Robert W Graves
Rob Graves is a geophysicist in the Earthquake Science Center.
Science and Products
Filter Total Items: 66
Shallow basin structure and attenuation are key to predicting long shaking duration in Los Angeles Basin Shallow basin structure and attenuation are key to predicting long shaking duration in Los Angeles Basin
Ground motions in the Los Angeles Basin during large earthquakes are modulated by earthquake ruptures, path effects into the basin, basin effects, and local site response. We analyzed the direct effect of shallow basin structures on shaking duration at a period of 2–10 s in the Los Angeles region through modeling small magnitude, shallow, and deep earthquake pairs. The source depth...
Authors
Voon H Lai, Robert Graves, Chunquan Yu, Zhongwen Zhan, Don Helmberger
The 1933 Long Beach Earthquake (California, USA): Ground motions and rupture scenario The 1933 Long Beach Earthquake (California, USA): Ground motions and rupture scenario
We present a synoptic analysis of the ground motions from the 11 March 1933 Mw 6.4 Long Beach, California, earthquake, the largest known earthquake within the central Los Angeles Basin region. Our inferred shaking intensity pattern supports the association of the earthquake with the Newport-Inglewood fault; it further illuminates the concentration of severe damage in the town of Compton...
Authors
Susan E. Hough, Robert Graves
Near-field ground motions from the July, 2019 Ridgecrest, California, earthquake sequence Near-field ground motions from the July, 2019 Ridgecrest, California, earthquake sequence
The 2019 Ridgecrest, California, earthquake sequence, including an Mw 6.4 event on 4 July and an Mw 7.1 approximately 34 hr later, was recorded by 15 instruments within 55 km nearest‐fault distance. To characterize and explore near‐field ground motions from the Mw 6.4 foreshock and Mw 7.1 mainshock, we augment these records with available macroseismic information, including conventional
Authors
Susan E. Hough, Eric M. Thompson, Grace A. Parker, Robert Graves, Kenneth W. Hudnut, Jason Patton, Timothy E. Dawson, Tyler C. Ladinsky, Michael Oskin, Krittanon Sirorattanakul, Kelly Blake, Annemarie S. Baltay Sundstrom, Elizabeth S. Cochran
Hybrid broadband ground motion simulation validation of small magnitude earthquakes in Canterbury, New Zealand Hybrid broadband ground motion simulation validation of small magnitude earthquakes in Canterbury, New Zealand
Ground motion simulation validation is an important and necessary task toward establishing the efficacy of physics-based ground motion simulations for seismic hazard analysis and earthquake engineering applications. This article presents a comprehensive validation of the commonly used Graves and Pitarka hybrid broadband ground motion simulation methodology with a recently developed three
Authors
Robin L. Lee, Brendon A. Bradley, Peter J. Stafford, Robert Graves, Adrian Rodriguez-Marek
Kinematic rupture modeling of ground motion from the M7 Kumamoto, Japan earthquake Kinematic rupture modeling of ground motion from the M7 Kumamoto, Japan earthquake
We analyzed a kinematic earthquake rupture generator that combines the randomized spatial field approach of Graves and Pitarka (Bull Seismol Soc Am 106:2136–2153, 2016) (GP2016) with the multiple asperity characterization approach of Irikura and Miyake (Pure Appl Geophys 168:85–104, 2011) (IM2011, also known as Irikura recipe). The rupture generator uses a multi-scale hybrid approach...
Authors
Arben Pitarka, Robert Graves, Kojiro Irikura, Ken Miyakoshi, Artie Rogers
Validating ground-motion simulations on rough faults in complex 3D media Validating ground-motion simulations on rough faults in complex 3D media
We utilize a two-step process to validate 0-4 Hz ground motion simulations using the 1989 Loma Prieta earthquake. In the first step we run multiple realizations using the Graves and Pitarka hybrid method as implemented on the SCEC Broadband Simulation Platform and compare these with near-fault (R 40 km) recorded motions. A total of 648 rupture scenarios are examined and from these...
Authors
Robert Graves, Arben Pitarka
Science and Products
Filter Total Items: 66
Shallow basin structure and attenuation are key to predicting long shaking duration in Los Angeles Basin Shallow basin structure and attenuation are key to predicting long shaking duration in Los Angeles Basin
Ground motions in the Los Angeles Basin during large earthquakes are modulated by earthquake ruptures, path effects into the basin, basin effects, and local site response. We analyzed the direct effect of shallow basin structures on shaking duration at a period of 2–10 s in the Los Angeles region through modeling small magnitude, shallow, and deep earthquake pairs. The source depth...
Authors
Voon H Lai, Robert Graves, Chunquan Yu, Zhongwen Zhan, Don Helmberger
The 1933 Long Beach Earthquake (California, USA): Ground motions and rupture scenario The 1933 Long Beach Earthquake (California, USA): Ground motions and rupture scenario
We present a synoptic analysis of the ground motions from the 11 March 1933 Mw 6.4 Long Beach, California, earthquake, the largest known earthquake within the central Los Angeles Basin region. Our inferred shaking intensity pattern supports the association of the earthquake with the Newport-Inglewood fault; it further illuminates the concentration of severe damage in the town of Compton...
Authors
Susan E. Hough, Robert Graves
Near-field ground motions from the July, 2019 Ridgecrest, California, earthquake sequence Near-field ground motions from the July, 2019 Ridgecrest, California, earthquake sequence
The 2019 Ridgecrest, California, earthquake sequence, including an Mw 6.4 event on 4 July and an Mw 7.1 approximately 34 hr later, was recorded by 15 instruments within 55 km nearest‐fault distance. To characterize and explore near‐field ground motions from the Mw 6.4 foreshock and Mw 7.1 mainshock, we augment these records with available macroseismic information, including conventional
Authors
Susan E. Hough, Eric M. Thompson, Grace A. Parker, Robert Graves, Kenneth W. Hudnut, Jason Patton, Timothy E. Dawson, Tyler C. Ladinsky, Michael Oskin, Krittanon Sirorattanakul, Kelly Blake, Annemarie S. Baltay Sundstrom, Elizabeth S. Cochran
Hybrid broadband ground motion simulation validation of small magnitude earthquakes in Canterbury, New Zealand Hybrid broadband ground motion simulation validation of small magnitude earthquakes in Canterbury, New Zealand
Ground motion simulation validation is an important and necessary task toward establishing the efficacy of physics-based ground motion simulations for seismic hazard analysis and earthquake engineering applications. This article presents a comprehensive validation of the commonly used Graves and Pitarka hybrid broadband ground motion simulation methodology with a recently developed three
Authors
Robin L. Lee, Brendon A. Bradley, Peter J. Stafford, Robert Graves, Adrian Rodriguez-Marek
Kinematic rupture modeling of ground motion from the M7 Kumamoto, Japan earthquake Kinematic rupture modeling of ground motion from the M7 Kumamoto, Japan earthquake
We analyzed a kinematic earthquake rupture generator that combines the randomized spatial field approach of Graves and Pitarka (Bull Seismol Soc Am 106:2136–2153, 2016) (GP2016) with the multiple asperity characterization approach of Irikura and Miyake (Pure Appl Geophys 168:85–104, 2011) (IM2011, also known as Irikura recipe). The rupture generator uses a multi-scale hybrid approach...
Authors
Arben Pitarka, Robert Graves, Kojiro Irikura, Ken Miyakoshi, Artie Rogers
Validating ground-motion simulations on rough faults in complex 3D media Validating ground-motion simulations on rough faults in complex 3D media
We utilize a two-step process to validate 0-4 Hz ground motion simulations using the 1989 Loma Prieta earthquake. In the first step we run multiple realizations using the Graves and Pitarka hybrid method as implemented on the SCEC Broadband Simulation Platform and compare these with near-fault (R 40 km) recorded motions. A total of 648 rupture scenarios are examined and from these...
Authors
Robert Graves, Arben Pitarka