1998 Pymatuning earthquake

Earthquake in Pennsylvania, United States May 2025 April 2024 1998 Pymatuning earthquake USA Pennsylvania y 1998-09-25 19:52:52 usp0008vh3 1998 09 25 03:52 p.m. EDT blg 5.2 yes 5 km mi on 41.495 -80.388 Southern Great Lakes seismic zone Oblique-slip reverseUSGS focal mechanism https://earthquake.usgs.gov/earthquakes/eventpage/usp0008vh3/moment-tensor?source=us&code=pde19980925195252070_5_C_HRV 2020-08-11 United States Geological Survey Pennsylvania, Ohio VIIUSGS ShakeMap data https://earthquake.usgs.gov/earthquakes/eventpage/usp0008vh3/shakemap/intensity 2020-08-11 United States Geological Survey 1206808 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 blg yes,Maceira 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 10.1785/gssrl.71.6.742 2000SeiRL..71..742M USGS differential magnitude list https://earthquake.usgs.gov/earthquakes/eventpage/usp0008vh3/origin/magnitude 2020-08-11 United States Geological Survey it was the largest recorded earthquake in Pennsylvania's history. Earthquake The earthquake's epicenter was in the Southern Great Lakes seismic zone, about 25 km mi us southwest of Meadville; its depth was 5 km mi 1 us. The earthquake caused minor damage in towns near its epicenter and was felt in the states of Ohio, Pennsylvania, Indiana, Michigan, New York, Illinois and New Jersey, as well as Southern Ontario in Canada.https://neic.usgs.gov/neis/eq_depot/1998/eq_980925/ Magnitude 5.2 Pennsylvania United States Geological Survey November 10, 2003 March 20, 2009 https://web.archive.org/web/20090311001956/http://neic.usgs.gov/neis/eq_depot/1998/eq_980925/ 11 March 2009 live Hydrologic occurrences After the earthquake many wells in the epicentral region began to dry up, while new springs and old wells began to flow. A three-month date range revealed 120 dry household-supply wells on the ridge of Jamestown and Greenville. Pymatuning earthquake in Pennsylvania and Late Minoan Crisis on Crete Gorokhovich Y 2007 Water Science and Technology: Water Supply 10.2166/ws.2007.028 Fleeger G 1 7 245–251 Declines of up to 100 feet (30 m) were observed on a ridge where at least 80 of these wells resided. The degree of the damage varied. Some of the wells lost all power or could barely hold their yields and some of the water in wells turned black or began to smell of sulfur. The most likely cause of the wells drying was because of the increase in hydraulic conductivity or "hydraulic islands" of shale rock under this area caused by the earthquake. The quake affected the existing faults and created new faults in the shale. This created more permeability for the water to leak down from the hilltops on the ridge down to the valleys following the contours of the Meadville shale down to the 14–18 square km area of the valley. See also Pennsylvania Earth sciences List of earthquakes in 1998 List of earthquakes in the United States References 41.49 -80.38 dim:200000_region:US-PA title Pymatuning Pymatuning Pymatuning earthquake Category:Earthquakes in the United States Category:Natural disasters in Pennsylvania Pymatuning earthquake