Flickr user Diego Diaz
Several people living in the Little River and surrounding areas reported multiple rumbles and booms late Thursday night. Some thought it was an explosion and others thought it might be an earthquake.
WMBF News took the story and dug into it today and didn't find an answer. Read their report here. None of the authorities are claiming knowledge of the booms and there's no reports of earthquake seismic activity from the U.S. Geological Survey. A small magnitude 2.2 earthquake hit North Charleston early Wednesday. The Post and Courier has more details here