Empirical ground motion models for the average horizontal component from shallow crustal earthquakes in active tectonic regions are derived using the PEER NGA-West2 database. The model is applicable to magnitudes 3.0–8.5, distances 0–300 km, and spectral periods of 0–10 s. The model input parameters are the same as those used by Abrahamson and Silva (2008), with the following exceptions: the loading level for nonlinear effects is based on the spectral acceleration at the period of interest rather than the PGA; and the distance scaling for hanging wall (HW) effects off the ends of the rupture includes a dependence on the source-to-site azimuth. Regional differences in large-distance attenuation and VS30 scaling between California, Japan, China, and Taiwan are included. The scaling for the HW effect is improved using constraints from numerical simulations. The standard deviation is magnitude-dependent, with smaller magnitudes leading to larger standard deviations at short periods, but smaller standard deviations at long periods. Directivity effects are not included through explicit parameters, but are captured through the variability of the empirical data.
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Research Article|
August 01, 2014
Summary of the ASK14 Ground Motion Relation for Active Crustal Regions
Norman A. Abrahamson, M. EERI;
Norman A. Abrahamson, M. EERI
a
Pacific Gas & Electric Company, 245 Market Street, San Francisco, CA 94105
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Walter J. Silva, M. EERI;
Walter J. Silva, M. EERI
b
Pacific Engineering and Analysis, 311 Pomona Ave, El Cerrito, CA 94546
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Ronnie Kamai, M. EERI
Ronnie Kamai, M. EERI
c
Ben-Gurion University of the Negev, Israel, 84105
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Earthquake Spectra (2014) 30 (3): 1025–1055.
Article history
received:
09 Jul 2013
accepted:
16 Jan 2014
first online:
01 Jun 2020
Citation
Norman A. Abrahamson, Walter J. Silva, Ronnie Kamai; Summary of the ASK14 Ground Motion Relation for Active Crustal Regions. Earthquake Spectra 2014;; 30 (3): 1025–1055. doi: https://doi.org/10.1193/070913EQS198M
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Index Terms/Descriptors
- acceleration
- aftershocks
- Asia
- attenuation
- California
- China
- crust
- data bases
- data processing
- earthquakes
- engineering geology
- equations
- Far East
- faults
- ground motion
- Japan
- loading
- magnitude
- neotectonics
- numerical models
- peak ground acceleration
- prediction
- regression analysis
- rupture
- scale factor
- simulation
- soil mechanics
- statistical analysis
- Taiwan
- tectonics
- United States
- velocity
- NGA-West2 project
- ASK14
Latitude & Longitude
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