Dreher Shoals Dam aka Lake Murray Dam - Image from Lake Murray Country website.
UPDATE: The SC Emergency Management Division reported as of 6:20 a.m. Saturday, that a 2.4 magnitude earthquake did occur in the Midlands Friday night. On whether the two events were related, EMD said via Twitter, "Both incidents occurred at the same time. We'll let the crews working on the gas line make that determination and let you know if one led to the other."Â
ORIGINAL STORY:
A relief valve caused a loud noise and rumbling heard for miles around Friday night around 9:45 at a power station near the Lake Murray Dam.