Future US, Inc. 11 West 42nd Street, 15th Floor, Cascadia is America's own tectonic version of Sumatra, where the magnitude 9.3 earthquake and tsunami of 2004 occurred.

The Next Cascadia Earthquake: Worst Case Scenario - YouTube Please deactivate your ad blocker in order to see our subscription offerCircles mark recently measured seismic activity along the Pacific Northwest coast. The Juan de Fuca, a small oceanic plate, is being driven under the North American plate, atop which the continental U.S. sits.Subduction systems – where one tectonic plate slides over another – are capable of producing the world’s largest known earthquakes. The last major quake rumbled up the coast in 1700, with an estimated magnitude of 8.7 to 9.2.However, big quakes along the southern part of the fault could strike more frequently, appearing every 300 years, the new research suggests.To understand these massive quakes and how frequently they emerge, the scientists with the Cascadia Recurrence Project Team (CRPT) are investigating traces left behind Despite having lots of evidence from past quakes, "interpretation of our observations don't always agree," Gomberg said.By analyzing many avenues of evidence together, CRPT scientists are hoping to identify where the divergence in recurrence estimates originated and to reconcile those disagreements, Gomberg said. The Cascadia subduction zone is a region where two tectonic plates are colliding. Devastating Cascadia megaquakes may rock the Pacific Northwest more frequently than previously suspected.A new effort to systematically analyze geologic evidence, such as rocks and soil dumped into the ocean by ancient and powerful quakes, hints that the time between massive earthquakes may be up to 200 years shorter than previously thought, according to research presented on May 16 at the annual meeting of the The higher frequency of megaquakes could spell trouble for infrastructure in the region, which may not be adequately prepared to withstand their power.
Stretching off the Pacific shore from northern California some 1300 kilometers to the tip of Vancouver Island, the Cascadia subduction zone appears capable of its own magnitude 9 earthquake. © Centuries pass before the plates finally build up enough pressure to slip past each other, and the sudden, cataclysmic release triggers what is known as a "megathrust" earthquake, according to the The geologic record suggests that the fault has produced catastrophic quakes of magnitude 8.0 to 9.0, along with destructive tsunamis, at least every 500 years or so. The longer the Cascadia subduction zone goes without a major earthquake, the more the odds increase that it will happen soon. The 1700 Cascadia earthquake occurred along the Cascadia subduction zone on January 26 with an estimated moment magnitude of 8.7–9.2. In 2010, geologists predicted a 37 percent chance of an M8.2+ event within 50 years, and a 10 to 15 percent chance that the entire Cascadia subduction zone will rupture with an M9+ event within the same time frame.A 2004 study revealed the potential for relative mean The confirmation of their oral traditions about a great earthquake has led many aboriginal groups in the area to initiate projects to relocate their coastal communities to higher and safer ground in preparation for the predicted next earthquake. "Adding these earthquakes into our recurrence calculations could change our estimates of likely ground shaking by about 40 percent," Joan Gomberg, a seismologist with the U.S. Geological Survey (USGS), said Along North America's Pacific Northwest coast lies the Cascadia fault, also known as the Cascadia subduction zone (CSZ). Please refresh the page and try again.Live Science is part of Future US Inc, an international media group and leading digital publisher. You will receive a verification email shortly.There was a problem. Devastating Cascadia megaquakes may rock the Pacific Northwest more frequently than previously suspected.

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