On May 18th...
M5.7 - Mount St. Helens area, Washington, 1980
This earthquake occurred only seconds before the explosion which began the eruption of Mount St. Helens volcano. This eruption and blast took 396 meters off the top of Mount St. Helens, killed 31 people, left 33 others missing and caused damage between $500 million and $2 billion U.S. dollars. Felt (V) at Yakima and (IV) in many parts of Washington and Oregon.
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