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Broadband Ground Motion Simulations for an Earthquake “Doublet” on the Newport-Inglewood and Palos Verdes Faults

Dates

Publication Date
Time Period
2024-10-17

Citation

Graves, R.W., 2024, Broadband Ground Motion Simulations for an Earthquake “Doublet” on the Newport-Inglewood and Palos Verdes Faults: U.S. Geological Survey data release, https://doi.org/10.5066/P149DTBJ.

Summary

The occurrence and impact of the February 2023 earthquake doublet in Türkiye, where an Mw 7.8 event was followed roughly 9 hours later by an Mw 7.5 event on an adjacent fault, begs the question: What would be the impact of such a sequence in California? As part of the effort to address this question, this Data Release consists of simulated ground motions for a hypothetical doublet scenario on the Newport-Inglewood and Palos Verdes faults in the Los Angeles region. The fault locations and orientations are based on the 2023 USGS National Seismic Hazard Model. The magnitudes are Mw 7.25 for the 84-km Newport-Inglewood rupture and Mw 7.05 for the 70-km Palos Verdes rupture. Broadband ground motions are computed using a combination of deterministic [...]

Contacts

Point of Contact :
Robert W Graves, U.S. Geological Survey
Originator :
Robert W Graves
Metadata Contact :
Robert W Graves, U.S. Geological Survey
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
Natural Hazards
SDC Data Owner :
Earthquake Science Center

Attached Files

Click on title to download individual files attached to this item.

bbsim_newportinglewood-palosverdes.xml
Original FGDC Metadata
View 		31.52 KB application/fgdc+xml
grid-1.2x1.2_sc01-h0.080+vsurf+zvals.1+vs30.2+cd.txt 4.22 MB text/plain
21.94 GB application/gzip
22.01 GB application/gzip
newport-inglewood_srf.tgz 305.37 MB application/x-gzip
palosverdes_srf.tgz 177.52 MB application/x-gzip
scen_ni.as00_ff1_n34.0w118.0-a000-200x200x50-h0.100_fr32_1080x1180.mp4 15.15 MB video/mp4
scen_pv.as00_ff1_n34.0w118.0-a000-200x200x50-h0.100_fr32_1080x1180.mp4 15.02 MB video/mp4
simulation_m7.05_pv.as00_cvmsi.csv 8.74 MB text/csv
simulation_m7.25_ni.as00_cvmsi.csv 8.75 MB text/csv
srf-v2.0_rev1.pdf 567.5 KB application/pdf
g00000.bbp.txt 1.53 MB text/plain
README.txt 6.29 KB text/plain
sc-shakemovie4a.png thumbnail 2.01 MB image/png

Purpose

These data were simulated in order to facilitate assessment of potential impacts of an earthquake "doublet" occurring in the Los Angeles basin region of California. In an earthquake doublet, an initial large magnitude (M7+) earthquake is followed several hours later by another large magnitude event occurring in close proximity to the first event. The impact assessment must consider the cascade of effects related to both events, e.g., the first event partially damaging a structure leaving it in a compromised state, which is then again subjected to strong shaking in the second event. The simulated broadband three-component time series can be used in the same manner as recorded earthquake ground motion data in any application requiring the use of such data. Furthermore, the scenario ShakeMaps derived from the simulations can be utilized in any application requiring USGS ShakeMap data as input (e.g., regional loss estimation).

Rights

This work is marked with Creative Commons Zero v1.0 Universal (https://creativecommons.org/publicdomain/zero/1.0/).
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DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P149DTBJ

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