August 30, 2011
The 5.8-magnitude earthquake that rattled the East Coast last Tuesday continues to produce aftershocks near its Virginia epicenter.
The U.S. Geological Survey says there have been at least 18 aftershocks ranging in magnitude from 4.5 to as little as 2.0, following the strongest earthquake to strike the East Coast since World War II.
The latest two occurred late Monday.
Aftershocks are usually felt in a smaller area than the original earthquake and can occur for weeks and possibly months.
Geophysicist Amy Vaughan with the National Earthquake Information Center in Colorado says the size and number of tremors are in line with expectations.
She also says because of the geography and landscape of the area, the aftershocks are being more widely felt than they would in places like the West Coast.
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