The Giant, Underestimated Earthquake Threat to North America

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The Giant, Underestimated Earthquake Threat to North America
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The enormous fault off the coast of the Pacific Northwest has been silent for three centuries. But after years of detective work, geologists have discovered that it canunleash mayhem on an epic scale.

A magnitude-9 earthquake hit the Tohoku region of northeastern Japan, triggering one of the most destructive tsunamis in a thousand years. The Japanese — the most earthquake-prepared, seismically savvy people on the planet — were caught off-guard by the Tohoku quake’s savage power. Over 15,000 people died.

Telephone poles whip back and forth as if caught in a hurricane. Power lines rip loose in a shower of blue and yellow sparks, falling to the ground where they writhe like snakes, snapping and biting. Lights go out and the telephone system goes down. The fault continues to rip all the way to Newport, Oregon, halfway up the state. The magnitude suddenly jumps to 8.6. A power surge blows a breaker somewhere east of town and feeds back through the system, throwing other breakers in a cascade that quickly crashes the entire grid in Oregon, Washington, and parts of California, Idaho, and Nevada. A brownout begins in six more western states. The wire line phone systems crash in lockstep.

Shock waves have been pummeling the Pacific Northwest for four minutes and thirty-five seconds now, and it still isn’t over. After 64 cycles, enough welds have cracked, enough concrete has spalled, enoughhave come unstuck that some towers begin to pancake. The same death spiral everyone saw in New York on 9/11 happens all over again. Smaller buildings, but more of them. Dozens of towers go down in the four northernmost of the affected cities.

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