Magnitude 3.6 earthquake – Irving, Texas – January 7, 2015


TX_010715These are seismograms of the magnitude 3.6 earthquake that occurred in Irving, Texas on Jan 7, 2015.  The bottom seismograph 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 these seismograms, and other seismology research in Texas, see the University of Texas Institute for Geophysics —

Also see —

“Fracking Examined as Possible Factor in Texas Quakes, Experts Say” —


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