"Magnitude 5.8 – VIRGINIA". USGS Earthquake Hazards Program. U.S. Department of the Interior. March 20, 2012. Archived from the original on March 29, 2012. Retrieved April 6, 2012.
"M5.8 – Virginia". USGS Earthquake Hazards Program. U.S. Department of the Interior. November 30, 2011. Archived from the original on April 28, 2012. Retrieved April 6, 2012.
"Magnitude 5.8 – VIRGINIA". USGS Earthquake Hazards Program. U.S. Department of the Interior. March 20, 2012. Archived from the original on March 29, 2012. Retrieved April 6, 2012.
"M5.8 – Virginia". USGS Earthquake Hazards Program. U.S. Department of the Interior. November 30, 2011. Archived from the original on April 28, 2012. Retrieved April 6, 2012.