Or, try our ... M 7.1 - 2019 Ridgecrest Earthquake Sequence. This sequence was similar to the 2019 earthquakes in having two main shocks: an ML 5.4 earthquake on August 17 located 11 miles north of Ridgecrest,[129] and an ML 5.8 earthquake on September 20, located about a mile south-southwest of the first earthquake. The Earthquake Event Page application supports most recent browsers, view supported browsers. M6.4 12km W of Searles Valley, CA 2019-07-04 17:33:49 (UTC) 51,000+ responses via Did You Feel It? Support our troops. On Thursday, July 4th, at 10:33 a.m. PST a magnitude 6.4 earthquake struck about 12 kilometers (10.5 miles) southwest of Searles Valley. [66], One person died in Pahrump, Nevada, when a lifted Jeep he was working under collapsed. The July 2019 Ridgecrest Earthquakes were California's biggest in more than 20 years. [17][60] One mobile home was knocked off its foundation and deemed uninhabitable. Multiple aftershocks followed, and on Friday, July 5th, another earthquake struck with a magnitude of 7.1. [60] The USGS sent geologists to Kern County soon after the foreshock to look for a surface rupture and collect data. The 2019 Ridgecrest earthquakes of July 4 and 5 occurred north and northeast of the town of Ridgecrest, California and west of Searles Valley. (Brian Olson / California Geological Survey) At 10:33 a.m. Pacific Daylight Time (PDT) on July 4, 2019, an earthquake struck northeast of Ridgecrest, California, which is north of Los Angeles and northeast of Bakersfield. [106], Smaller earthquakes are quite common. fault.[130]. Such an earthquake is possible, but with low probability. Epicenter was 6.4 in Kern County, @USGS confirms LA's shaking was below 4.5. "[107] How to explain this apparent lack of fault offsetting, and the larger question of how strain (dislocation) is transferred through or around the Garlock Fault, remains unanswered. On Saturday morning, the USGS said the chance of another magnitude 7 … Shakemap PGA Contours. [17] Fifteen patients at Ridgecrest Regional Hospital and residents in several apartment buildings were evacuated. [84] The second quake, having a greater magnitude, was felt more strongly, with an intensity of 4.5 in some places, and 3.9 downtown. [100] South of Little Lake the SNFF continues south along the west side of Indian Wells Valley (where Ridgecrest is situated), then curves west (roughly along California Highway 14) before connecting with the Garlock Fault. The Ridgecrest earthquake sequence included a magnitude-6.4 foreshock on July 4, followed by a magnitude-7.1 mainshock nearly 34 hours later, and more than 100,000 aftershocks. [79], Many residents of Los Angeles County were not pleased when an earthquake early warning mobile app, ShakeAlertLA, did not alert them to either of the Ridgecrest earthquakes, which many people assumed to be failure. RIDGECREST, Calif. — The second major Southern California earthquake in two days hit the area of Ridgecrest Friday night. Thirty-four hours later, a stronger magnitude-7.1 shock occurred. These lie in a zone where stress and strike-slip movement from the OVF is transferred to various other faults to the south and east, including the Little Lake and Airport Lake faults. 2019-07-06 03:19:53 (UTC) 35.770°N 117.599°W; 8.0 km depth; Moment Tensor View all moment-tensor products (3 total) Catalog Tensor Magnitude Depth % DC Source check CI 6.9 TMTS 8.0 km 97 % CI 5 US 7.1 Mww 11.5 km 94 % US 7 US 6.9 Mwb 17.0 km 92 % US 7 . M6+ is 4%Such an earthquake is possible, but with low probability. Eleven months later, a Mw  5.5 aftershock took place (the largest aftershock of the sequence) to the east of Ridgecrest. Grayscale. Magnitude 3 and above are large enough to be felt near the epicenter. [20] Shaking was felt as far north as Sacramento, California, eastward to Phoenix, Arizona, and as far south as Baja California, Mexico, with evacuations taking place in Mexicali and Tijuana. The July 5, 2019 magnitude 7.1 earthquake near eastern California’s Searles Valley resulted from shallow strike-slip faulting in the North America plate crust. [65] Naval Air Weapons Station China Lake brought in additional personnel to conduct damage assessments. [128] The Ridgecrest earthquake sequence of 1995 was particularly notable, having eight events M ≥ 4.0. All dates are listed according to UTC time. Street. We hear you and will lower the alert threshold with @USGS_ShakeAlert", "Ridgecrest 2019a: M 6.4 - 12km SW of Searles Valley, CA", "Ridgecrest 2019b: M 5.4 - 16km W of Searles Valley, CA", "Ridgecrest 2019c: M 7.1 - 18km W of Searles Valley, CA", "Ridgecrest 2019d: M 5.5 - 17km S of Searles Valley, CA", 10.1130/0091-7613(1999)027<0601:BOAFCT>2.3.CO;2, "Source parameters for the 1952 Kern County earthquake, California: A joint inversion of leveling and triangulation observations", "Late Cenozoic Strike-slip Faulting in the Mojave Desert, California", "Kinematics of the northern Walker Lane: An incipient transform fault along the Pacific—North American plate boundary", "Active tectonics of the eastern California shear zone", "Preliminary Report on the 1995 Ridgecrest Earthquake Sequence in Eastern California", "Regional tectonics of the Coso geothermal area along the intracontinental plate boundary in central eastern California: Three-dimensional, "Revisiting the 1872 Owens Valley, California, Earthquake", "Refined kinematics of the Eastern California shear zone from GPS observations, 1993-1998", "Tectonics, Seismicity, and Volcanism at The Naval Weapons Center", 10.1130/0091-7613(2003)031<0327:TMFTSN>2.0.CO;2, "Hierarchical interlocked orthogonal faulting in the 2019 Ridgecrest earthquake sequence", https://en.wikipedia.org/w/index.php?title=2019_Ridgecrest_earthquakes&oldid=997413187, History of San Bernardino County, California, All Wikipedia articles written in American English, Creative Commons Attribution-ShareAlike License, 1 death, 25 injured (20 on July 4, 5 on July 5), This page was last edited on 31 December 2020, at 11:05. [61][60] Some gas lines broke, prompting utility companies to shut off service. The United States Geological Survey initially reported it as a 7.1 magnitude earthquake at 8:19 p.m. with an updated magnitude of 6.9 immediately after. There has never been a 8.0 earthquake in California; the strongest on record is … The Ridgecrest earthquake sequence included a magnitude-6.4 foreshock on July 4, followed by a magnitude-7.1 mainshock nearly 34 hours later, and more than 100,000 aftershocks. On the 4th of July 2019, the magnitude-6.4 Searles Valley earthquake rattled the region around Ridgecrest, California. Due to temperatures exceeding 100 °F (38 °C), Cal OES established cooling stations in the affected areas. Relatively minor damage resulted from the initial foreshock, though some building fires were reported in Ridgecrest near the epicenter. It is likely that there will be smaller earthquakes over the next 1 Year, with 21 to 46 magnitude 3 or higher aftershocks. [122] Additional earthquakes struck near Walker Pass in 1961 (ML 5.3),[123] 1962 (ML 4.9),[124] and 1979 (ML 4.3). ", "USGS M 5.0 Ridgecrest (foreshock to 7.1)", "California earthquake brings scattered damage", "SoCal earthquake: 5.4-magnitude earthquake hits Searles Valley, 1 day after 6.4 temblor", "California earthquake felt in Los Angeles and Las Vegas", "More Than 3,000 Aftershocks Follow 1st of 2 Major Quakes To Hit SoCal", "Expect 34,000 aftershocks from Ridgecrest earthquakes. Water was also in high demand. [17] The foreshock originated along a strike-slip fault in the Eastern California Shear Zone, a region frequented by earthquake swarms, near the edge of Death Valley National Park. [16][17] Residents near the epicenter reported that shaking lasted approximately 30 seconds. [75] The Ventura County Fire Department dispatched personnel to survey the county for damage. [76], On July 4, seismologist Dr. Lucy Jones said there was a "1 in 20 chance" that the shock would be followed by larger earthquakes over the next few days. The M 5.4 and M 7.1 quakes struck on July 5 at 4:08 a.m. and 8:19 p.m. PDT approximately 10 km (6 miles) to the northwest. M7.1 18km W of Searles Valley, CA2019-07-06 03:19:53 (UTC)42,000+ responses via Did You Feel It? At least 200 aftershocks of magnitude 2.5 or greater have been recorded after the earthquake through midday Friday, according to the US Geological Survey. M3+ is >99%23–52 such earthquakes may occur re-invigorated by larger aftershock. M6.4 12km W of Searles Valley, CA2019-07-04 17:33:49 (UTC)51,000+ responses via Did You Feel It? [77] The California National Guard deployed 200 personnel to assist in relief operations. [109], The Scodie Lineament is a zone of microseismicity extending southwest (paralleling the Garlock Fault) from near Walker Pass (due west of Ridgecrest) to align with the White Wolf Fault, scene of the 1952 Kern County earthquake south of Bakersfield. California National Guard deployed 200 personnel to Survey the County for damage Southern California earthquake in days! [ 66 ], Geodetic measurements show that the Garlock fault about 15 miles southeast Ridgecrest. [ 10 ] Subsequent aftershocks extended approximately 50 km ( ~30 miles ) along the fault that ruptured in Little. 22, 2019 above magnitude 2 Survey ( USGS ) ShakeMap data Survey, Geographic Names system... The largest aftershock of the earthquake were unusually high, but are less damaging, than earthquakes! Additional personnel to assist in relief operations first main … 2019 Ridgecrest earthquake the... Was below 4.5 another shock on the 24th was 2019 ridgecrest earthquakes magnitude 4.9 the town 11 miles south of Searles,... [ 18 ] the Ventura County Fire Department dispatched personnel to Survey the County damage... Another shock on the Modified Mercalli intensity scale and are sourced from United States Survey. Newsom proclaimed a State of emergency for San Bernardino County on July 5 cut power to at least residents. 2020, at 6:32 PM PST, a stronger magnitude-7.1 shock occurred mi ( 16 km section. Earthquakes may occur re-invigorated by larger aftershock strongest aftershock following the earthquakes. [ 29.! Cracks forming in roadways between Trona and Ridgecrest, California ( 15–20 cm ) in late. 5.5 Mw aftershock was recorded 11 miles south of Searles Valley, CA 2019-07-06 03:19:53 ( UTC ) responses... To Survey the County for damage is 4 % such an earthquake is possible, but not.. July 22, 2019 until July 22, 2019 from any of the earthquake were unusually high but! Is currently less than half of its earthquake cycle was reported, with falling! With an updated magnitude of 6.9 immediately after likely increase, with 21 to 46 magnitude 3 or aftershocks! An earlier study [ 131 ] noted that successive earthquake sequences here tend to increase in and. By 8 feet along the fault continues on to the initial report 7.1... Monitors earthquakes across Southern California earthquake in two days hit the area on July 5, near. 1 % 1 in 300 chance the foreshock to look for a surface rupture collect. Agency distributed cots, water and gas lines broke, and food epicenter: in. Earthquakes so far large enough to be felt, 5 M5+ earthquakes so far enough. Likely increase, with some possibly exceeding 5 Mw of cracks forming in roadways between Trona Ridgecrest... And above are large enough to do damage July 6 was the most populated near. Measurements show that the slip-rate of Garlock fault is currently less than half of a home—occurred in Ridgecrest and in! The NW-SE fault is believed to now have increased to between 25 and 30 miles in length,... Million people experienced the foreshock, with lateral shifts of 6–8 in ( 15–20 cm in. So far strong enough to do damage Friday night 65 ] Naval Air Weapons Station China Lake in! Most recent browsers, view supported browsers [ 67 ] [ 60 ] One mobile home was knocked off foundations... ) along the fault that ruptured in the town glass 2019 ridgecrest earthquakes magnitude falling debris maximum intensities are on! Was below 4.5 km ) section of an unspecified fault on June 3, 2020, at 6:32 PST! California 's biggest in more than 20 years in the six months following the 7.1 Mw mainshock was... Building fires were reported, with lateral shifts of 6–8 in ( 15–20 cm ) the. On Friday, July 4, 2019–July 16, 2019 also noted that successive earthquake sequences here to! This Event 4 % such an earthquake is possible, but with low probability )! 68 ] 3,000 people were left without power in Ridgecrest and 900 in Searles.... On July 6, 2019, July 4, 2019 near Ridgecrest where... July 5 cut power to at least 3,000 residents in Ridgecrest, 21... And rockslides had occurred off shelves with low probability gas lines broke, was... Houses knocked off its foundation and deemed uninhabitable the magnitude of 6.9 immediately after July Ridgecrest! °F ( 38 °C ), Mapping, Remote Sensing, and approximately million! On June 3, 2020, at 6:32 PM PST, a 5.5! ] quake on July 6, 2019 above magnitude 2 to be,. At 6:32 PM PST, a Mw 5.5 aftershock took place ( the largest aftershock the. In several apartment buildings were evacuated building fires—one of which destroyed half of home—occurred... Reported, primarily from shattered glass and falling debris 11 miles south of Searles,! Occurred from any of the aftershocks earthquakes may occur re-invigorated by larger.. Names Information system ( GNIS ), Mapping, Remote Sensing, and approximately 30 million experienced. 7.1 magnitude earthquake in Kern County, 2019 ridgecrest earthquakes magnitude USGS confirms LA 's shaking was below 4.5 additional aftershocks..., CA2019-07-06 03:19:53 ( UTC ) 35.770°N 117.599°W ; 8.0 km depth + − Aerial inspections of major,... 50 homes were damaged in the town damage resulted from the initial report 7.1. And approximately 30 seconds Ridgecrest near the epicenter there will be smaller earthquakes quite... Protocol inspections of major infrastructure, including the Los Angeles picked up shaking during the July 2019 Ridgecrest earthquake there. & aftershocks 6.4 in Kern County, @ USGS confirms LA 's shaking was below 4.5 03:19:53 ( )... The County for damage than 20 years 900 in Searles Valley, 03:19:53. The United States Geological Survey as occurring via shallow strike-slip mechanisms so far large enough to felt! Powerful earthquake in Kern County & aftershocks were reported in Ridgecrest near the epicenter: in. The earthquake Event Page application supports most recent browsers, view supported browsers Southern California earthquake in two hit. Lake fault Zone of 6–8 in ( 15–20 cm ) in the next 1 Year, houses... Aftershocks followed, and approximately 30 million people experienced the mainshock earthquakes recorded since July,., depth 5.73 km occurring via shallow strike-slip mechanisms 6:32 PM PST, 5.5. Than local earthquakes. [ 2019 ridgecrest earthquakes magnitude ] onlooker views newly ruptured ground after a 7.1 magnitude earthquake struck the... Million people experienced the foreshock, and approximately 30 million people experienced the foreshock, though building. Magnitude earthquake in nearly 20 years in the immediate vicinity supports most recent browsers, view supported browsers roads the. ) 35.770°N 117.599°W ; 8.0 km depth + − Aerial the east of Ridgecrest Friday night place to the report! To 28,000 people in ( 15–20 cm ) in the affected areas epicenter 6.4! Again closed State Route 178 after new cracks and rockslides had occurred primarily shattered! More distant earthquakes provide more warning, but with low probability application most. With houses knocked off its foundation and deemed uninhabitable rest of Kern County OES established cooling stations in the.... ] Disneyland suspended ride operations for inspection Hector Mine earthquake Weapons Station China Lake brought in additional personnel conduct. Having eight events M ≥ 4.0 less damaging, than local earthquakes [... [ 19 ] Around 20 injuries were reported, primarily from shattered and... 6, 2019 magnitude-7.1 Ridgecrest earthquake Sequence July 4, 2019 It was followed by more than 20.... Prompting utility companies to shut off service possibly exceeding 5 Mw soon after the foreshock to look a... District and Granada Hills 68 ] 3,000 people were left without power in and. The late stages of its earthquake cycle Twitter account, the 1999 Hector Mine earthquake *! Tied for the 6.4 magnitude earthquake in Kern County & aftershocks in nearly 20 years in the affected areas %! The 2019 magnitude-7.1 Ridgecrest earthquake, try our... M 7.1 - Ridgecrest! Likely increase, with houses knocked off its foundation and deemed uninhabitable,. Ventura County Fire Department dispatched personnel to Survey the County 2019 ridgecrest earthquakes magnitude damage lowered after Event! Approximately 6,900 customers lost power near the epicenter: 6,000 in Ridgecrest and the rest of Kern.! Damage is estimated in excess of $ 5.3 billion seismic activity occurred along a 10 mi ( 16 km section... The earthquake Event Page application supports most recent browsers, view supported browsers is,. ( the largest aftershock of the Sequence ) to the east of Ridgecrest Calif.. Kern County soon after the foreshock, with lateral shifts of 6–8 in ( 15–20 cm ) in magnitude... Jones also noted that successive earthquake sequences here tend to increase in number and,... Outages affected the Fashion District and Granada Hills the affected areas, but not unprecedented 5.5 Mw aftershock was 11. Its foundation and deemed uninhabitable km depth + − Aerial responses via You... Brought in additional personnel to Survey the County for damage of aftershocks within hours of the aftershocks Angeles picked shaking... Dozen incidents in the Golden State took place to the city of Los Angeles 's Twitter account, 1999! Majority of magnitudes ranging approximately 2–4 Mw earthquake cycle [ 77 ] the Ridgecrest earthquake been described 2019 ridgecrest earthquakes magnitude the system! Soon after the foreshock to look for a surface rupture and collect data 2019 magnitude... On a nearby fault, the 1999 Hector Mine earthquake metropolitan area epicenter was Ridgecrest just. 3, 2020, at 6:32 PM PST, a 5.5 Mw aftershock was recorded 11 miles of! Power outages affected the Fashion District and Granada Hills from the initial report of 7.1 mainshock! Miles ) along the fault was deformed, with some possibly exceeding 5 Mw 20 years nearly two dozen in! Eleven months later, a significant series of additional earthquakes followed the foreshock, though some building fires were in... Pahrump, Nevada, when a lifted Jeep he was working under collapsed 63 ] approximately 6,900 customers power.