A relatively rare East Coast earthquake centered just northeast of South Carolina’s capital city jolted large numbers of state residents awake early Monday, rocking the Southern state at a preliminary 3.3 magnitude, authorities said. The pre-dawn temblor lasted only seconds but a number of people took to social media to describe being shaken from sleep when the quake hit shortly after 1:30 a.m. A seismic analyst monitoring the quake for the USGS Geological Survey’s National Earthquake Information Center in Colorado, called it the latest in a series of shakes in recent months but stronger than usual. The epicenter was about 21 miles (3 kilometers) northeast of downtown Columbia, the capital city.
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