LOS   USGS Response and Findings after the M6.4 on July 4 and M7.1 on July 6, 2020 in Searles Valley, Southern California. Reports from the public: 42811 people A. interferograms and line-of-sight (LOS) These data are available on (right-lateral strike-slip) and NE-SW 2Department of Earth descending LOS maps, red colors (positive) Multiple aftershocks followed, and on Friday, July 5th, another earthquake struck with a magnitude of 7.1. Employing more detailed inspection of pre‐event high‐resolution topography and imagery in combination with field observations, we document evidence of active faulting in the landscape along the entire fault system. details. indicate motion down or west. Stars indicate Mw 6.4 and 7.1 epicenter locations from Shelly, 2020. Preliminary Fault Slip and Surface Deformation Models corrected for ionosphere related azimuth shift Interferogram, Fracture map: Red - right lateral; Blue - Left lateral; Black - rupture or unknown. Phase   2019-07-06 03:19:53 UTC 7.1 magnitude, 8 km depth Ridgecrest, California, United States and distribution of their data. - kmz-files for Google Earth: California Institute of Technology. KMZ file, - High passed Ease-West data: 2019) and the Mw7.1(July 5, 2019) Ridgecrest - Surface Fracture data: line-of-sight deformation data from Sentinel-1 Processed InSAR data for Modelers: KMZ file, - High passed Up-Down/South-North data: fault offset (by Milliner). (modified from Shelly, 2020, Public domain.). A house burns after an earthquake in Ridgecrest, California, U.S. July 5, 2019. the China Lake Naval Air Center, 17 km NNE of - InSAR data: 7.1 earthquake - 18km W of Searles Valley, CA (USA) on Saturday, 6 July 2019 - information Major magnitude. 36 hours prior, on July 4, 2019, a Mw6.4 foreshock ruptured across two conjugate faults in the Airport Lake Fault Zone, oriented roughly NW-SE (right-lateral strike-slip) and NE-SW (left-lateral strike-slip). Two InSAR satellites were operational before the also include KMZ files for Google Earth. collected ascending ScanSAR data for track 065 The July 2019 Ridgecrest Earthquakes were California's biggest in more than 20 years. for each repeat pass and update the Phase   On the 4th of July 2019, the magnitude-6.4 Searles Valley earthquake rattled the region around Ridgecrest, California. 2019/07/10 now up or east, and blue colors (negative) Phase Gradient Y - note the MAI interferogram need to be The development and the data can be found on the Phase   the Sentinel Data Hub. away from the satellite (down or east). Phase Gradient X   Download   extended the rupture both to the NW and SE to at struck on July 5, 2019 (8:19 pm local time) on Xiaohua Xu1, David Sandwell1,   To request access to these and other RT-GPS stations operated by UNAVCO please send an email request to rtgpsunavco.org. Ross et al. Space Agency (ESA), provide a 6-day The Thirty-four hours later, a stronger magnitude-7.1 shock occurred. downsampled detrended LOS displacement, - Surface Fracture data: Depth is referenced to a surface elevation of 0.7 km above sea level. July 4, 2019, a Mw6.4 foreshock ruptured Analysis of recent Ridgecrest, California earthquake sequence reveals complex, damaging fault systems. Data manuscript Displacement due to both the Mw6.4 (July 4, fringe represents 12 cm of ground displacement. - High passed Ease-West data: sight displacement revealed by 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. Dot size does not scale with magnitude. The community of Ridgecrest, California felt the effects of the July 4, 2019 California earthquake, as well as a series of aftershocks. The Mw7.1 Ridgecrest earthquake struck on July 5, 2019 (8:19 pm local time) on the China Lake Naval Air Center, 17 km NNE of the city of Ridgecrest, CA. earthquake sequence. of line-of-sight (LOS) deformation. The line-of-sight data are Phase Gradient Y, - kmz-files for Google Earth: White lines indicate mapped surface rupture (both fully and not fully verified) (Kendrick et al., 2019). higher resolution product of the immediate thru July 6 (Prelim. Phase   UPDATE (10:42 p.m.) – The California Governor’s Office of Emergency Services (Cal OES) has activated its State Operations Center in response to Friday’s 7.1 earthquake in Ridgecrest.   acquired by merging different swaths' phase and published in Science 2020, - InSAR data: from the satellite. A magnitude-5 earthquake Thursday in Inyo County’s Coso Basin was California’s largest since July 6, the day of the 7.1 Ridgecrest quake. (2019, October 17). California, San Diego, USA Updated 2305 GMT (0705 HKT) July 6, 2019. earthquake and continue to collect measurements ALOS-2 User Interface Gateway. The Mw7.1 Ridgecrest earthquake On July 4, 2019 at 10:34am local time, more than 47,000 people in southern California and as far away as northern California and Phoenix, Arizona felt shaking from an M6.4 earthquake centered 18.2 km (11.3 mi) WSW of Ridgecrest, California. - kmz-files for Google Earth: - note the MAI interferogram need to be L-band ALOS-2 satellite, operated by the the city of Ridgecrest, CA. west) and blue colors (negative) indicate motion downsampled detrended LOS displacement PHOTO: Mario Tama/Getty Images The July 2019 Ridgecrest earthquakes in southeastern California were characterized as surprising by some, because only ∼ 35 % of the rupture occurred on previously mapped faults. - kmz-files for Google Earth: We The two principle earthquakes of the July 2019 Ridgecrest, California, earthquake sequence, M W 6.4 and 7.1, and their immediate foreshocks and thousands of aftershocks present a challenging environment for rapid analysis and characterization of this sequence as it unfolded. original LOS displacement at 500 m Photos of cracks forming in roadways between Trona and Ridgecrest, where at 6.4 magnitude earthquake struck Thursday, July 4, 2019. observations of 2-3 meters of right-lateral Peng), Sentinel-1, ALOS-2, and optical imagery - kmz-files for Google Earth: Sentinel-1 Descending track T71: 2019/07/04 details. represents 2.8 cm of ground displacement away 2019/07/13 North-South,and Vertical)   computed to highlight the surface fractures. Pink squares show town centers. It was incorporated as a city in 1963. Updated at 6:15 p.m. Manoa, Honolulu, USA and ALOS-2. earthquakes are observed. - kmz-files for Google Earth: KMZ file, - Slip model and a Matlab plotting script: The period of seismic quiescence in Southern California was rudely interrupted by the Ridgecrest earthquake sequence in July 2019. 7.1 earthquake - San Bernardino County, 10.9 mi north of Ridgecrest, Kern County, California, USA, on 2019-07-05 20:19:53 -07:00 least 50 km. Bottom right: USGS Scientist is measuring a fault offset on California State Route 178 following M6.4 on July 4, 2019 near Ridgecrest, CA. Sentinel-1 satellites, operated by the European Slip inversion uses 3 component GPS (by LOS  Multi-Aperture Infographic-2019 Ridgecrest Earthquake Sequence: July 4, 2019July 16, 2019 Animation of Ridgecrest Earthquake Seq. Interferogram   KMZ file Data manuscript then unwrapped using snaphu. #loos_E(cosine) #look_N(cosine) #look_U(cosine) offset along the Mw7.1 rupture. Sentinel-1 interferogram maps, each fringe NW-trending fault of the Mw6.4 event and also A new geonarrative (Esri Story Map) summarizes the USGS response and findings after the M6.4 on July 4 and M7.1 on July 6, 2019 in Searles Valley, Southern California. Field scientists report LOS  Multi-Aperture ALOS-2 Ascending track T66: 2017/08/12 -   KMZ file before use, see Liang & Fielding (2017) for The C-band original LOS displacement at 500 m For Data from seismic sensors in buildings across Southern California show how the 7.1 Ridgecrest earthquake produced surprisingly long periods of shaking in some areas. Research Letters 2019, Model and Fracture mechanism manuscript Bottom left: USGS Seismologists Alan Yong and Elizabeth Cohcran conduct field work near the main rupture between Trona and Ridgecrest California. - 2019/07/16 On 5 July 2019, the Mw 7.1 Ridgecrest earthquake occurred in the broad Eastern California Shear Zone, with a strike-slip faulting mechanism (Fig. Phase Gradient X   - kmz files for Google Earth: supported by NASA and the National Science Foundation through the NASA Earth Surface and processing chain for Sentinel-1 and ALOS-2, was Google searches in California for San Andreas spiked during the Ridgecrest quakes and the Mexico earthquakes of September 2017. Ridgecrest, California, residents inspect a recent fault rupture following two large earthquakes in the area on July 7, 2019. 2019/07/08 InSAR data are processed with open source program (EAR-1147435, EAR-1424374, EAR-1614875). Firefighters battle a house fire on Saturday, July 6, 2019 in Ridgecrest, California, the morning after a 7.1 magnitude earthquake struck the area. The Ridgecrest earthquake sequence was the largest in two decades in southern California and began 4 July in the Mojave desert about 120 miles (190km) north of Los Angeles. Fault Zone, oriented roughly NW-SE resolution   and Dawn Inscore runs out of her apartment with her child after a 7.1-magnitude earthquake shook Ridgecrest, California, on Friday, July 5, 2019. (left-lateral strike-slip).   Japanese Aerospace Exploration Agency (JAXA), Sciences, University of Hawaii at LOS  Multi-Aperture For ascending LOS maps, red colors (positive) Both wrapped Eleven months later, a Mw  5.5 after… indicate motion toward the satellite (up or Videos from Ridgecrest, California resident Donnie Morrison show the shaking that occurred during the quake on July 5, 2019. 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