In 1931, the west Texas town of Valentine experienced Texas’ “big one.” It had a magnitude of 6.4 on the Richter Scale and was strongly recorded on seismographs across the globe. Evidently, it made quite a mess of the small town, too.
It was recorded at Nacogdoches, TX — about 145 miles from the epicenter. The P-wave arrived at about 00:52:45, and the S-wave arrived at about 00:…53:10.
For more information about this seismogram, and other seismology research in Texas, see the University of Texas Institute for Geophysics —