Robert W Graves
Rob Graves is a geophysicist in the Earthquake Science Center.
Science and Products
Filter Total Items: 66
Recent applications of the USGS National Crustal Model for Seismic Hazard Studies Recent applications of the USGS National Crustal Model for Seismic Hazard Studies
The U.S. Geological Survey is developing the National Crustal Model (NCM) for seismic hazard studies to facilitate modeling site, path, and source components of seismic hazard across the conterminous United States. The NCM is composed of a 1km grid of geophysical profiles, extending from the Earth’s surface into the upper mantle. It is constructed from a threedimensional (3D) geologic...
Authors
Oliver S. Boyd, James Andrew Smith, Morgan P. Moschetti, Brad T. Aagaard, Robert Graves, Evan Tyler Hirakawa, Sean Kamran Ahdi
Modern products for a vintage event: An update on the 1933 Long Beach, California, earthquake Modern products for a vintage event: An update on the 1933 Long Beach, California, earthquake
When a notable earthquake occurs in the United States, a range of familiar real‐ and near‐real‐time products are produced by the U.S. Geological Survey (USGS) Advanced National Seismic System (ANSS), and made available via the ANSS Comprehensive Earthquake Catalog. For historical and early instrumental earthquakes, similar results and products are developed depending on data availability...
Authors
Susan E. Hough, J. Luke Blair, Sonia Ellison, Robert Graves, Scott Haefner, Eric M. Thompson, Nicholas van der Elst, Morgan T. Page, David J. Wald
Comparison of nonergodic ground-motion components from CyberShake and NGA-West2 datasets in California Comparison of nonergodic ground-motion components from CyberShake and NGA-West2 datasets in California
In this study, we compare the Southern California Earthquake Center CyberShake platform against the Next Generation Attenuation‐West2 empirical datasets. Because the CyberShake and empirical datasets cover very different magnitude ranges and site conditions, we develop ground‐motion models (GMMs) for CyberShake datasets to compare trends with empirical GMMs and decompose the residuals...
Authors
Xiaofeng Meng, Christine Goulet, Kevin R. Milner, Robert Graves, Scott Callaghan
Using a grid-search approach to validate the Graves-Pitarka broadband simulation method Using a grid-search approach to validate the Graves-Pitarka broadband simulation method
This work assesses the ability of the Graves–Pitarka simulation approach to reproduce observed ground motions for 12 California and Baja California earthquakes. A total of 240 realizations are computed for each earthquake and compared with recorded strong motions from near-fault sites. In addition to spatial variability in slip, each realization samples from discrete combinations of...
Authors
Robert Graves
Hybrid broadband ground-motion simulation validation of small magnitude active shallow crustal earthquakes in New Zealand Hybrid broadband ground-motion simulation validation of small magnitude active shallow crustal earthquakes in New Zealand
This article presents a comprehensive validation of the hybrid broadband ground-motion simulation approach (via the commonly used Graves and Pitarka method) in a New Zealand context with small magnitude point source ruptures using an extensive set of 5218 ground motions recorded at 212 sites from 479 active shallow crustal earthquakes across the country. Modifications to the simulation...
Authors
Robin L. Lee, Brendon A. Bradley, Peter J. Stafford, Robert Graves, Adrian Rodriguez-Marek
Validating predicted site response in sedimentary basins from 3D ground motion simulations Validating predicted site response in sedimentary basins from 3D ground motion simulations
We introduce procedures to validate site response in sedimentary basins as predicted using ground motion simulations. These procedures aim to isolate contributions of site response to computed intensity measures relative to those from seismic source and path effects. In one of the validation procedures, simulated motions are analyzed in the same manner as earthquake recordings to derive...
Authors
Chukwuebuka C Nweke, Jonathan P. Stewart, Robert Graves, Christine A. Goulet, Scott J Brandenberg
Science and Products
Filter Total Items: 66
Recent applications of the USGS National Crustal Model for Seismic Hazard Studies Recent applications of the USGS National Crustal Model for Seismic Hazard Studies
The U.S. Geological Survey is developing the National Crustal Model (NCM) for seismic hazard studies to facilitate modeling site, path, and source components of seismic hazard across the conterminous United States. The NCM is composed of a 1km grid of geophysical profiles, extending from the Earth’s surface into the upper mantle. It is constructed from a threedimensional (3D) geologic...
Authors
Oliver S. Boyd, James Andrew Smith, Morgan P. Moschetti, Brad T. Aagaard, Robert Graves, Evan Tyler Hirakawa, Sean Kamran Ahdi
Modern products for a vintage event: An update on the 1933 Long Beach, California, earthquake Modern products for a vintage event: An update on the 1933 Long Beach, California, earthquake
When a notable earthquake occurs in the United States, a range of familiar real‐ and near‐real‐time products are produced by the U.S. Geological Survey (USGS) Advanced National Seismic System (ANSS), and made available via the ANSS Comprehensive Earthquake Catalog. For historical and early instrumental earthquakes, similar results and products are developed depending on data availability...
Authors
Susan E. Hough, J. Luke Blair, Sonia Ellison, Robert Graves, Scott Haefner, Eric M. Thompson, Nicholas van der Elst, Morgan T. Page, David J. Wald
Comparison of nonergodic ground-motion components from CyberShake and NGA-West2 datasets in California Comparison of nonergodic ground-motion components from CyberShake and NGA-West2 datasets in California
In this study, we compare the Southern California Earthquake Center CyberShake platform against the Next Generation Attenuation‐West2 empirical datasets. Because the CyberShake and empirical datasets cover very different magnitude ranges and site conditions, we develop ground‐motion models (GMMs) for CyberShake datasets to compare trends with empirical GMMs and decompose the residuals...
Authors
Xiaofeng Meng, Christine Goulet, Kevin R. Milner, Robert Graves, Scott Callaghan
Using a grid-search approach to validate the Graves-Pitarka broadband simulation method Using a grid-search approach to validate the Graves-Pitarka broadband simulation method
This work assesses the ability of the Graves–Pitarka simulation approach to reproduce observed ground motions for 12 California and Baja California earthquakes. A total of 240 realizations are computed for each earthquake and compared with recorded strong motions from near-fault sites. In addition to spatial variability in slip, each realization samples from discrete combinations of...
Authors
Robert Graves
Hybrid broadband ground-motion simulation validation of small magnitude active shallow crustal earthquakes in New Zealand Hybrid broadband ground-motion simulation validation of small magnitude active shallow crustal earthquakes in New Zealand
This article presents a comprehensive validation of the hybrid broadband ground-motion simulation approach (via the commonly used Graves and Pitarka method) in a New Zealand context with small magnitude point source ruptures using an extensive set of 5218 ground motions recorded at 212 sites from 479 active shallow crustal earthquakes across the country. Modifications to the simulation...
Authors
Robin L. Lee, Brendon A. Bradley, Peter J. Stafford, Robert Graves, Adrian Rodriguez-Marek
Validating predicted site response in sedimentary basins from 3D ground motion simulations Validating predicted site response in sedimentary basins from 3D ground motion simulations
We introduce procedures to validate site response in sedimentary basins as predicted using ground motion simulations. These procedures aim to isolate contributions of site response to computed intensity measures relative to those from seismic source and path effects. In one of the validation procedures, simulated motions are analyzed in the same manner as earthquake recordings to derive...
Authors
Chukwuebuka C Nweke, Jonathan P. Stewart, Robert Graves, Christine A. Goulet, Scott J Brandenberg