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 .

Cascadia is an unusual subduction zone; it has low levels of seismicity and has not generated a significant megathrust earthquake in historic times. For years, scientists debated whether the Cascadia Subduction Zone was even capable of generating large magnitude earthquakes.

2017年10月23日 · One of the worst nightmares for many Pacific Northwest residents is a huge earthquake along the offshore Cascadia Subduction Zone, which would unleash damaging and likely deadly shaking in coastal Washington, Oregon, British Columbia and northern California.

2024年8月28日 · New research on the Cascadia Subduction Zone shows it has a segmented fault structure, impacting earthquake predictions and preparedness strategies, potentially affecting building codes in vulnerable areas like Washington’s Olympic Peninsula.

2024年6月14日 · For the first time, NSF-funded researchers revealed a detailed look at the potential for a major earthquake off the coasts of southern British Columbia, Washington, Oregon and northern California. The new study characterizes the Cascadia Subduction Zone, which includes the "megathrust" fault, where the largest earthquakes initiate and spread ...

The chart shows all 40 major earthquakes in the Cascadia Subduction Zone that geologists estimate have occurred since 9845 B.C. Scientists estimated the magnitude and timing of each quake by...

The last known great earthquake in the northwest was the 1700 Cascadia earthquake, 325 years ago. Geological evidence indicates that great earthquakes (> magnitude 8.0) may have occurred sporadically at least seven times in the last 3,500 years, …

2024年6月24日 · A new study mapping the Cascadia Subduction Zone is giving scientists clues about the state of the fault line as the Pacific Northwest awaits a potentially catastrophic earthquake.

The Cascadia Subduction Zone is a 700-mile fault that runs from northern California up to British Columbia and is about 70-100 miles off the Pacific coast shoreline. There have been 43 earthquakes in the last 10,000 years within this fault.

The Earthquake and its Effects in Cascadia: When this earthquake occurred, the Cascadia region of North America (present day Vancouver Island, British Columbia, western Washington and Oregon and Northern California) was pretty much unknown to Europeans 2 , but it was by no means uninhabited.