[Geology2] Today in EQ History- The largest known EQ to have occurred in the lower 48 states

Cascadia Subduction Zone
1700 01 26
Magnitude ~9

This earthquake, the largest known to have occurred in the "lower 48" United States, rocked Cascadia, a region 600 miles long that includes northern California, Oregon, Washington, and southern British Columbia. The earthquake set off a tsunami that not only struck Cascadia's Pacific coast, but also crossed the Pacific Ocean to Japan, where it damaged coastal villages. Written records of the damage in Japan pinpoint the earthquake to the evening of January 26, 1700.

• The M9 Cascadia Megathrust Earthquake of January 26, 1700

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Posted by: Kim Noyes <kimnoyes@gmail.com>

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