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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.
Because the 2002 Denali Fault earthquake occurred on a strike-slip fault, like the San Andreas Fault, it offers a realistic example of effects likely to accompany the next major earthquake in California. The Denali Fault quake is similar to three earthquakes that ruptured the San Andreas Fault in the past few centuries.