|English: illustration of the cycle of preparedness activities for emergency management (Photo credit: Wikipedia)|
At about 21:00 (9PM) on January 26, 1700 the last 1700 Cascadia earthquake occurred along the Cascadia subduction zone (Fault) ~ with an estimated moment magnitude of 8.7–9.2. The megathrust earthquake involved the Juan de Fuca Plate that underlies the Pacific Ocean, from mid-Vancouver Island in British Columbia, Canada, south along the Pacific Northwest coast as far as northern California. The length of the fault rupture was about 1,000 kilometers (620 miles) with an average slip of 20 meters (66 ft).
The earthquake caused a tsunami that struck the coast of Japan and British Columbia, Washington, Oregon and Northern California, overwhelming many coastal Japanese and North American First Nation communities.