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Morocco and Eastern Atlantis

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Bianca
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« Reply #720 on: February 22, 2008, 04:04:23 pm »









"The Cascadia Subduction Zone off the state of Washington threatens British Columbia,
Washington, Oregon and the northern California coastlines," Synolakis says.

"Southern California, because of its population density and offshore topography, is also
threatened. It would not take a large tsunami to cause a disaster here, where hundreds
of thousands of people are often at the beach. If you're at the beach and feel an earth-
quake, you should move to higher ground as quickly as possible."

Synolakis relates some of the New Guinea survey findings:

"A 7.0 earthquake, with the epicenter significantly inland, occurred shortly after sundown
and was followed 20 minutes later by a 5.9 aftershock. We think the initial quake triggered
a landslide on the sea floor, probably on the order of four or five cubic kilometers. The wave
arrived onshore 5 to 10 minutes after the initial quake.

"Two large tidal waves were followed by a third and smaller wave. Initially no more than
two or three meters high, the waves gained height as they raced over steeply decreasing
depths toward the shore.

"On touching land, the largest waves were 10 to 14 meters (32 to 46 feet) high at the
center (the maximum height fell off significantly a short distance from each wave's center)
and 20 kilometers (12 miles) long. The mass of water in each wave extended back from the
crest as far as four kilometers (2.5 miles).

"The water surged over the peninsula at an estimated speed of 10 to 20 meters per second,
or 22 to 44 miles per hour. This force induced by the tsunami current is 1,000 times greater
than the force of a wind of the same speed."
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