Site‐Effects Model for Central and Eastern North America Based on Peak Frequency

Hassani, Behzad; Atkinson, Gail M.

doi:10.1785/0120160049

Cited by 50 publications

(60 citation statements)

References 32 publications

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“…Parker et al (2019) present an empirical linear site amplification model, conditioned on V S 30 , which was developed by the NGA-East Geotechnical Working Group (GWG). Hassani and Atkinson (2016b) derived the frequency of peaks in H/V spectral ratios using CENA data and used those peak frequencies as predictive parameters for analysis of site effects. They find that the data-derived peak frequencies are more effective than V S 30 at predicting site effects in the CENA data.…”

Section: Prior Workmentioning

confidence: 99%

“…Additional literature review on CENA empirical site amplification is presented by Parker et al (2019). The panel considered the GWG and Hassani and Atkinson (2016b) empirical models.…”

Section: Prior Workmentioning

confidence: 99%

“…We consider two empirical models: (1) a model relating site amplification to peak frequency ( f peak ) from horizontal-to-vertical spectral ratios (HVSRs) using NGA-East data for CENA (Hassani and Atkinson, 2016b) and (2) an empirical V S 30 -scaling model developed by the NGA-East Geotechnical Working Group (referred to subsequently as GWG-E; Parker et al, 2019). Additional empirical models that were considered but ultimately not used are Hollenback et al (2015), Al Noman and Cramer (2015), and Graizer (2015).…”

Section: Fv Model Developmentmentioning

confidence: 99%

“…Upon the completion of the panel’s analysis work, a new model was published (Hassani and Atkinson, 2018). Although the principal emphasis of that model was to show the effectiveness of site frequency as a site parameter (building on the work of Hassani and Atkinson, 2016b), they also developed a model based on V S 30 only. Because the V S 30 -scaling in that model is similar to GWG-E, a renewal of panel activity to formally consider the Hassani and Atkinson (2018) model was considered unnecessary.…”

Section: Fv Model Developmentmentioning

confidence: 99%

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Ergodic site amplification model for central and eastern North America

et al. 2020

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The United States Geological Survey national seismic hazard maps have historically been produced for a reference site condition of VS30 = 760 m/s. For other site conditions, site factors are used, which heretofore have been developed using ground motion data and simulations for shallow earthquakes in active tectonic regions. Research results from the Next Generation Attenuation–East (NGA-East) project, as well as previous and contemporaneous related research, demonstrate different levels of site amplification in central and eastern North America (CENA) as compared to active regions. We provide recommendations for modeling of ergodic site amplification in CENA based primarily on research results from the literature. The recommended model has three additive terms in natural logarithmic units. Two describe linear site amplification: an empirically constrained VS30-scaling term relative to a 760 m/s reference and a simulation-based term to adjust site amplification from the 760 m/s reference to the CENA reference of VS = 3000 m/s. The third term is a nonlinear model that is described in a companion document. All median model components are accompanied by epistemic uncertainty models.

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Section: Prior Workmentioning

confidence: 99%

“…Additional literature review on CENA empirical site amplification is presented by Parker et al (2019). The panel considered the GWG and Hassani and Atkinson (2016b) empirical models.…”

Section: Prior Workmentioning

confidence: 99%

Section: Fv Model Developmentmentioning

confidence: 99%

Section: Fv Model Developmentmentioning

confidence: 99%

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Ergodic site amplification model for central and eastern North America

et al. 2020

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“…Additional parameters, such as the natural frequency of the site, are being investigated for improving the regional site characterization in a variety of applications (e.g. Cadet et al, 2010;Motazedian et al, 2011;Hassani and Atkinson, 2016).…”

Section: Introductionmentioning

confidence: 99%

Developing a Geologically Based VS30 Site‐Condition Model for Portugal: Methodology and Assessment of the Performance of Proxies

Vilanova

Narciso

Carvalho

et al. 2018

Bulletin of the Seismological Society of America

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The inclusion of site-specific conditions is essential to adequately represent the seismic hazard and the seismic risk for a region. We acquired, gathered and organized a near surface shear-wave velocity database for Portugal, and applied a three-step methodological approach for developing a V S30 site-conditions map using extrapolation based on surface geology. The methodology includes: 1) defining a preliminary set of geologically defined units; 2) calculating the probability distribution of log V S30 for each unit; and 3) merging the units according to the results of statistical tests. The final model comprises three geologically defined units characterized by log V S30 distributions that are statistically significantly different from each other: F1-Igneous, metamorphic and old sedimentary rocks; F2-Neogene and Pleistocene formations; and F3-Holocene formations. The site conditions for F3 unit may be further refined using correlations with topographic slope based on the SRTM3 dataset. We analysed the performance site-conditions models based on correlations with exogenous data (topographic slope and surface geology analogues). The results show that the residual distributions between log V S30 values measured and estimated from those proxies are strongly biased for some geological units, emphasizing the need for acquiring regional V S data.

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Ground motion prediction equations for the horizontal component from shallow crustal and upper mantle earthquakes in Japan using site period as site parameter

Hou,

Zhao

2023

Bull Earthquake Eng

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Site‐Effects Model for Central and Eastern North America Based on Peak Frequency

Cited by 50 publications

References 32 publications

Ergodic site amplification model for central and eastern North America

Ergodic site amplification model for central and eastern North America

Developing a Geologically Based VS30 Site‐Condition Model for Portugal: Methodology and Assessment of the Performance of Proxies

Ground motion prediction equations for the horizontal component from shallow crustal and upper mantle earthquakes in Japan using site period as site parameter

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