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Geologic structure and rock properties on the East Coast allow seismic waves to travel farther without weakening compared with the West Coast, Harp said. He said equations used to predict ground shaking might need to be revised now that scientists know more about the power of East Coast earthquakes. The information also will help with building codes as well as emergency preparedness, the USGS said. While West Coast earthquake veterans scoffed at what they viewed as only a moderate temblor, the August 2011 quake changed the way officials along the East Coast viewed emergency preparedness. Emergency response plans that once focused on hurricanes, tornadoes, flooding and snow are being revised to include quakes. Some states have enacted laws specifically related to the quake, and there is anecdotal evidence of a spike in insurance coverage for earthquake damage. ___ Online: U.S. Geological Survey: http://www.usgs.gov/
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