The central Virginia seismic zone (CVSZ), New Madrid, MO, seismic zone, and the central Oklahoma intraplate seismic zone are all bisected by major river systems. [65] Other regional faults such as the Washita Valley fault which runs parallel to the Meers fault may also be capable of causing earthquakes. PLEASE NOTE: We are aware of an issue that keeps iOS10 Chrome users from reporting their location. [14] The fault may generate strong earthquakes in the future;[66] earthquakes with magnitudes Mw 7.5–8 might be possible on the Meers fault[67] and an earthquake similar to the Holocene ones would be felt over large parts of the continent, including Oklahoma and Texas,[54] with intensities comparable to these of the 1886 Charleston earthquake and 1811–12 New Madrid earthquakes. [9] It dips first northeastward[12] but deeper it becomes either vertical or down-to-the-southwest,[13] but certainly steep at depth. While the fault was active during the Permian-Cambrian, movement possibly accompanied by earthquakes took place during the Holocene and formed the fault scarp, with one earthquake occurring less than 2,000 years ago. [42][12] The slip rate has been estimated to be 0.02 millimeters per year (0.00079 in/year), which is typical for intraplate faults. ", "My Favorite Outcrop(s): An Imposter Exposed? Earthquakes with a magnitude of 2.5 or higher, All content submitted must be your original work. [56] Likewise, seismicity is scarce in the wider region[31] and photographic analysis has shown little evidence of recent fault movement in other faults of the Wichita fault system. [17] The scarp was described as a Permian fault scarp before Holocene activity was discovered[70] and made known by Gilbert 1983 and Donovan et al. Liu , M. , S. Stein , and H. Wang ( 2011 ). [5] The fault scarp is located on private land;[6] the southeastern part runs through farmland and the northwestern part runs through hilly terrain. [17] It is possible that the fault rupture was limited by geological structures that occur at the northwestern end of the Meers fault[45] where it splays out. [18] The Meers fault is the only Mid-Continent fault scarp[21] and has been called the "finest" such scarp east of the Rocky Mountains. A hydrograph Other areas, such as the Wabash Valley and East Tennessee Seismic zones also produce earthquakes on a regular basis. Relocated Hypocenters and Structural Analysis from Waveform Modeling of Aftershocks from the 2011 Prague, Oklahoma, Earthquake Sequence by Marius P. Isken* and Walter D. Mooney Abstract We present an analysis of aftershocks with M L >3 from the 2011 Prague, Oklahoma, earthquake sequence, an intraplate sequence of moderate-size earthquakes Continuing high rates of small magnitude earthquakes, the great historical earthquakes of 1811-1812 and large paleoseismic earthquakes define the NMSZ as one of the major intraplate seismic zones of the world [Johnston & Schweig, 1996]. [39] More fault movements occurred in the Permian and the Pleistocene[13] although there are no post-Permian rock formations in the area that could allow an estimation of post-Paleozoic movements. Information regarding earthquakes in Arkansas including types of faults magnitude and intensity scales, seismology, seismic waves, epicenters (New Madrid Seismic Zone and the Enola Swarms) and more. You warrant that you are the sole owner of all rights in any content you submit, and that anyone appearing in your photos or videos has granted you permission to provide them to NewsOK.com. [31], The Meers fault is among the most prominent tectonic structures in the region. Lithospheric strength and intraplate seismicity in the New Madrid seismic zone. The New Madrid Fault Zone, sometimes called the New Madrid Fault Line, is a major seismic zone and a prolific source of intraplate earthquakes (earthquakes within a tectonic plate) in the southern and midwestern United States, stretching to the southwest from New Madrid, Missouri. The New Madrid fault system was responsible for the 1811–12 New Madrid earthquakes, an intense intraplate earthquake series that began with an initial earthquake of moment magnitude 7.5–7.9 on December 16, 1811, and was followed by a moment magnitude 7.4 aftershock on the same day.They remain the most powerful earthquakes to hit the contiguous United States east of the Rocky … 2020-12-07 07:32:32 UTC 2.1 magnitude, 4 km depth Alva, Oklahoma, United States 2.1 magnitude earthquake 2020-12-07 07:32:32 UTC at 07:32 December 07, 2020 UTC 0 people just felt an earthquake. The observed seismicity shows both spatial clustering in seismic zones and scattering across large plate interiors, temporal clustering followed by long periods of quiescence, and migration of seismicity from one seismic zone to another. The existence of intraplate earthquakes remains a deep scientific mystery with strong societal implications that needs to be solved by innovative approaches. [34] The fault system, which also includes the Meers fault[35] as its southern margin,[36] was active during the Mississippian to Permian, generating a total offset of about 12 kilometers (7.5 mi). [62] Assessing the hazard potential for the Meers fault suffers from similar problems[44] but it is considered the largest seismic hazard source of the central United States[63] as it has the potential to cause large earthquakes[31] and earthquakes in the central United States usually affect much larger regions than those of the western United States. An insurance company policy’s boilerplate exclusionary language is the latest victim of salt-water induced earthquakes in Oklahoma. Meers Fault is a fault in Oklahoma that extends from Kiowa County to Comanche County. The tectonic [35] Additional faulting appears to have occurred over 12,000 years ago, but evidence thereof was partly eroded away during a time of a wetter climate[41] and prior to the Holocene the fault might have been inactive for 100,000–130,000 years. [33], All these faults lie in the area of the Frontal Wichita fault system, which is located between the Anadarko Basin to the north and the Amarillo-Wichita uplift to the south[3] and separates the two. Towns close to the fault are Cooperton, Meers, Apache, Fort Sill,[3] Treasure Island and Elgin;[4] Oklahoma State Highway 19, Oklahoma State Highway 115, Oklahoma State Highway 58 and U.S. Route 281 cross the fault[3] and Oklahoma State Highway 44 might do so as well. [35] The possibility that faulting continued for another 30 kilometers (19 mi) along its northwestern end is equivocal[13] with some evidence indicating that recent faulting was limited to Comanche County;[46] research published in 2019 indicates that the northwestern segment did not move during the 1,200 BP earthquake but was active in the 3,400–2,900 BP event. Did you? We present a new hypothesis that major intraplate seismic zones are restricted to places where concentrated crustal deformation (CCD) is overprinted on large‐scale basement structures. A quake with an... KATHMANDU, Nepal (AP) — China and Nepal jointly announced a new official height for Mount Everest on Tuesday, ending a discrepancy between the two nations. [19] Because the scarp is not present along the entire length of the fault, it is subdivided in a southeastern section in Comanche County and a northwestern section in Kiowa County, with only the southeastern section featuring a scarp. 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