Empirical Linear Seismic Site Amplification in Central and Eastern North America

Parker, Grace A.; Stewart, Jonathan P.; Hashash, Youssef M. A.; Rathje, Ellen M.; Campbell, Kenneth W.; Silva, Walter J.

doi:10.1193/083117eqs170m

Cited by 36 publications

(46 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is due to a number of factors, including a lack of V S 30 information at seismographic sites in CENA (addressed in NGA-East by the development of a regional, proxy-based V S 30 -prediction model; Parker et al, 2017). 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.…”

Section: Prior Workmentioning

confidence: 99%

“…They find that the data-derived peak frequencies are more effective than V S 30 at predicting site effects in the CENA data. 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%

“…Figure 6 (for periods of 0.1 and 1.0 s) and the electronic supplement (for PGV and oscillator periods of 0.08, 0.2, 0.3, 0.4, 0.5, 0.8, 2.0, 3.0, 4.0, and 5.0 s) present the considered CENA site amplification models. The models are overlain on inferred site amplifications from observations, which are taken as the mean for each site of within-event rock residuals from Parker et al (2019). Also shown for comparison is the Seyhan and Stewart (2014) model for active tectonic regions (denoted SS14) and the site factors in the NEHRP provisions for periods of 0.2 and 1.0 s.…”

Section: Fv Model Developmentmentioning

confidence: 99%

“…SS14: Seyhan and Stewart (2014) for active regions, for PGA r = 0 (linear site amplification only) and for PGA r = 0.1 g (as used for developing current NEHRP site factors). GWG-E G and GWG-E NG: Geotechnical Working Group empirically based model for glaciated and nonglaciated regions, respectively (Parker et al, 2019). GWG-S: Geotechnical Working Group simulation-based model (Harmon et al, 2019b).…”

Section: Fv Model Developmentmentioning

confidence: 99%

See 4 more Smart Citations

Ergodic site amplification model for central and eastern North America

et al. 2020

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Prior Workmentioning

confidence: 99%

Section: Prior Workmentioning

confidence: 99%

Section: Fv Model Developmentmentioning

confidence: 99%

Section: Fv Model Developmentmentioning

confidence: 99%

Section: Fv Model Developmentmentioning

confidence: 99%

See 3 more Smart Citations

Ergodic site amplification model for central and eastern North America

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

Characterization of strong‐motion recording sites in the Himalayas and adjoining areas

Gupta

Kumari

2023

Earthquake Engineering and Resilience

View full text Add to dashboard Cite

In this paper, an attempt has been made to arrive at sufficiently realistic estimates of the average shear-wave velocity in the top 30 m of the ground (V S30 ) for 200 strong motion recording sites spread over the Himalayas, adjoining Indo-Gangetic plains and northeast Indian regions. This is achieved by extending the application of the horizontal to vertical spectral ratio (HVSR) method for the strong motion recording sites with a limited number of records. The knowledge of surface geology at the recording sites and the V S30 estimates based on the topographic slope method has been utilized as supplementary information to arrive at a good first-order approximation of V S30 for the sites with a single record also. A total of 669 three-component acceleration records have been obtained at the 200 sites considered from 158 different earthquakes in the magnitude range of 2.3-7.9 during 1986-2015. It had not been possible to use this database fruitfully due to lack of the required site characterization. Compared to the costly and time-taking field studies required for the estimation of exact site-specific values, the proposed scheme can be considered to provide a convenient methodology for obtaining sufficiently reliable approximations of V S30 from the recorded strong motion data. The V S30 values obtained in this study are found to be in very good agreement with the site-specific experimental values available for 29 of the sites, establishing the validity of the proposed scheme. An alternative site characterization is also provided in terms of the site soil and the local geological conditions, both defined in terms of three categories specified by indicator variables with values of 0, 1 and 2. Lee and Trifunac have illustrated that this characterization has stronger correlation with the ground motion amplitudes than the V S30 as well as the NEHRP site classes based on broad intervals of V S30 . The site characterization of the 200 strong motion recording sites in the present study will find useful applications in developing region-specific empirical ground motion prediction equations with the site amplification effects modeled realistically and in selecting suitable equations from the published literature using score-based data-driven methods.

show abstract

Ground-motion prediction models for induced earthquakes in the Groningen gas field, the Netherlands

et al. 2022

View full text Add to dashboard Cite

Small-magnitude earthquakes induced by gas production in the Groningen field in the Netherlands have prompted the development of seismic risk models that serve both to estimate the impact of these events and to explore the efficacy of different risk mitigation strategies. A core element of the risk modelling is ground-motion prediction models (GMPM) derived from an extensive database of recordings obtained from a dense network of accelerographs installed in the field. For the verification of damage claims, an empirical GMPM for peak ground velocity (PGV) has been developed, which predicts horizontal PGV as a function of local magnitude, ML; hypocentral distance, Rhyp; and the time-averaged shear-wave velocity over the upper 30 m, VS30. For modelling the risk due to potential induced and triggered earthquakes of larger magnitude, a GMPM for response spectral accelerations has been developed from regressions on the outputs from finite-rupture simulations of motions at a deeply buried rock horizon. The GMPM for rock motions is coupled with a zonation map defining frequency-dependent non-linear amplification factors to obtain estimates of surface motions in the region of thick deposits of soft soils. The GMPM for spectral accelerations is formulated within a logic-tree framework to capture the epistemic uncertainty associated with extrapolation from recordings of events of ML ≤ 3.6 to much larger magnitudes.

show abstract

Empirical Linear Seismic Site Amplification in Central and Eastern North America

Cited by 36 publications

References 54 publications

Ergodic site amplification model for central and eastern North America

Ergodic site amplification model for central and eastern North America

Characterization of strong‐motion recording sites in the Himalayas and adjoining areas

Ground-motion prediction models for induced earthquakes in the Groningen gas field, the Netherlands

Contact Info

Product

Resources

About