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The Cascadia subduction zone is a 960 km (600 mi) fault at a convergent plate boundary, about 100–200 km (70–100 mi) off the Pacific coast, that stretches from northern Vancouver Island in Canada to Northern California in the United States.
For decades, scientists have warned about the potential of the Cascadia Subduction Zone, a megathrust fault that runs offshore along the coast from northern Vancouver Island to Cape Mendocino ...
The 1700 Cascadia earthquake occurred along the Cascadia subduction zone on January 26, 1700, with an estimated moment magnitude of 8.7–9.2. The megathrust earthquake involved the Juan de Fuca plate from mid- Vancouver Island , south along the Pacific Northwest coast as far as northern California .
The boundary between the two is known as the megathrust, or the Cascadia subduction zone, fault. “That plate-boundary fault is normally locked, and stresses build up, and then when it lets go ...
The Cascadia subduction zone is capable of producing megathrust earthquakes on the order of MW 9.0. Due to the relative plate motions, the triple junction has been migrating northwards for the past 25–30 million years, and assuming rigid plates, the geometry requires that a void, called slab window, develop southeast of the MTJ. [4]
It is where three tectonic plates meet and the Northwest’s Cascadia subduction zone and California’s San Andreas Fault system meet. The quake itself occurred on the Mendocino fault zone.
On Jan. 26, 1700, an earthquake on the Cascadia fault caused the forest to lurch downward by more than 3 feet. Soon after, a tsunami perhaps 100 feet high barreled through at 20 or 30 mph.
And there was the catastrophic mega-tsunami of 1700, originating from a magnitude 9 earthquake over the Cascadia fault system, which runs offshore from Northern California to Vancouver Island for ...