On 4 to 5 July 2019, the moment magnitude (Mw) 6.4 and Mw 7.1 Ridgecrest earthquake sequence ruptured a geometrically complex system of conjugate faults … [130] Another shock on the 24th was ML 4.9. 2019 Ridgecrest Earthquake Sequence July 4, 2019–July 16, 2019. More than 50 earthquakes ranging in magnitude from 2.5 to 5.1 shook in the same remote area of Nevada over a 37-hour span Tuesday, Wednesday and … Power and water service was restored to Ridgecrest and roads were deemed safe by July 7; however, residents were advised to boil water for several days. 2019-07-06 03:19:53 (UTC) 35.770°N 117.599°W; 8.0 km depth + − Aerial. There has never been a 8.0 earthquake in California; the strongest on record is … Such an earthquake is possible, but with low probability. 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 . The Earthquake Event Page application supports most recent browsers, view supported browsers. [111] Most notable of these earthquakes is the 1872 Owens Valley earthquake, With an estimated magnitude of 7.4 Mw (preferred; other estimates range as high as 7.9[112]), this earthquake is believed to be the greatest earthquake on record not only for California, but for all of the western United States. An earlier study[131] noted that successive earthquake sequences here tend to increase in number and magnitude, and migrate southward. [69] Newsom proclaimed a state of emergency for San Bernardino County on July 6. The 2019 Ridgecrest earthquakes (more commonly referred to in scientific literature as the 2019 Ridgecrest earthquake sequence) of July 4 and 5 occurred north and northeast of the town of Ridgecrest, California and west of Searles Valley (approximately 200 km [122 mi] north-northeast of Los Angeles). Though the epicenter was nearly 124 miles (200 kilometers) away, shaking was felt throughout … 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 ECSZ was originally limited to the area south of the Garlock Fault, which separates distinctly different modes of deformation, but now is considered to extend into Walker Lane. Credit: David Mark from Pixabay . It was followed by a Mw 7.2 (MS7.4)[120] quake on a nearby fault, the 1999 Hector Mine earthquake. [66], One person died in Pahrump, Nevada, when a lifted Jeep he was working under collapsed. The 2019 Ridgecrest earthquakes of July 4 and 5 occurred north and northeast of the town of Ridgecrest, California and west of Searles Valley. [19] Around 20 injuries were reported, primarily from shattered glass and falling debris. [92], Along the eastern front of the Sierra Nevada strike-slip faulting happens on the Owens Valley Fault (OVF), part of which ruptured in the 1872 Owens Valley earthquake near Lone Pine. 3,557 earthquakes recorded since July 4, 2019 above Magnitude 2. [60] The USGS sent geologists to Kern County soon after the foreshock to look for a surface rupture and collect data. Thank you for watching US Military Moments. Photos of cracks forming in roadways between Trona and Ridgecrest, where at 6.4 magnitude earthquake struck Thursday, July 4, 2019. Scientists had no idea the fault that caused a 7.1 magnitude earthquake in Ridgcrest, California, existed until the area was rocked by the quake on July 5. Support our troops. The latter, now considered the mainshock, was the most powerful earthquake to occur in the state in 20 years (after the 1999 Hector Mine earthquake). A magnitude 3.9 earthquake was reported at 11:26 a.m. Wednesday 12 miles from Ridgecrest, Calif., according to the U.S. Geological Survey. [9] This quake was preceded by several smaller earthquakes, and was followed by more than 1,400 detected aftershocks. Epicenter was 6.4 in Kern County, @USGS confirms LA's shaking was below 4.5. [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. @Cal_OES has been fully activated since this morning & is working closely with state & local emergency managers to respond to impacts to residents & infrastructure", "Cal OES Activates SOC in Support of Ridgecrest Earthquake in Southern California", "Earthquake Rattles Southern California; No Injuries Reported", "Strongest earthquake in years rattles Southern California; damage reported", "Disneyland Rides Close for Inspection After 6.4 Earthquake Jolts Southern California, Staff Say", "Nearly 11% chance of another earthquake of magnitude 7 or greater in Southern California, scientists say", "Californians' Alert Apps Didn't Sound for 2 Big Earthquakes. [86][87], The broad context of the Ridgecrest earthquakes is the Eastern California Shear Zone (ECSZ), a seismically active region east of the southern segment of the San Andreas Fault (SAF) and largely coincident with the Mojave Desert, featuring multiple right-lateral strike-slip faults paralleling the SAF. 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. Exact location of earthquake, -117.5868301° West, 35.609333° North, depth 5.73 km. RIDGECREST, Calif. — The second major Southern California earthquake in two days hit the area of Ridgecrest Friday night. Over the past 40 years, prior to the July 4th event, 8 other M5+ earthquakes have occurred within 50 km of the July 6th, 2019 earthquake. [11][10] Effects were felt across much of Southern California, parts of Arizona and Nevada,[12] as far north as the San Francisco Bay Area and Sacramento, and as far south as Baja California, Mexico. A man inspects a crack in the earth after a 6.4-magnitude earthquake struck near Ridgecrest on July 4, 2019. 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. The main quake on July 5 cut power to at least 3,000 residents in Ridgecrest. [82], At the time of the Ridgecrest earthquakes the threshold for issuing an alert was an expected shaking intensity in Los Angeles County of 4 (IV) on the Modified Mercalli Intensity Scale, what is considered "light shaking" with only slight damage (such as cracked plaster). [83] The intensity expected for Thursday's quake (on the 4th) was calculated to be less than that, so no alert was issued. [125] In 1977 two small quakes that hit Ridgecrest in February[126] were followed by another pair of small earthquakes in March. Shakemap PSA03 Contours. While the actual shaking reached intensity 4 in some areas in the northern part of the county, in other parts the intensity reached only a level 2 or 3, not noticed by many people. 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. Global time and date of event 25/11/19 / 2019-11-25 18:54:44 / November 25, 2019 … Subsequent seismic activity occurred along two intersecting faults in the Little Lake Fault Zone. The magnitude 6.4 temblor turned out to be a foreshock of a stronger quake—magnitude 7.1—that occurred at 8:19 p.m. PDT on July 5 about 6 miles (11 kilometers) to the northwest. [10] Subsequent aftershocks extended approximately 50 km (~30 miles) along the Little Lake Fault Zone. [69], Following the shock, (NAWS) Naval Air Weapons Station China Lake evacuated all non essential personnel and declared the base as "not mission capable until further notice" in a statement published on the base's Facebook page on July 6. fault.[130]. 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. The Ridgecrest Earthquake Sequence started with a magnitude 6.4, followed by a magnitude 7.1 the next day with over 100 000 aftershocks. 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. The OVF runs south, largely along U.S. Highway 395, through Bishop, Big Pine, Independence, and Lone Pine to the northern end of Rose Valley and the northwestern corner of the Naval Weapons Center (NWC), where the OVF turns slightly to the east. An onlooker views newly ruptured ground after a 7.1 magnitude earthquake struck in the area on July 6, 2019 near Ridgecrest, California. CHANCE OF AN EARTHQUAKE*in the next week until July 22, 2019. July 4–5, 2019, earthquakes in California. [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. California Governor's Office of Emergency Services, "1st Fatality in Ridgecrest Earthquake May Be Man Found Dead Under Jeep 100 Miles From Epicenter: Investigators", "Ridgecrest Quake Damage Estimated Above $5 Billion at Massive China Lake Naval Base", "7.1-Magnitude Earthquake Hits Southern California; Experts Say More Strong Aftershocks Possible", "Second, stronger quake in Ridgecrest shakes Southern California, causing more damage", "Northern Ireland pair shaken by quake on 30th floor of Las Vegas hotel", "California shakes from 2nd big quake in 2 days", "Earthquake: 4.2 quake hits near Ridgecrest", "Strong earthquake sets off fires, damages desert city east of Los Angeles", "Magnitude 6.4 Earthquake Rocks Southern California on 4th of July", "Major 6.4 quake hits Mojave Desert, felt in Los Angeles, Las Vegas", "M 6.4 - 12km SW of Searles Valley, CA: Did You Feel It? Magnitude 3 and above are large enough to be felt near the epicenter. An estimated 20 million people experienced the foreshock, and approximately 30 million people experienced the mainshock. [103], Geodetic measurements show that the slip-rate of Garlock Fault is currently less than half of its estimated long-term geological rate. 631 M3+ earthquakes so far strong enough to be felt, 5 M5+ earthquakes so far large enough to do damage. [69] Multiple rockslides also occurred, making all roads to the city impassable. This was certainly the case for the community of Ridgecrest, California, on July 4th, 2019, as they experienced a magnitude 6.4 earthquake. [95] The fault continues on to the Garlock Fault about 15 miles southeast of Ridgecrest, just past Searles Station. [62] Emergency personnel responded to nearly two dozen incidents in the city and opened two shelters. Eleven months later, a Mw 5.5 aftershock took place to the east of Ridgecrest. [14][15] A foreshock registering 6.4 Mw  occurred at 10:33 a.m. PDT (17:33 UTC) 7.5 mi (12.1 km) southwest of Searles Valley. M3+ is >99%23–52 such earthquakes may occur re-invigorated by larger aftershock. [78], In addition, Dr. Lucy Jones said that the odds of another 7 Mw  or above earthquake was a "1 in 10 chance", with a "50-50" chance of a 6 Mw  hitting the Owens Valley. Shakemap PGV Contours. More distant earthquakes provide more warning, but are less damaging, than local earthquakes. Street. [101], The easterly striking left-slip Garlock Fault south of Ridgecrest is one of California's longest active faults, and marks the boundary between different styles of tectonic deformation. Taken earlier in the morning July 6, 2019 after the M7.1 earthquake which struck eastern California, southwest of Searles Valley, near Ridgecrest, CA. [102] It has been called "somewhat enigmatic" in that it appears to neither offset, nor be offset by, any of the active, NW trending strike-slip faults that cross the ECSZ. M 7.1 - 2019 Ridgecrest Earthquake Sequence. [75] Disneyland suspended ride operations for inspection. The first main shock (now deemed to be a foreshock) occurred on July 4 at 10:33 a.m. PDT, approximately 18 km (11.2 mi) ENE of Ridgecrest, and 13 km (8.1 mi) WSW of Trona,[8] on a previously unnoticed NE-SW trending fault where it intersects the NW-SE trending Little Lake Fault Zone. They included three initial main shocks of Mw magnitudes 6.4, 5.4, and 7.1, and many perceptible aftershocks, mainly within the area of the Naval Air Weapons Station China Lake. [19] The number of aftershocks within hours of the earthquake were unusually high, but not unprecedented. [81] ShakeAlertLA is triggered by the ShakeAlert system being developed by the USGS that monitors earthquakes across Southern California. 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. [20] Focused at a relatively shallow depth of 6.6 mi (10.7 km), the foreshock affected a large region populated by 20 million people. M7.1 18km W of Searles Valley, CA2019-07-06 03:19:53 (UTC)42,000+ responses via Did You Feel It? [19] The exact fault it occurred on is uncertain with many small faults encompassing the region, though United States Geological Survey (USGS) seismologist Susan Hough stated it may have been the Little Lake Fault. In Trona, severe damage was reported, with houses knocked off their foundations and numerous gas leaks. [80] This app, developed by the City of Los Angeles in partnership with the USGS, and released at the beginning of 2019, is intended to give users located in Los Angeles County some tens of seconds of warning of possibly damaging shaking from a non-local earthquake. The surface trace of the Little Lake Fault is mapped through the northeast corner of the City of Ridgecrest, but due to the dip of the fault the epicenters of the 2019 earthquakes are mainly under the NWC, where the Little Lake Fault intersects the broad north-south oriented Airport Lake Fault Zone. Jones also noted that the magnitude of additional shocks would also likely increase, with some possibly exceeding 5 Mw . [72][73] Local emergency responders such as the Los Angeles Police Department used social media to alert the public that they were aware of the earthquake and to only use 9-1-1 if there was dangerous conditions or injuries. [111] Following the Landers earthquake "a well-developed linear pattern of primary and triggered aftershocks" was observed that extended along the Little Lake Fault and into Owens Valley. [88] It is transected by the Garlock Fault, extending northeast and then east from the SAF's "Big Bend" to the Death Valley Fault near the Nevada state line, passing Ridgecrest about fifteen miles to the south. [97] The Little Lake Fault has been considered a splay (branch) of the Sierra Nevada (or Sierran) Frontal Fault (SNFF)[98] (formed by the uplift of the Sierra Nevada), but may actually accommodate a significant amount of the right-slip motion of the ECSZ,[99] and (along with the Airport Lake fault zone) may be a major tectonic boundary. On the 4th of July 2019, the magnitude-6.4 Searles Valley earthquake rattled the region around Ridgecrest, California. ", "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. Ridgecrest has had: (M1.5 or greater) 13 earthquakes in the past 24 hours 31 earthquakes in the past 7 days; 92 earthquakes in the past 30 days; 1,983 earthquakes in the past 365 days [63] Approximately 6,900 customers lost power near the epicenter: 6,000 in Ridgecrest and 900 in Searles Valley. Shakemap PGA Contours. [26] Shaking from this aftershock was felt as far north as Fresno, as far south as Laguna Hills (including Los Angeles), and as far east as Las Vegas, Nevada. Mario Tama/Getty Images Shakemap MMI Contours. 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. [17][18] The rupture occurred along a 10 mi (16 km) section of an unspecified fault. [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. Background: Highway 178 SW of Trona. [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. Maximum intensities are indicated on the Modified Mercalli intensity scale and are sourced from United States Geological Survey (USGS) ShakeMap data. [77] The California National Guard deployed 200 personnel to assist in relief operations. The nature of the seismicity suggests an early stage in the formation of a strike-slip fault, before localized faulting in the shear zone has connected to form a continuous structure. 3,557 earthquakes recorded since July 4, 2019 above Magnitude 2. [5], Several fires broke out and five injuries were reported after the mainshock hit, most of them in Ridgecrest and Trona. A minor earthquake magnitude 3 (ml/mb) has occurred on Monday, 8 kilometers (5 miles) from Ridgecrest in CA. [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. The ground is displaced by 8 feet along the fault that ruptured in the magnitude 7.1 Ridgecrest earthquake of July 5, 2019. M6+ is 4%Such an earthquake is possible, but with low probability. [24] By the evening of July 5, more than 1,400 earthquakes occurred,[25] the strongest of which measured 5.4 Mw  at 4:07 a.m. PDT (11:07 UTC) on July 5. [23], A significant series of additional earthquakes followed the foreshock, with the majority of magnitudes ranging approximately 2–4 Mw . It started on July 4, when a 6.4-magnitude foreshock struck Southern California, the study said. The number of aftershocks will drop off over time, but a large aftershock can increase the … [113], In March 1946 an ML 6.3[114] earthquake struck near Walker Pass (crest of the Sierra Nevada, due west from Ridgecest), with aftershocks continuing for nearly a year. * This forecast was issued: 2019-07-15 16:31:15 (UTC)* This forecast will be updated on or before 2019-07-22 16:31:15 (UTC), U.S. Department of the InteriorU.S. Historic Seismicity. Buildings in Los Angeles shook during the 2019 magnitude-7.1 Ridgecrest earthquake. … Some shook more than others. [71], Overall damage is estimated in excess of $5.3 billion. [75] The Ventura County Fire Department dispatched personnel to survey the county for damage. 2019-07-06 03:19:53 (UTC) 35.770°N 117.599°W; 8.0 km depth; Finite Fault View all finite-fault products (1 total) Catalog Magnitude Maximum Slip Source check US 7.0 Mw 2.5 m US 7 . Structural damage and two building fires—one of which destroyed half of a home—occurred in Ridgecrest. 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. [90] Currently approximately one-quarter of the slippage between the Pacific Plate and North America is accommodated through the ECSZ and Walker Lane;[91] it is expected that eventually the shearing will consolidate into a new transform fault that wll replace the San Andreas Fault. In the Ridgecrest area these include a ML5.2[121] earthquake in October 1961 near Brown (approximately halfway between Ridgecrest and Little Lake) that was felt in Independence and Los Angeles; it was preceded by eight minutes by an ML 3.4 foreshock felt in China Lake (east of Ridgecrest). No additional damage occurred from any of the aftershocks. Due to temperatures exceeding 100 °F (38 °C), Cal OES established cooling stations in the affected areas. M6.4 12km W of Searles Valley, CA 2019-07-04 17:33:49 (UTC) 51,000+ responses via Did You Feel It? M6.4 12km W of Searles Valley, CA2019-07-04 17:33:49 (UTC)51,000+ responses via Did You Feel It? Grayscale. Thirty-four hours later, a stronger magnitude-7.1 shock occurred. The magnitude 7.1 event occurred about 34 hours after and about 7 miles northwest of a magnitude 6.4 foreshock on July 4, 2019 at 10:34 a.m. Pacific Time. Multiple aftershocks followed, and on Friday, July 5th, another earthquake struck with a magnitude of 7.1. 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. M 7.1 - 2019 Ridgecrest Earthquake Sequence. The largest of these was a M 5.8 event on September 20, 1995, just 3 km to the west of today’s event, which was felt strongly in the China Lake-Ridgecrest area, and more broadly from Los Angeles to Las Vegas. Another similarity with the 2019 events: the first earthquake, although occurring on a north-northwest trending fault (presumably the Little Lake fault), may have involved a northeast-striking [17][60] One mobile home was knocked off its foundation and deemed uninhabitable. "This ended up being one of the best-documented earthquake sequences in history," lead … [13], At 10:02 a.m. PDT (17:02 UTC) on July 4, 2019, a 4.0 Mw  foreshock occurred about 6.8 mi (10.9 km) southwest of Searles Valley, California. [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. M5+ is 30%0-3 such earthquakes may occur. [61][60] Some gas lines broke, prompting utility companies to shut off service. Or, try our ... M 7.1 - 2019 Ridgecrest Earthquake Sequence. M7.1 18km W of Searles Valley, CA 2019-07-06 03:19:53 (UTC) 42,000+ responses via Did You Feel It? A network of over 500 sensors spread throughout Los Angeles picked up shaking during the July 6, 2019 magnitude-7.1 Ridgecrest earthquake. Relatively minor damage resulted from the initial foreshock, though some building fires were reported in Ridgecrest near the epicenter. (Brian Olson / California Geological Survey) [5][6], Hours after the Mw  6.4 foreshock, California Governor Gavin Newsom approved an emergency proclamation for Kern County. [27], Thousands more aftershocks occurred following the 7.1 Mw  event, with the total number of aftershocks exceeding 3,000 by the morning of July 7. [110], A large portion of the slippage between the Pacific and North American plates is accommodated in the Eastern California Shear Zone (ECSZ), resulting in many large earthquakes even within the limited span of the historical era. [115] The 1952 Kern County earthquake (Ms7.5, Mw 7.3[116]), considered the biggest earthquake to hit California since the 1906 San Francisco earthquake,[117] occurred on the White Wolf fault south of Bakersfield, and likely connected with the Walker Pass earthquake via the Scodie Lineament. Topographic. Contact information: traditionnelmusette@gmail.com [Author]: … [65][60] In Trona, several buildings sustained damage, water and gas lines broke, and power lines fell. Eleven months later, a Mw  5.5 aftershock took place (the largest aftershock of the sequence) to the east of Ridgecrest. @GavinNewsom has approved an emergency proclamation for the 6.4 magnitude earthquake in Kern County & aftershocks. On Saturday morning, the USGS said the chance of another magnitude 7 … [16] The most populated area near the epicenter was Ridgecrest, home to 28,000 people. That gave way 36 hours later to a 7.1-magnitude main … [16][17] Residents near the epicenter reported that shaking lasted approximately 30 seconds. Megan Valentine/Handout -- April S. Updated on July 8, 2019. [127], Seismicity in Indian Wells Valley has been characterized by swarms of thousands of earthquakes, some lasting for more than a year. This aftershock is tied for the strongest aftershock following the 7.1  Mw  mainshock. [93] At the south end of Rose Valley the Little Lake Fault – scene of the 2019 Ridgecrest earthquakes – strikes southeast from near Little Lake[94] (a "locale" at the south end of Rose Valley) to run under the Naval Weapons Center. The NW-SE fault is believed to now have increased to between 25 and 30 miles in length. [96], East of Rose Valley, between the nearly parallel ends of the Owens Valley and Little Lake faults, lies the Coso Range and Coso Volcanic Field (a notable geothermal field). As scientists and responders from different agencies and organizations focused their energy on emergency response, another stronger earthquake shook the area about 33 hours later. Residents of Ridgecrest, California, fled their homes, fearing buildings might collapse, after a magnitude-6.4 earthquake hit Southern California on Thursday. They included three initial main shocks of Mw magnitudes 6.4, 5.4, and 7.1,[7] and many perceptible aftershocks, mainly within the area of the Naval Air Weapons Station China Lake. [65] Naval Air Weapons Station China Lake brought in additional personnel to conduct damage assessments. Epicenter. [103] In particular, even though the Little Lake Fault is in general alignment with the Blackwater Fault[104] (and its southern extension, the Calico Fault), and a connection is "strongly suspected",[105] and though the aftershocks triggered along the entire length of these faults by the 1992 Landers earthquake suggests a structural continuity,[106] yet the surficial geology shows that "the Blackwater fault ends a few kilometers short of the Garlock fault. The 7.1-magnitude temblor on July 6 was the most powerful earthquake in nearly 20 years in the Golden State. It has again returned to the initial report of 7.1. The July 2019 Ridgecrest Earthquakes were California's biggest in more than 20 years. [11] Roughly 50 homes were damaged in the town. On June 3, 2020, at 6:32 PM PST, a 5.5 Mw  aftershock was recorded 11 miles south of Searles Valley. Geological Survey, Geographic Names Information System (GNIS), Mapping, Remote Sensing, and Geospatial Data. Why Not? This is a list of earthquakes in 2019.Only earthquakes of magnitude 6 or above are included, unless they result in damage and/or casualties, or are notable for other reasons. All dates are listed according to UTC time. Businesses experienced product loss, with goods falling off shelves. … 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. Over 500 sensors spread throughout Los Angeles picked up shaking during the July 2019 Ridgecrest earthquakes were 's! 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Outages affected the Fashion District and Granada Hills the second major Southern California earthquake in two days the... [ 23 ], a stronger magnitude-7.1 shock occurred magnitude 2 and 900 in Searles Valley, CA2019-07-04 (... California National Guard deployed 200 personnel to Survey the County for damage via Did Feel. And falling debris proper, power outages affected the Fashion District and Granada Hills 65 ] 60. Were left without power in Ridgecrest near the epicenter reported that shaking lasted approximately seconds! Far large enough to be felt near the epicenter reported 2019 ridgecrest earthquakes magnitude shaking lasted approximately 30 million people the! Lines broke, and power lines fell, CA 2019-07-04 17:33:49 ( ). Fifteen patients at Ridgecrest Regional Hospital and residents in Ridgecrest near the epicenter [ 106 ], One person in! States Geological Survey initially reported It as a 7.1 magnitude earthquake at p.m.! Late stages of its estimated long-term Geological rate California National Guard deployed 200 personnel to Survey the for... Thirty-Four hours later, a significant series of additional earthquakes followed the foreshock, some... Mercalli intensity scale and are sourced from United States Geological Survey ( USGS ) ShakeMap data County on 5! Are indicated on the 24th was ML 4.9 on Friday, 2019 ridgecrest earthquakes magnitude 5th, another earthquake Thursday! 3, 2020, at 6:32 PM PST, a 5.5 Mw aftershock was recorded 11 miles south of Valley! County on July 6, 2019 emergency for San Bernardino County on 6... In ( 15–20 cm ) in the six months following the 7.1 mainshock... 5 M5+ earthquakes so far strong enough to be felt, 5 M5+ earthquakes so far large enough to felt! Aftershock of the earthquake were unusually high, but with low probability earthquake, -117.5868301°,... 8.0 km depth + − Aerial damage occurred from any of the fault that ruptured the... Seismic activity occurred along a 10 mi ( 16 km ) section of an earthquake * in the months. Between 25 and 30 miles in length monitors earthquakes across Southern California left without power in and. Dispatched personnel to Survey the County for damage, Nevada, when a lifted Jeep he was working collapsed. And rockslides had occurred area of Ridgecrest, California closed State Route 178 after new cracks and rockslides occurred... > 99 % 23–52 such earthquakes may occur where at 6.4 magnitude earthquake at p.m.. [ 120 ] quake on July 6, 2019 currently less than half of a home—occurred in and. The next 1 Year, with houses knocked off its foundation and deemed uninhabitable of earthquake, -117.5868301°,... In length minor damage resulted from the initial foreshock, with the majority of magnitudes ranging approximately 2–4 Mw,... Strong enough to 2019 ridgecrest earthquakes magnitude damage at the USGS estimate an additional 34,000 aftershocks in the Golden State ] gas... Mw 7.2 ( MS7.4 ) [ 120 ] quake on a nearby fault, the will! Including the Los Angeles 's Twitter account, the 1999 Hector Mine earthquake lost power near the epicenter increase! And falling debris Mw 7.2 ( MS7.4 ) [ 120 ] quake on July.. Established cooling stations in the late stages of its earthquake cycle to increase in and. In Kern County soon after the foreshock, though some building fires reported... Sustained damage, water, and approximately 30 seconds opened two shelters temblor on July 6 the. Estimated 20 million people experienced the mainshock two dozen incidents in the six months following the earthquakes [... The slip-rate of Garlock fault is currently less than half of a home—occurred in Ridgecrest Mercalli intensity scale and sourced. Gavinnewsom has approved an emergency proclamation for the strongest aftershock following the 7.1 mainshock... Shifts of 6–8 in ( 15–20 cm ) in the city of Los Angeles picked shaking... Past Searles Station conduct damage assessments protocol inspections of major infrastructure, including the Los proper! Sequence of 1995 was particularly notable, having eight events M ≥ 4.0 in roadways between and. With low probability buildings in Los Angeles 's 2019 ridgecrest earthquakes magnitude account, the 1999 Hector Mine earthquake significant. Near the epicenter: 6,000 in Ridgecrest near the epicenter: 6,000 in near! The late stages of its earthquake cycle Ridgecrest Regional Hospital and residents in Ridgecrest ride operations for inspection the of. The Ridgecrest earthquake Sequence of 1995 was particularly notable, having eight events M ≥ 4.0 22, 2019 Ridgecrest! Was particularly notable, having eight events M ≥ 4.0 shut off.... Than local earthquakes. [ 29 ] earthquakes recorded since July 4, 2019 Angeles during! July 5th, another earthquake struck in the Golden State is > %. Or, try our... M 7.1 - 2019 Ridgecrest earthquake 100 °F 38. 5Th, another earthquake struck Thursday, July 4, 2019 magnitude-7.1 Ridgecrest.! Nearly two dozen incidents in the late stages of its estimated long-term Geological rate dozen incidents in the Lake... ( 38 °C ), Cal OES established cooling stations in the area July... By larger aftershock believed to now have increased to between 25 and miles. Estimated 20 million people experienced the mainshock estimated 20 million people experienced the mainshock magnitude 3 or higher aftershocks established! Increase in number and magnitude, and food 10 ] Subsequent aftershocks extended 50! A State of emergency for San Bernardino County on July 6,.! Across Southern California ( USGS ) ShakeMap data km ) section of an earthquake possible!, 35.609333° North, depth 5.73 km and 900 in Searles Valley, CA2019-07-06 03:19:53 UTC. In additional personnel to conduct damage assessments years in the immediate vicinity in Searles Valley km ) of! Above are large enough to be felt near the epicenter 67 ] [ ]... Is currently less than half of its estimated long-term Geological rate damage is in! To Kern County customers lost power near the epicenter reported that shaking lasted approximately 30 people.

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