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Researchers Study East Coast Tsunami Danger

November 29, 2005

Tsunamis • Researchers Study East Coast Tsunami Danger • Caution - Disaster Relief Scams Ahead • Tsunami Aid E-Mail May Contain Virus Attachment • Scams Interfere with Tsunami Charitable Efforts

Two University of Rhode Island researchers are working to identify potential flooding and damage that could occur along the East Coast if a tsunami struck the region.

Ocean engineering professors Stephan Grilli of Narragansett and Christopher Baxter of Cranston will study historical events and evaluate the risks and probabilities of a tsunami striking anywhere on the East Coast from the Carolinas to Maine.

The two have been awarded an $86,000 grant from FM Global, one of the world's largest commercial property insurers.

"FEMA [the Federal Emergency Management Agency] has worked on hazard maps for the West Coast and Hawaii for years, but none have been made for the East Coast," Grilli said. "That's partly because there is a lower risk for tsunamis in the Atlantic, but also because they're more complicated to predict."

A tsunami in the Pacific Ocean would likely be caused by an underwater earthquake that quickly raises or lowers part of the seafloor, according to Grilli, and the resulting wave created by such an event is relatively easy to predict.

Tsunamis in the Atlantic Ocean are more likely to be caused by underwater landslides near the continental shelf, and predicting how large a wave this would generate is more difficult, he said.

The two are particularly interested in an area off the New Jersey coast and another on the Grand Banks off Nova Scotia, where a major tsunami was triggered in 1929.

"An earthquake with a magnitude of 6.0 isn't strong enough to cause a tsunami, but it certainly could cause an underwater landslide that could cause a tsunami, and the earth has about 120 earthquakes of that size every day," Grilli said.

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