SMU professor Brian Stump points to seismograms on a screen from Irving station, deployed yesterday during a press conference at SMU on Jan. 6, 2015.
SMU professor Brian Stump points to seismograms on a screen from Irving station, deployed yesterday during a press conference at SMU on Jan. 6, 2015. FortWorth
SMU professor Brian Stump points to seismograms on a screen from Irving station, deployed yesterday during a press conference at SMU on Jan. 6, 2015. FortWorth

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