The 1998 Pymatuning earthquake occurred in the U.S. state of Pennsylvania on September 25 at 19:52 UTC. With a magnitude of 5.2 mbLg,[1][4] it was the largest recorded earthquake in Pennsylvania's history.
^ abMaceira, M.; Ammon, C.J.; Herrman, R.B. (2000). "Faulting Parameters of the September 25, 1998 Pymatuning, Pennsylvania Earthquake". Seismological Research Letters. 71 (6): 742–752. Bibcode:2000SeiRL..71..742M. doi:10.1785/gssrl.71.6.742.
^"USGS focal mechanism". earthquake.usgs.gov. Retrieved August 11, 2020.
^""USGS ShakeMap data". earthquake.usgs.gov. Retrieved August 11, 2020.
^"USGS differential magnitude list". earthquake.usgs.gov. Retrieved August 11, 2020.
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