Cascadia Fault Zone

The state of Oregon has set an ambitious goal to prepare more families in earthquake country to be "two weeks ready" after a disaster. Washington's emergency management agency is also seeking more funding to prepare people in a similar way.

Earthquake researchers are eager to dig into a trove of new data about the offshore Cascadia fault zone. When Cascadia ruptures, it can trigger a megaquake known as "the Big One." The valuable new imaging of the geology off the Oregon, Washington and British Columbia coasts comes from a specialized research vessel.

Residents living on the West Coast don't know when the next earthquake will hit. But a new expansion of the U.S. earthquake early warning system gives 50 million people in California, Oregon — and now Washington — seconds to quickly get to safety whenever the next one hits.

Smartphone users who opted in to a test of the West Coast earthquake early warning system got an early taste on Thursday of what is to come. Mobile phones from Seattle to Olympia blared with an alarm for imaginary incoming shaking. The earthquake warning system -- already operational in California -- will launch for the general public in Oregon on March 11 and statewide in Washington in May.

The work by researchers at Portland State University and the University of Oregon, published in the Bulletin of the Seismological Society of America, offers a solution to a common problem that arises when using radiocarbon dating to determine the past activity of faults.

Unlike the Cascadia Subduction Zone, the faults in eastern Washington are in the upper crust, (the outermost layer of the earth). That means they’re closer to the surface and to communities. They may not produce as large of an earthquake as the subduction zone off the coast, but the earthquakes these inland faults can produce could significantly damage infrastructure in nearby communities.

Scientists found nine to eleven instances over roughly the last 3,000 years where a Cascadia earthquake seems to have triggered a San Andreas quake. The vast majority of great Cascadia quakes during that period have a correlation on the San Andreas Fault.

The state of Oregon is pushing the community hospitals along the Oregon Coast to improve their earthquake resilience. This comes after a state report predicted none of them would be able to sustain operations after the feared Big One -- a magnitude 9 offshore Cascadia earthquake and tsunami.

Emergency managers say a lot of the burden for eastern Washington and Inland Northwest communities will come from having to help house and provide services for people who will be displaced from western Washington following the aftermath of a potential large-scale earthquake.

Information on earthquake drill set for October 17, 2019 at 10:17am. Also how to prepare emergency kits.