and of highway were destroyed. A massive debris avalanche, triggered by an earthquake of magnitude 5.1, caused a lateral eruption that reduced the elevation of the mountain's summit from to , leaving a wide horseshoe-shaped crater. The debris avalanche was up to in volume. The Mount St. Helens National Volcanic Monument was created to preserve the volcano and allow for the eruption's aftermath to be scientifically studied.