March 1980 Magnitude 4.1 earthquake

1800’s Explosive Eruption
February 1, 1800
May 1980 Swelling North Face
May 13, 1980

March 1980 Magnitude 4.1 earthquake

Magnitude 4.1 earthquake signals reawakening. Eruption of ash and steam March 27, opening a 250-foot crater.

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