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Washington State Earthquake History. Major earthquakes in Washington since 1880 (source: USGS) On December 14, 1872, a strong earthquake in the Cascade Mountains caused damage at Victoria, British Columbia, and Seattle. It was felt over a very large area, about 390,000 square kilometers, extending as far south as Eugene, Oregon, and north into British Columbia, probably even into Alaska.
One source notes, The magnitude of the two events cannot have differed greatly.. A strong earthquake occurred on the Hayward Fault, the principal active branch of the San Andreas in central California, in October 1868.Some 30 persons were killed in the region. Damage was severe at San Francisco; many buildings were wrecked at Hayward and San Leandro.ne source notes, The magnitude of the two events cannot have differed greatly.. A strong earthquake occurred on the Hayward Fault, the principal active branch of the San Andreas in central California, in October 1868.