1992 Joshua Tree earthquake

None May 2025 February 2025 1992 Joshua Tree earthquake 1992-04-23 04:50:25 296868 ci3019681 1992 04 22 9:50:25 p.m. PDT USA California yes California 32.715 -117.1625 100 left San Diego Green pog.svg California 32.692222 -114.615278 100 Yuma left Green pog.svg California 34.05 -118.25 100 Los Angeles left Green pog.svg California 33.960 -116.317 Bullseye1.png 40 California 36.175 -115.136389 100 Las Vegas Green pog.svg 250 center infobox Eureka Peak Fault 4.6 L y 6.2 W yEHB 296868 November 6, 2022 7 Significant Earthquake Database https://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1 https://web.archive.org/web/20060929000601/http://www.ngdc.noaa.gov/nndc/struts/form?t=101650&s=1&d=1 dead September 29, 2006 National Geophysical Data Center / World Data Service (NGDC/WDS) National Geophysical Data Center, NOAA 10.7289/V5TD9V7K 1972 Data Set 0.36 ghttp://www.eeri.org/lfe/pdf/USA_CA_JoshuaTree_Insert_Jun92.pdf Seismic Activity Worldwide Earthquake Engineering Research Institute (EERI) November 6, 2022 9.7 km Strike-sliphttps://web.archive.org/web/20221031055909/https://scedc.caltech.edu/earthquake/jashuatree1992.html Joshua Tree Earthquake Southern California Earthquake Data Center November 6, 2022 https://scedc.caltech.edu/earthquake/jashuatree1992.html October 31, 2022 33.91 N 116.49 W region:US inline, title Inland EmpireSouthern CaliforniaUnited States Moderate >6000Hauksson Egill Jones Lucile M. Hutton Kate Eberhart-Phillips Donna The 1992 Landers Earthquake Sequence: Seismological observations Journal of Geophysical Research: Solid Earth 98 B11 1993 0148-0227 10.1029/93jb02384 19835–19858 1993JGR....9819835H 32 injuredhttps://earthquake.usgs.gov/earthquakes/eventpage/ci3019681/ M 6.1 – The 1992 Joshua Tree Earthquake, California United States Geological Survey November 6, 2022 The 1992 Joshua Tree earthquake occurred at 9:50:25 p.m. PDT (04:50:25 UTC) on April 22 in Southern California. The magnitude 6.2 earthquake struck under the Little San Bernardino Mountains, near the town of Joshua Tree, California. Though no deaths were reported, the earthquake caused 32 injuries. A maximum Mercalli intensity of VII (Very Strong) was observed in Joshua Tree and caused light to moderate damage. The event preceded the Landers and Big Bear earthquakes by two months but is now recognized as the beginning of a series of major earthquakes that culminated in two events on June 28, 1992. Earthquake The Joshua Tree mainshock struck at 9:50:25 p.m. It was caused by north-northwest-trending, right-lateral strike-slip faulting on the Eureka Peak fault which is at least 15 km long and possibly handles a significant portion of the slip transferred from the San Andreas Fault zone.https://web.archive.org/web/20221031060033/https://scedc.caltech.edu/earthquake/eurekapeak.html https://scedc.caltech.edu/earthquake/eurekapeak.html October 31, 2022 Eureka Peak Fault Southern California Earthquake Data Center November 6, 2022 Its epicenter was centered about 100 mi east of Downtown Los Angeles and about 9.7 km deep. The shaking was reportedly felt as far away as San Diego, Santa Barbara, California, Las Vegas, Yuma, Arizona, and Phoenix, Arizona. Approximately two months later, the strongest earthquake in 40 years since the 1952 Kern County earthquake hit Southern California and caused 92 million dollars in damage.https://earthquake.usgs.gov/earthquakes/eventpage/ci3031111 M 7.3 – The 1992 Landers Earthquake, California United States Geological Survey November 6, 2022 The magnitude 6.2 earthquake that occurred in Joshua Tree, California, on April 22, 1992, was a previously unmapped north-facing earthquake located about 20 km south of the Mount Pinto fault and about 10 km northeast of the mission and a maximum fault slip of 0.8 m was estimated. It was attributed to the right fault along the Late Quaternary Fault. The Creek is a tributary of the San Andreas Fault system.Bennett Richard A. Reilinger Robert E. Rodi William Li Yingping Toksöz M. Nafi Hudnut Ken Coseismic fault slip associated with the 1992 M w 6.1 Joshua Tree, California, earthquake: Implications for the Joshua Tree-Landers earthquake sequence Journal of Geophysical Research: Solid Earth 100 B4 1995 0148-0227 10.1029/94jb02944 6443–6461 1995JGR...100.6443B The proximity of the epicenter to the Coachella Valley segment, a particularly dangerous part of the San Andreas fault, immediately raised concerns that it could be a precursor to a larger earthquake. This prompted the California Department of Emergency Services to issue a warning of possible future activity in the local counties shortly after the earthquake. Impact Although this earthquake did not have surface faulting that was observed, the rupture propagated northward 12 miles (19 km) to the town of Joshua Tree, where it caused damage.https://www.conservation.ca.gov/cgs/earthquakes/landers-bigbear California Department of Conservation The 1992 Landers-Big Bear Earthquakes November 6, 2022 It caused minor damage to several bridges and minor architectural damage to public school buildings. A supermarket was damaged. 32 people were injured by the quake. Of the 170 public school facilities in the earthquake's geographic area, 10 had minor structural damage, ranging from cracks in plaster to hairline cracks in masonry walls. 48 bridges were inspected after the earthquake, and 13 showed signs of movement, nine of which were slightly damaged. None of the bridges suffered damage severe enough to affect its traffic. In some areas, it was felt for at least 60 seconds. It temporarily shut down at least one television station, but Downtown Los Angeles electrical service was not affected. The quake rattled Southern California, temporarily disrupting phone service from east of Riverside to the Arizona border. At the Hyatt Regency Suites in Palm Springs, chief security officer Jerry Iovine reported that guests on the top floor had been temporarily evacuated while construction experts examined the structure of the six-story hotel. The Governor's Office of Emergency Services issued advisories to six counties telling officials in Riverside, San Bernardino, Imperial, Los Angeles, Orange, and San Diego counties that they should be on alert for another, larger quake.https://www.latimes.com/archives/la-xpm-1992-04-23-mn-1286-story.html 6.1 Quake Felt in Wide Area of Southland November 7, 2022 Edward J. Boyer Kenneth Reich April 23, 1992 Los Angeles Times Aftershocks The earthquake had more than 6,000 aftershocks, the largest with a magnitude of 4.8. A foreshock of magnitude 4.6 occurred about two hours before the main quake. The aftershocks spread along a northward trend from about 10 km north of the San Andreas Fault northwest of Indio, California to the east-striking Mount Pinto Fault and it also preceded the Landers event near the southern end of the future Landers aftershock zones. The aftershock sequence of the Joshua Tree quake also showed a clear relative calm during the period before the Landers rupture.Ogata Yosihiko Jones Lucile M. Toda Shinji When and where the aftershock activity was depressed: Contrasting decay patterns of the proximate large earthquakes in southern California Journal of Geophysical Research: Solid Earth 108 B6 2003 2318 0148-0227 10.1029/2002jb002009 2003JGRB..108.2318O See also California List of earthquakes in 1992 List of earthquakes in California List of earthquakes in the United States 1992 Landers earthquake 1992 Big Bear earthquake References Category:Earthquakes in California Category:1992 earthquakes Category:1992 in California Category:Strike-slip earthquakes Category:1992 natural disasters in the United States Category:April 1992 in the United States