Name: St. Helens 2004 eruption
Channel: TEGNA
Description: Mount St. Helens On March 20, 1980, Mount St. Helens experienced a magnitude 4.2 earthquake and, on March 27, steam venting started. By the end of April, the north side of the mountain had started to bulge. On May 18, a second earthquake, of magnitude 5.1, triggered a massive collapse of the north face of the mountain. It was the largest known debris avalanche in recorded history. The magma in St

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St. Helens 2004 eruption

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Creator TEGNA

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Description

Mount St. Helens On March 20, 1980, Mount St. Helens experienced a magnitude 4.2 earthquake and, on March 27, steam venting started. By the end of April, the north side of the mountain had started to bulge. On May 18, a second earthquake, of magnitude 5.1, triggered a massive collapse of the north face of the mountain. It was the largest known debris avalanche in recorded history. The magma in St

Station

KING

Keywords

Mount St. Helens earthquake Volcano Eruption pyroclastic magma

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