A 6:37 AM DC Emergency Alert Update had this summary.

Due to the Minor Earthquake - 20 Miles NW from Washington, DC. WASA,PEPCO, DDOT, WMATA reported No Injuries, No Building or Property damages. All Roadway/ Lanes are Clear. All Metro-rails and Metro Buses are running according to scheduled time.

A 5:57 AM alert had these details.

USGS reports: 

• Magnitude: 3.7 (Preliminary magnitude)  

• Location: 39.145*N, 77.222 W  

• Depth 20 km (12.4miles) set by location program  

• 20 Miles NW from Washington, DC