David R. Shelly 20200102 tabular digital data Accompanying manuscript: A High-Resolution Seismic Catalog for the Initial 2019 Ridgecrest Earthquake Sequence: Foreshocks, Aftershocks, and Faulting Complexity, IP-113928 https://doi.org/10.5066/P9JN6H0N David R. Shelly 20200122 publication n/a Seismological Society of America (SSA) https://doi.org/10.1785/0220190309 I use template matching and precise relative relocation techniques to develop a high-resolution earthquake catalog for the initial portion of the 2019 Ridgecrest earthquake sequence, from July 4-16, encompassing the foreshock sequence and the first 10+ days of aftershocks following the Mw 7.1 mainshock. Using 13,525 routinely cataloged events as waveform templates, I detect and precisely locate a total of 34,091 events. Precisely located earthquakes reveal numerous cross-cutting fault structures with dominantly perpendicular SW- and NW-strikes. Foreshocks of the Mw 6.4 event appear to align on a NW-striking fault. Aftershocks of the Mw 6.4 event suggest that it further ruptured this NW-striking fault, as well as the SW-striking fault where surface rupture was observed. Finally, aftershocks of the Mw 7.1 show a highly complex distribution, illuminating a primary NW-striking fault zone consistent with surface rupture, but also numerous cross-cutting SW-striking faults. Aftershock relocations suggest that the Mw 7.1 event ruptured adjacent to the previous NW-striking rupture of the Mw 6.4, perhaps activating a subparallel structure southwest of the earlier rupture. Both the NW and SE rupture termini of the Mw 7.1 rupture exhibited multiple-fault branching, with particularly high rates of aftershocks and multiple fault orientations in the dilatational quadrant NE of the NW rupture terminus. Data constrain structure and behavior of 2019 Ridgecrest earthquake sequence 20190704 20190716 ground condition Complete None planned -180.0 180.0 90.0 -90.0 World ISO 19115 Topic Category biota Marine Realms Information Bank (MRIB) keywords volcanology USGS Thesaurus earthquake occurrences USGS Metadata Identifier USGS:5dd715f3e4b0695797650d18 Common geographic areas California South None. Please see 'Distribution Info' for details. None. Users are advised to read the data set's metadata thoroughly to understand appropriate use and data limitations. U.S. Geological Survey - ScienceBase mailing

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Denver CO 80225 1-888-275-8747 sciencebase@usgs.govplace Not assessed See accompanying manuscript See accompanying manuscript See accompanying manuscript 20190701 YYYY year of earthquake origin time MM month dd day hh hour mm minute ss.sss seconds lat latitude(degrees) lon longitude(degrees) depth depth in km below Kilauea summit at 1.2 km above see level) mag earthquake magnitude ID event identifier High resolution earthquake catalogs from the 2019 Ridgecrest earthquake sequence GS ScienceBase U.S. Geological Survey mailing address

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Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P9JN6H0N None 20200818 U.S. Geological Survey - ScienceBase mailing

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Denver CO 80225 1-888-275-8747 sciencebase@usgs.gov FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata FGDC-STD-001.1-1999