Cascadia’s Locked Fault Means Massive Earthquake Is Due in Pacific Northwest: Seismologist


http://earthchangesmedia.com/cascadias-locked-fault-means-massive-earthquake-is-due-in-pacific-northwest-seismologist
The Cascadia fault in the Pacific Northwest is locked up, meaning that a massive megathrust earthquake could occur at any time, seismologists are warning.
“It’s impossible to know exactly when the next Cascadia earthquake will occur,” said Evelyn Roeloffs of the U.S. Geological Survey, speaking l…

The Cascadia fault in the Pacific Northwest is locked up, meaning that a massive megathrust earthquake could occur at any time, seismologists are warning.

“It’s impossible to know exactly when the next Cascadia earthquake will occur,” said Evelyn Roeloffs of the U.S. Geological Survey, speaking last year on the 313th anniversary of a massive quake that hit in 1700—the last major one in the region. “We can’t be sure that it won’t be tomorrow, and we shouldn’t make the mistake of assuming we have decades to prepare.”

The tectonic plates normally glide and rub against each other, but periodically they become wedged together. When the fault quits sliding and becomes “locked” in place, it builds energy until it finally ruptures, relieving hundreds or thousands of years of stored-up stress in seconds, Roeloff said.

Now, earthquake scientists from Canada and the U.S. who monitor seismic activity along the Cascadia coast have concluded that the dangerous fault line is fully locked, which carries serious implications for an earthquake in the Pacific Northwest.

“What is extraordinary is that all of Cascadia is quiet,” University of Oregon geophysics professor Doug Toomey told the Associated Press earlier this month.

Research on the Cascadia Subduction Zone in 2012 and 2013 led researchers to similar conclusions.

A big unknown, Toomey told AP, is how much strain has accumulated since the plate boundary seized up, and how much more strain can build up before the fault rips and unleashes a possible magnitude 9.0 megaquake and tsunami.

“If there were low levels of offshore seismicity, then we could say some strain is being released by the smaller events,” Toomey told AP. “If it is completely locked, it means it is increasingly storing energy, and that has to be released at some point.”

Toomey said he is “very concerned” and said it is imperative that people in the Northwest continue to prepare for a big earthquake.

Cascadia’s Subduction Zone is a very long, very dangerous undersea fault that divides the Juan de Fuca oceanic and the North America continental plates. It runs from British Columbia down through Washington and Oregon and into northern California, as does a volcanic mountain range.

The fault has produced at least seven magnitude 9.0 or greater megathrust earthquakes in the past 3,500 years, a frequency that indicates a return time of 300 to 600 years.

The massive earthquake on the night of January 26, 1700, was one of the world’s largest. The Cascadia fault ruptured along a 680-mile stretch, from the middle of Vancouver Island to northern California, producing tremendous shaking and a huge tsunami that swept across the Pacific.

The oral history of the Makah Tribe in Washington tells of a huge earthquake that happened in the middle of the night long ago. Those who had heeded their elder’s advice to run for high ground survived. After spending a cold night in the hills with animals that also had fled the rushing waters, the survivors found that their village, along with neighboring coastal villages, had completely washed away, leaving no survivors.

The massive earthquake on the night of January 26, 1700, was one of the world’s largest. The Cascadia fault ruptured along a 680-mile stretch, from the middle of Vancouver Island to northern California, producing tremendous shaking and a huge tsunami that swept across the Pacific.

The oral history of the Makah Tribe in Washington tells of a huge earthquake that happened in the middle of the night long ago. Those who had heeded their elder’s advice to run for high ground survived. After spending a cold night in the hills with animals that also had fled the rushing waters, the survivors found that their village, along with neighboring coastal villages, had completely washed away, leaving no survivors.

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About Earth Changes Media w/ Mitch Battros

Mitch Battros is a scientific journalist who is highly respected in both the scientific and spiritual communities due to his unique ability to bridge the gap between modern science and ancient text. Founded in 1995 – Earth Changes TV was born with Battros as its creator and chief editor for his syndicated television show. In 2003, he switched to a weekly radio show as Earth Changes Media. ECM quickly found its way in becoming a top source for news and discoveries in the scientific fields of astrophysics, space weather, earth science, and ancient text. Seeing the need to venture beyond the Sun-Earth connection, in 2016 Battros advanced his studies which incorporates our galaxy Milky Way - and its seemingly rhythmic cycles directly connected to our Solar System, Sun, and Earth driven by the source of charged particles such as galactic cosmic rays, gamma rays, and solar rays. Now, "Science Of Cycles" is the vehicle which brings the latest cutting-edge discoveries confirming his published Equation.
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