The observed pattern of oblique-slip and non-vertical dips along active segments of the northern Elsinore fault zone is consistent with their young age (~2.5 Ma), their small cumulative horizontal offset (< 15 km), and with a model in which oblique strain has yet to be partitioned between vertical strike-slip and subparallel low-angle dip-slip faults, as is observed along segments of the San Andreas fault zone in … The southeastern extension of the Elsinore fault zone, the Laguna Salada fault, ruptured in 1892 in a magnitude 7 quake, but the main trace of the Elsinore fault zone has only seen one historical event greater than magnitude 5.2 -- the earthquake of 1910, a magnitude 6 shock near Temescal Valley, which produced no known surface rupture and did little damage. The Elsinore fault zone is one of the largest in southern California, and in historical times, has been one of the quietest. 1996): the older Temecula Arkose appears to be pre-Pleistocene. The massive magnitude 7.8 earthquake reduced buildings to rubble in less than a minute, killing around 7,500 people and destroying 80% of the city. The Elsinore Fault and Highway S-2 are nearly coincident over the next 25 to 30 miles. At its southern end, the Elsinore fault is cut by the Yuha Wells fault from what amounts to its southern continuation: the Laguna Salada fault. But the 112-mille-long Elsinore Fault Zone, which runs from the Peninsular Ranges to the Chino Hills, is also estimated to be capable of producing a so-called “big one”. The Whittier fault zone extends along the southwestern base of the Puente Hills and has trapped migrating oil. Several of the fault strands which make up the Elsinore fault zone possess their own names. Los Angeles Fault Map, Southern California Earthquake Data Center, Training and Validation Data Sets for Deep Learning, Division of Geological and Planetary Sciences. A | B | C |  D | E | F |  G | H | I |  J | K | L |  M | N | O |  P | Q | R |  S | T | U |  V | W | X |  Y | Z. Compilation . The northernmost transform fault, beginning at the southeast shore of the present Salton Sea and connecting with older faults, extended all the way to Cape Mendocino and out into the ocean to join the Gorda and Juan de Fuca spreading centers (Figs. At its northern end, the Elsinore fault zones splays into two segments, the . JEFFERSON, G.T., and A.E. The Elsinore fault zone is a major dextral shear system, parallel to the southern San Andreas fault [1], that accommodates about 5 mm/yr of the Pacific-North American Plate boundary slip. Elsinore fault zone, Temecula section (Class … Several of the fault strands which make up the Elsinore fault zone possess their own names. My best backpacking trips combine both outdoor beauty and great geology. [1] [2] The onshore part of the Geologic Map of the Oceanside 30’ x 60’ Quadrangle, California was digitized at a scale of 1:24,000 while the offshore part has been enlarged from the 1:250,000-scale Continental Margin Map (Clarke and others, 1987). COX. The San Andreas fault system is the major geologic boundary between the North American and Pacific tectonic plates and passes through much of the state. Soils in lowland areas away from major faults may be … LENGTH: about 180 km (not including the Whittier, Chino, and Laguna Salada faults) PROBABLE MAGNITUDES: MW6.5 - 7.5 The information contained in this file is a DRAFT VERSION and is available for REVIEW ONLY! This movement may occur rapidly, in the form of an earthquake - or may occur slowly, in the form of creep . Average P axis from earthquake focal mechanisms for the 74 events analyzed, both on and off the fault zone, trends N01 °W ± 17° — or about 45° to 55° from the various NW-striking segments of the northern Elsinore fault zone. But despite not causing any “significant damage”, prof Ghosh said the earthquake “does remind us that the Elsinore fault exists”. The San Andreas Fault – a 750-mile fissure that runs the length of California – is thought to be the biggest risk. A fault is a fracture or zone of fractures between two blocks of rock. Fault Zone), the Elsinore Fault, the Imperial Fault, the Laguna Salada Fault (in the Elsinore Fault Zone), the San Andreas Fault, the Superstition Hills Fault, and the Wienert Fault (in the San Jacinto Fault Zone). There are three formations within the Elsinore Fault Zone that are fossiliferous (Pajak et al. The active Elsinore Fault Zone diagonally crosses the southwest corner of the quadrangle, and is a major element of the right-lateral strike-slip San Andreas Fault system. Seismologists regularly issue apocalyptic warnings about the two fault lines most likely to produce a massive quake – the San Andreas and Hayward faults. As of January 12, 2017, the USGS maintains a limited number of metadata fields that characterize the Quaternary faults and folds of the United States. 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In the figure to the right, you can see the largest of the quakes as well as the general pattern of them, which together revealed a 50-meter-wide fault zone. The Elsinore Fault Zone separates the Santa Ana Mountains block west of the fault zone from the Perris block to the east. TYPE OF FAULTING: right-lateral strike-slip These earthquakes could be related to low-angle blind faults similar to the Peralta Hills fault located farther north.” The Elsinore fault zone forms a complex of pull-apart basins. She said a magnitude 7 or greater earthquake could kill “tens of thousands of people”. When you subscribe we will use the information you provide to send you these newsletters. The Elsinore fault zone is one of the largest in southern California, and in historical times, has been one of the quietest. Based on available information, the Elsinore fault zone is considered to contain those active faults nearest the City of San Diego. TEJADA-FLORES. Just after 2 a.m. on Thursday, Jan. 25, a 4.0-magnitude earthquake struck and was centered west of the 15 Freeway between Lake Elsinore and Corona. “I think it is dangerous that we do not pay too much attention to the Elsinore Fault,” said Ghosh. The Daily Star's FREE newsletter is spectacular! The northern elements of the fault zone, the Chino and Whittier faults, bound the Puente Hills, an uplifted block of Tertiary sediments. the Elsinore Fault Zone. Arctodus simus (Cope, 1879) from Riverside County, California. 1). Faults may range in length from … Cybersecurity researcher, Oded Vanunu, has warned of the dangers of online vendors, UFO wreckage could ‘change lives forever' after Pentagon admits finding debris, Documents reveal the Pentagon has recovered UFO debris and conducted tests on futuristic materials. He said it is important for the US state to “be prepared” for inevitable earthquakes in the future. Granite out-crops, indicated in pink, occur over most of the area between the two fault zones. Because the Elsinore fault has a slow slip-rate, major rupture events are much more likely to happen than on the San Andreas and Hayward faults. You can unsubscribe at any time. At its southern end, the Elsinore fault is cut by the Yuha Wells fault from what amounts to its southern continuation: the Laguna Salada fault. The Eastern Tennessee Seismic Zone (ETSZ), also known as the East Tennessee Seismic Zone and the Southern Appalachian Seismic Zone, is a geographic band stretching from northeastern Alabama to southwestern Virginia that is subject to frequent small earthquakes.The ETSZ is one of the most active earthquake zones in the eastern United States.

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