Digital Datasets Documenting Surface Fault Rupture and Ground Deformation Features Produced by the Ridgecrest M6.4 and M7.1 Earthquake Sequence of July 4 and 5, 2019
Dates
Start Date
2019-07-04
End Date
2019-12-19
Publication Date
2020-07-14
Citation
Ponti, D.J., Blair, J.L., Rosa, C.M., Thomas, K., Pickering, A.J., Dawson, T. E., compilers, 2020, Digital datasets documenting surface fault rupture and ground deformation features produced by the Ridgecrest M6.4 and M7.1 earthquake sequence of July 4 and 5, 2019: U.S. Geological Survey data release, https://doi.org/10.5066/P9BZ5IJ9.
Summary
This product is a collection of digital data that document fault rupture and ground-deformation features produced by the Ridgecrest M6.4 and M7.1 earthquake sequence of July 4 and 5, 2019. These datasets are described and more fully discussed in Ponti and others (2020) (see External Resources Section below for the full reference). Included in this collection are: GIS Shapefile and KMZ file of field-verified fault rupture and ground deformation features from direct field mapping, or interpreted from ground observations, airborne and satellite optical imagery, digital surface models derived from lidar and structure-from-motion optical image analysis, sub-pixel correlation of multi-temporal optical imagery, and phase gradient maps from [...]
Summary
This product is a collection of digital data that document fault rupture and ground-deformation features produced by the Ridgecrest M6.4 and M7.1 earthquake sequence of July 4 and 5, 2019. These datasets are described and more fully discussed in Ponti and others (2020) (see External Resources Section below for the full reference). Included in this collection are:
GIS Shapefile and KMZ file of field-verified fault rupture and ground deformation features from direct field mapping, or interpreted from ground observations, airborne and satellite optical imagery, digital surface models derived from lidar and structure-from-motion optical image analysis, sub-pixel correlation of multi-temporal optical imagery, and phase gradient maps from coseismic radar interferograms;
Comma-separated text and KMZ files of field observations at sites of fault rupture and ground deformation where quantitative displacement measurements were obtained.
As discussed in Ponti and others (2020), this data release will be updated as additional data products become available. Anticipated future releases will include:
updated observations at sites where quantataive displacement measurements were obtained, including ground photographs of described features
additional qualitative ground deformation observations, including associated photographs
Click on title to download individual files attached to this item.
Related External Resources
Type: Related Primary Publication
Ponti and others, 2020, Documentation of surface fault rupture and ground-deformation features produced by the 4 and 5 July 2019 Mw 6.4 and Mw 7.1 Ridgecrest earthquake sequence
To document the surface effects of the Ridgecrest M6.4 and M7.1 earthquake sequence of July 4 and 5, 2019, data were obtained from numerous investigators (identified in the individual child items). Field documentation of earthquake effects, including the length and continuity of surface faulting, amount and sense of fault slip, and the occurrence and nature of shaking-induced ground failure, is fundamental to evaluating earthquake processes and for assessing earthquake hazards. In the case of the Ridgecrest earthquake sequence, post-earthquake geologic activities included an initial reconnaissance phase during the first few days after the events, followed by a data collection phase that extended into December of 2019. The initial reconnaissance phase focused on quickly determining overall fault rupture location and extent, maximum coseismic surface fault slip, possible post-seismic creep, and areas and extent of ground failure due to liquefaction and slope failure. This information provided critical situational awareness for emergency response and recovery efforts, for guiding seismic and geodetic instrument deployments, and for acquiring airborne lidar and other imagery to support follow-on research. The data collection phase included detailed ground observations and both ground and airborne mapping of faulting and ground deformation features. Detailed field measurements of slip vectors derived from offset features or observed slickenlines on fault planes provide insight into rupture dynamics and fault kinematics. Slip distributions along strike and data on rupture extent offer important constraints for finite fault models, dynamic rupture simulations, and strong ground motion modeling and facilitate the comparison of field-based and remotely sensed observations. Maps of fault rupture provide insights into cross-fault interactions and how faults may, or may not, be linked. Maps detailing rupture complexity and the association of coseismic rupture with existing tectonic geomorphology provide important insights into long-term fault activity and for refining fault hazard zones. Reconnaissance teams also identified and documented localized slip on both previously mapped and unmapped faults, further highlighting other potentially active fault zones within the region.
Rights
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