The U.S. Geological Survey reported a 3.6 magnitude earthquake centered in Montgomery County at 5:04 a.m. Friday.
The epicenter was in Gaithersburg near the intersection of I-270 and Route 124 (39.145°N, 77.222°W), USGS reported in a preliminary finding. Its depth was 3.1 miles.
I slept right through it.
