The last time the Cascadia Subduction Zone caused a major earthquake and tsunami was in 1700.
SEATTLE — Friday marks the anniversary of the last major earthquake in the Pacific Northwest when the Cascadia Subduction Zone went off 324 years ago.
Since then, Washington has seen smaller earthquakes, such as the magnitude 6.8 Nisqually quake in 2001, but nothing like the one caused by the Cascadia Subduction Zone.
On January 26, 1700, at 9 p.m., the fault that locks the ocean floor to the North American Plate slipped and caused an earthquake so big it created a tsunami on the west side of the
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