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Magnitude 4.5 - VIRGINIA

2003 December 9 20:59:14 UTC

Preliminary Earthquake Report

Small Globe

Magnitude 4.5
Date-Time Tuesday, December 9, 2003 at 20:59:14 (UTC)
= Coordinated Universal Time
Tuesday, December 9, 2003 at 3:59:14 PM
= local time at epicenter

Time of Earthquake in other Time Zones
Location 37.599°N, 77.932°W
Depth 5 km (3 miles) set by location program
Distances 26 km (16 miles) SE (130°) from Columbia, VA
28 km (17 miles) WSW (256°) from Short Pump, VA
30 km (19 miles) WSW (249°) from Wyndham, VA
42 km (26 miles) W (279°) from Richmond, VA
167 km (104 miles) SSW (209°) from Washington, DC
Location Uncertainty horizontal +/- 8.7 km (5.4 miles); depth fixed by location program
Parameters Nst= 15, Nph= 15, Dmin=63.4 km, Rmss=0.93 sec, Gp=169°,
M-type="Nuttli" surface wave magnitude (MLg), Version=Q
Event ID uscdbf
Felt Reports This was a complex event consisting of two sub-events occurring 12 seconds apart. Slight damage (VI)at Bremo Bluff and Kents Store. Felt (V) at Columbia, Fork Union, Goochland, Oilville, Rockville andSandy Hook; (IV) at Appomattox, Amelia Court House, Amherst, Blackstone, Bumpass, Charlottesville,Chester, Chesterfield, Colonial Heights, Cumberland, Dillwyn, Farmville, Glen Allen, Lawrenceville,Louisa, Manakin Sabot, Mechanicsville, Midlothian, Mineral, Palmyra, Petersburg, Powhatan, Richmond,Scottsville and Spotsylvania; (III) at Alexandria, Fairfax, Falls Church, Fredericksburg, Lexington,Lynchburg, McLean, Roanoke, Staunton and Vienna. Also felt (III) at Bethesda, Rockville and SilverSpring, Maryland and at Rocky Mount and Winston Salem, North Carolina. Felt (II) at Chapel Hill,Greensboro and Raleigh, North Carolina and at Washington, DC. Felt in much of Maryland and Virginia.Also felt in north-central North Carolina and a few areas of Delaware, New Jersey, New York,Pennsylvania and West Virginia.

Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver