South Texas experienced an earthquake Monday morning.

Magnitude 3.9
Date-Time Monday, April 07, 2008 at 09:51
Location 28.930°N, 98.028°W A rare South Texas earthquake with a preliminary magnitude of 3.7 occurred at 4:52 a.m. on April 7th. about 10 miles west of Karnes City, according to the National Weather Service.

There was one report of shaking desks on the third floor of a building near downtown San Antonio.

Depth 5 km (3.1 miles) set by location program
Region SOUTHERN TEXAS
Distances 6 km (4 miles) S (189°) from Falls City, TX
13 km (8 miles) WNW (291°) from Karnes City, TX
17 km (10 miles) SSE (162°) from Poth, TX
45 km (28 miles) E (95°) from Pleasanton, TX
75 km (46 miles) SE (141°) from San Antonio, TX
446 km (277 miles) SSW (196°) from Dallas, TX

Location Uncertainty horizontal +/- 6.9 km (4.3 miles); depth fixed by location program
Parameters NST= 41, Nph= 41, Dmin=153.9 km, Rmss=0.86 sec, Gp=119°,
M-type=moment magnitude (Mw), Version=Q
Source USGS NEIC (WDCS-D)