Word: cascadia
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...Indian Ocean - which killed nearly a quarter million people - led to plans to beef up the number of monitoring buoys in the Pacific. The buoys can provide up to six hours' warning, says Nicolini, if the waves are coming from far across the ocean. But an earthquake in the Cascadia Subduction zone just off the Pacific Northwest could create tsunami-size waves within five minutes. "You'd feel that kind of an earthquake on land," Nicolini says. "If you do, start running to higher ground" - at least 40 feet above sea level. For residents of low-lying places, says Nicolini...
...Seattle tsunami? If a Cascadia quake were large enough, it could drive a wall of water toward Seattle and Vancouver. The Puget Basin has its own network of faults fully capable of generating large earthquakes and tsunamis...
...Cascadia has been relatively quiet ever since--which can be interpreted as good news or bad, given a geological record showing that the time between Cascadian tsunamis ranges from 200 to 1,000 years. Canadian geophysicists are still puzzling over a series of rhythmic tremors they identified a couple of years ago beneath the floor of Puget Sound. They don't know what caused them, but they think the tremors may be associated with rising stress along the fault. A bit of subterranean rustling doesn't mean that a great earthquake is imminent, of course, but the tsunami warning signs...
...EARTHQUAKE FACTORY The Cascadia Subduction Zone???where the Juan de Fuca Plate meets the North American Plate???is remarkably similar to the subterranean system that triggered the tsunami in the Indian Ocean and is capable of generating equally powerful earthquakes and equally destructive waves Some key differences: a tsunami???warning system, better housing construction and a more rugged and less populous coastline. The death toll from a tsunami in the Pacific Northwest might be in the hundreds but not in the tens of thousands...
...HAPPENED BEFORE Geological and historical evidence points to a giant Cascadia earthquake that sent a tsunami across the Pacific in January...