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Chance of a Major WA Earthquake Possible, but How Big? | Tacoma News Tribune

2023-02-24 00:00:00

Running 43 miles long from east to west directly below Puget Sound, a weak point on the North American Tectonic Plate is quietly rumbling away. Two giant pieces of rock, separated by an ancient fracture, are pressed against one another, shifting and sliding in tandem. It's called the Seattle Fault Zone -- it passes directly under Seattle and follows approximately the same path as Interstate 90 -- and could one day be responsible for an earthquake resulting in massive destruction and death totals throughout Puget Sound. Harold Tobin, director of the Pacific Northwest Seismic Network and professor of Earth and space sciences at the UW, is quoted.

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