Earth ChangesAncient fault in South Carolina awakens with rare earthquake Posted on March 16, 2026 by Administrator A 3.0-magnitude earthquake has rattled areas of South Carolina on Thursday. The tremor was detected outside of Lexington and Columbia, home to over 160,000 people combined. The epicenter, Irmo, lies near the Brevard Fault Zone and other ancient faults that run through the southeastern US, remnants of tectonic activity from hundreds of millions of years ago.