Today in Earthquake History

Today's Earthquake Fact:
The term seismic seiche was first coined by Anders Kvale in 1955, to describe oscillation of lake levels in Norway and England caused by the Assam earthquake of August, 1950.

Year at a Glance

October

Note: All earthquake dates are UTC, not local time.

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Year	Location	Magnitude	Comment

1983	Borah Peak, Idaho	6.9	The largest historical earthquake in Idaho. Two people killed, two injured, and considerable damage at Challis. One person injured and extensive damage at Mackay. Maximum intensity VII in the Challis-Mackay area. Total damage from the earthquake estimated at 15 million dollars. System of fault scarps extending for more than 35 kilometers with vertical displacement up to 2.7 meters observed between Mackay and Challis. Landslides, rockfalls and groundwater changes occurred throughout the region, including changes to geyser activity in Yellowstone National Park. The earthquake was felt in Idaho, Washington, Montana, Oregon, Nevada, Wyoming, Utah, and parts of Canada.

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