Sam earman2/2/2024 Tremors from that event were felt up and down the east coast, including in the Lehigh Valley. 23, 2011, though the epicenter of that 5.8 magnitude quake was hundreds of miles away in Mineral, Va. Dozens of homes received damage to foundations and walls, and it caused a sinkhole nearly eight feet deep and 25 feet wide, according to an article in the New York Times.Īn even bigger quake shook the region on Aug. also, i am pretty proud of the degree of alignment for GPT-4 relative to previous models. 16, 1994, a magnitude 4.6 was felt near Wyomissing Hills, just west of Reading. While the majority of earthquakes in Pennsylvania are small, there have been some significant ones. Campus Reps share information about GSA, membership, meetings, and the Society and encourage the involvement of their students and professional colleagues. ![]() Something might fall off the wall, but we wouldn’t expect to see any structural damage,” Earman said.īy comparison, a magnitude 8 earthquake could last at least several minutes and cause major structural damage, Earman said. Almost 500 GSA members from two- and four-year university campuses worldwide serve as ambassadors for GSA. You can hear some rumbling, or booms can be heard. Those that are magnitude 2.0 or less usually last less than a minute. Luckily, the majority of Pennsylvania earthquakes are small, Earman said. Sometimes, if there is a lot of rain in an area with sinkholes, it could trigger movement in one of the fault lines, Earman said. It’s thought that the formation of the Appalachian Mountains could have led to some of the fault lines in the area. Earthquakes are felt once or twice per decade, with some decades having none and the 1990s having as many as six, according to the USGS.Įarman said it’s hard to pinpoint exactly why this area of southeastern Pennsylvania has a seismic zone. Since Colonial times, people in the Lancaster Seismic Zone have felt small earthquakes and suffered damage from larger ones, according to the USGS website. Thomas, Phd., Hydrology, Sam Earman, Phd., Hydrology and Rosemary Carroll, M.S, Hydrology, Desert Research. The good news for us is that most of those have been inactive and don’t really have any motion to them,” Earman said. “Pennsylvania has hundreds and hundreds of faults that have been identified. ![]() Faults are fractures in the earth’s crust where rocks on either side of the crack have slipped past each other. “ earm (I)”, in Wurdboek fan de Fryske taal (in Dutch), 2011įrom Old Frisian *arm, erm, from Proto-West Germanic *arm, from Proto-Germanic *armaz, from Proto-Indo-European *h₁erm.Earthquakes are associated with fault lines under the earth’s surface.West Frisian Etymology 1 įrom Old Frisian erm, from Proto-West Germanic *arm, from Proto-Germanic *armaz, from Proto-Indo-European *h₂ermos, *h₂ŕ̥mos.Įarm c ( plural earms or earmen, diminutive earmke) The Proto-Indo-European root is also the source of Old Church Slavonic рамо ( ramo ) ( Bulgarian ра́мо ( rámo, “ shoulder ” )), Latin armus. ![]() Old English Alternative forms įrom Proto-West Germanic *arm, from Proto-Germanic *armaz, from Proto-Indo-European * h₂er-mos ( “ joint ” ).Ĭognate with Old Frisian arm, Old Saxon arm, Dutch arm, Old High German arm ( German Arm), Old Norse armr ( Swedish arm), Gothic □□□□ ( arms ).
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