A so-called earthquake “swarm” that is hitting South Carolina appears to be getting stronger, researchers said this week.
Two earthquakes with a magnitude of 3.5 and 3.6, respectively, hit Wednesday close to Elgin, South Carolina, according to the U.S. Geological Survey. Days before that, a 3.4 magnitude earthquake struck in another part of the state, while a 3.9 magnitude earthquake struck near the Georgia-South Carolina state line on June 18.
