Earthquake, aftershock rattles nerves as residents cope with winter storm

A small earthquake centered in South Carolina gave Barnwell County residents the shakes Friday night.
The United States Geological Survey reported a 4.1 magnitude earthquake happened at 10:23 p.m. and was centered about 7.5 miles west-northwest from the town of Edgefield -- about 50 miles northwest of Barnwell.
People took to social media, especially Facebook and Twitter, to ask about and confirm the earthquake. Houses in Barnwell shook gently for a few seconds.
The quake was felt by people more than 100 miles away from its center. Yet, there were people who didn't feel anything and plenty who slept through the event.
A 4.1 magnitude earthquake is relatively small on the Richter scale, which is used to measure the size of a quake. The scale is measured in factors of 10, so a 5.0 magnitude earthquake is 10 times as large as a 4.0 magnitude one.
The earthquake was the largest in South Carolina since November 2002, when a 4.4 magnitude earthquake happened near Charleston.
Another earthquake, an aftershock from the first one, was reported Sunday at 3:23 p.m. by the USGS with a magnitude of 3.2. It also was centered west of Edgefield.
The People-Sentinel has not heard any reports of damage in Barnwell County from the earthquakes.