Broadband (0–4 Hz) Ground Motions for a Magnitude 7.0 Hayward Fault Earthquake With Three‐Dimensional Structure and Topography
[1];
[3];
- Atmospheric, Earth and Energy Division and Geophysical Monitoring Program Lawrence Livermore National Laboratory Livermore CA USA, Energy Geosciences Division Lawrence Berkeley National Laboratory Berkeley CA USA, Berkeley Seismological Laboratory University of California Berkeley CA USA
- Atmospheric, Earth and Energy Division and Geophysical Monitoring Program Lawrence Livermore National Laboratory Livermore CA USA
- Center of Applied Scientific Computing Lawrence Livermore National Laboratory Livermore CA USA
- Energy Geosciences Division Lawrence Berkeley National Laboratory Berkeley CA USA, Office of the President University of California Oakland CA USA
We performed fully deterministic broadband (0–4 Hz) high-performance computing ground motion simulations of a magnitude 7.0 scenario earthquake on the Hayward Fault (HF) in the San Francisco Bay Area of Northern California. Simulations consider average one-dimensional (1-D) and three-dimensional (3-D) anelastic structure with flat and topographic free surfaces. Ground motion intensity measures (GMIMs) for the 3-D model display dramatic differences across the HF due to geologic heterogeneity, with low wave speeds east of the HF amplifying motions. The median GMIMs agree well with Ground Motion Prediction Equations (GMPEs); however, the 3-D model generates more scatter than the 1-D model. Ratios of 3-D/1-D GMIMs from the same source allow isolation of path and site effects for the 3-D model. These ratios show remarkably similar trends as site-specific factors for the GMPE predictions, suggesting that wave propagation effects in our 3-D simulations are on average consistent with empirical data.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)
- Grant/Contract Number:
- 17‐SC‐20‐SC; DE‐AC52‐07NA27344; AC52-07NA27344; AC02-05CH11231
- OSTI ID:
- 1418697
- Alternate ID(s):
- OSTI ID: 1418699; OSTI ID: 1458635; OSTI ID: 1485076
- Report Number(s):
- LLNL-JRNL-741500
- Journal Information:
- Geophysical Research Letters, Journal Name: Geophysical Research Letters Vol. 45 Journal Issue: 2; ISSN 0094-8276
- Publisher:
- American Geophysical Union (AGU)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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