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Person

Robert W Graves

Research Geophysicist
Email: rwgraves@usgs.gov
Office Phone: 626-583-7239
Fax: 626-583-7827
ORCID: 0000-0001-9758-453X

Location
525 South Wilson Ave.
Pasadena , CA 91106-3212
US
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This Data Release consists of broadband ground motion simulations for 12 California region earthquakes. The ground motion simulations were done as part of a validation study that is described in more detail in Graves (2022). These simulations were computed using a hybrid simulation methodology (hereafter referred to as GP). The GP approach is a hybrid in that separate responses are computed for the low- and high-frequency components, which are then summed together to produce the full broadband response. The 12 earthquakes considered in Graves, R.W. (2022). Using a Grid-Search Approach to Validate the Graves-Pitarka Broadband Simulation Method, Earth, Planets and Space, 74:186, doi: 10.1186/s40623-022-01742-y, are...
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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...
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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 Hayward and Calaveras faults in the San Francisco Bay region. The fault locations and orientations are based on the 2023 USGS National Seismic Hazard Model. Both faults have creeping zones, and a simple scheme is employed in the kinematic rupture generator to taper the coseismic slip in the upper 10 km based on the ratio...
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