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On May 18th 1980.
Mt St Helens first erupted on May 18, 1980
The most devastating eruption was on May 18th 1890.
FALSE
It killed animals and stuff. And people. Look at wikipedia.
fireweed
The last eruptive activity of Mount St Helens was in July of 2008.
The 1980 eruption of Mount St. Helens.
The eruption of Mount St. Helens in 1980 was triggered by a combination of magma rising towards the surface, increasing pressure in the volcano, and a sudden release of built-up gases. This led to a flank collapse on the north side of the volcano, resulting in a massive eruption that devastated the surrounding area.
Mt. Saint Helens is located on the North American continent.
yes, Mt Saint Helens is a volcano. located in Skamania County, Washington
The eruption of Mount St. Helens in 1980 was relatively short, lasting for about nine hours. However, the effects of the eruption, including the eruption column and pyroclastic flows, had long-lasting impacts on the surrounding area.