Pharos-Tribune

Opinion

November 29, 2013

PETERS: Shake, rattle and roll — the big one's coming

“It’s 8:16 on a chilly, wet morning … You’ve just arrived at work and are pouring a cup of coffee when you become aware of a low rumbling noise. Within seconds, the rumbling becomes a roar, the floor beneath you heaves, and the building begins to pitch and shake so violently that you’re thrown to the floor. The roaring is joined by a cacophony of crashing as windows shatter and every unsecured object in the room – from the desk chair to the coffee pot – is sent flying. Shaken loose by the shuddering and jolting of the building, dust and ceiling particles drift down like snow. Then the lights flicker and go out.”

That’s the arresting start of a new report produced by several governmental agencies that describes what can happen when a magnitude 9.0 earthquake hits what’s called the Cascadia Region, an area that stretches from the coast of northern California northward through western Oregon, Washington, and southwestern British Columbia. The quake will be triggered by movement along the faults that lie between the oceanic tectonic plates and the plate on which North America rides. When the plates move suddenly, absolutely enormous amounts of energy are released, with violent shaking of the ground and tsunamis as the result. The report that describes all this is Cascadia Subduction Zone Earthquakes: A Magnitude 9.0 Earthquake Scenario.

Cascadia isn’t the only place in danger of having major earthquakes. Most famously, the San Andreas and associated faults in California are a constant threat to local residents. And the New Madrid fault zone, centered where the states of Missouri, Kentucky, and Tennessee come together, is a threat to the lower Midwest. Finally, states as different as South Carolina and Alaska also run the risk of significant earthquakes. In short, the U.S. has a number of regions where enormous amounts of energy can be released over the span of just seconds, with resulting damage to buildings, roads, power lines and pipelines.

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