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This Happened — May 18: When Mount St. Helens Erupted

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Updated May 18, 2024 at 11 a.m.

The volcano Mount St. Helens erupted on this day in 1980, in the state of Washington, United States.

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What caused the eruption of Mount St. Helens?


The eruption of Mount St. Helens was caused by a combination of geological factors, including the movement of tectonic plates, the buildup of magma beneath the volcano, and the presence of a large ice cap on the mountain.

What was the impact of the eruption of Mount St. Helens?


The eruption of Mount St. Helens had a devastating impact on the surrounding area. The blast and subsequent landslide destroyed forests, buildings, and roads, and caused widespread devastation in the region. It also created a massive ash cloud that reached as far as Montana and affected air traffic across the United States.

How many people died during the eruption of Mount St.Helens?


There were 57 deaths from the eruption, including volcanologists, loggers, and tourists who were in the vicinity of the mountain at the time of the eruption.

Is Mount St. Helens still an active volcano today?


Mount St. Helens is still an active volcano, and it remains closely monitored by volcanologists and other scientists. However, it has not erupted again since 2008, and the risk of another major eruption in the near future is considered low.


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