Hybrid Empirical Ground-Motion Prediction Equations for Eastern North America Using NGA Models and Updated Seismological Parameters

Pezeshk, Shahram; Zandieh, Arash; Tavakoli, Behrooz

doi:10.1785/0120100144

Cited by 134 publications

(94 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 1 shows reference site condition ranging from 2.00 to 2:88 km=s for a number of GMPEs applicable to the CENA region (Toro et al, 1997;Campbell, 2003;Atkinson and Boore, 2006;Pezeshk et al, 2011). Those models are based on simulations, and hence the reference velocities reflect conditions at the top of assumed crustal profiles used in the simulations.…”

Section: Prior Recommendation On Reference Rockmentioning

confidence: 99%

Reference Rock Site Condition for Central and Eastern North America

Hashash

Kottke

Stewart

et al. 2014

Bulletin of the Seismological Society of America

View full text Add to dashboard Cite

The reference rock site condition has two important applications for ground-motion prediction in the stable continental region of central and eastern North America (CENA). (1) It represents the site condition for which ground motions are computed using semiempirical ground-motion prediction equations. In addition, (2) it represents the site condition to which site amplification factors, which are used to modify ground-motion intensity measures for softer site condition, are referenced (i.e., site amplification is unity for reference rock). We define reference rock by its shear (S)-and compression (P)-wave velocities, as well as a site attenuation parameter (κ 0 ), which is used in stochastic ground-motion simulation methods. Prior definitions of reference rock conditions in CENA were based mostly on indirect large-scale crustal velocity inversions and judgment. We compile and interpret a unique database of direct velocity measurements to develop criteria for assessing the presence of reference rock site condition based on measured seismic velocities and their gradient with respect to depth. We apply the criteria to available profiles and perform rigorous statistical analysis from which we recommend S-and P-wave velocities of 3000 and 5500 m=s, respectively, for the reference rock condition. We recommend that, for practical applications, use ranges of reference S-and P-wave velocities of 2700-3300 m=s and 5000-6100 m=s, respectively. The ranges are based on a 5% change in amplification using quarterwavelength theory. We do not find evidence for regional dependence of the reference velocities, which are derived principally from three general geographic regions: (1) Atlantic coast, (2) continental interior, and (3) Appalachian Mountains. Our data do not provide reference velocities for the Gulf Coast region. The recommended velocity-compatible reference rock site kappa is 0.006 s.

show abstract

Section: Prior Recommendation On Reference Rockmentioning

confidence: 99%

Reference Rock Site Condition for Central and Eastern North America

Hashash

Kottke

Stewart

et al. 2014

Bulletin of the Seismological Society of America

View full text Add to dashboard Cite

show abstract

“…Stochastic simulations are widely used to develop ground-motion prediction equations (GMPEs) as an alternative to empirical methods, particularly in stable continental regions where empirical data are limited (e.g., Boore, 1995, 2006;Toro et al, 1997;Campbell, 2003;Pezeshk et al, 2011;. Stochastic methods are a useful tool in engineering seismology due to their simplicity and success in predicting ground motions at frequencies of common engineering interest (Hanks and McGuire, 1981;Boore, 2003).…”

Section: Introductionmentioning

confidence: 99%

An Equivalent Point‐Source Model for Stochastic Simulation of Earthquake Ground Motions in California

Yenier¹,

Atkinson²

2015

Bulletin of the Seismological Society of America

View full text Add to dashboard Cite

Response spectra for California earthquakes of 3:0 ≤ M < 7:5 are well described by a simple stochastic ground-motion model using an equivalent point-source concept. We determine the best-fit stress parameter of each California earthquake in the Next Generation Attenuation-West 2 database based on matching simulated to observed response spectral shapes over a wide frequency range, and we derive an expression for the mean stress as a function of magnitude and focal depth. A calibration factor is calculated for each event; this constant is the required amplitude adjustment in order that the simulations match the observed response spectral amplitudes with zero bias. The best-fit simulation model suggests that the attenuation in California can be modeled as R −1:3 at distances < 50 km and R −0:5 at further distances; this does a better job at matching attenuation trends than the traditional model 1=R model at distances < 50 km, particularly for M < 5:5 events. The model requires an overall multiplicative calibration factor of C sim 3:16 in order for the simulations to match the observed response spectral amplitudes, for all magnitudes and distances. The calibration constant could be attributed to simplifications inherent in the modeling of source, attenuation, and site processes, and the lack of consideration of multiple phases in stochastic simulations. We conclude that the equivalent point-source simulation method with the proposed modeling parameters can predict average ground motions in California, generally within a 25% error band, for magnitudes up to M 7.5, distances < 400 km, and frequencies > 0:2 Hz. We finish the paper by providing a recipe for developing a simulation-based generic ground-motion prediction equation that can be adjusted for source and attenuation attributes in different regions by simple modifications to its key source and attenuation modeling parameters.

show abstract

“…Atkinson & Boore (2006), Silva et al (2002) and Pezeshk et al (2011) have been adopted for the stable continental crust with equal weighting. These two GEMPs are also recommended in Global Earthquake Model (GEM).…”

Section: Ground Motion Prediction Equationsmentioning

confidence: 99%

Seismic hazard assessment of South Korea

So¹,

Mote²,

Pappin³

2016

JGS Special Publication

View full text Add to dashboard Cite

Korea is located on the eastern margin of the Eurasian Plate. Although it is far from a plate boundary (the closest distance is about 400-500km), the seismicity is affected by the complex interaction of the collision of the Indo-Australian and the Eurasian plates, and the subduction of the Philippine Sea plates beneath the Eurasian plate along the Japan and the Ryukyu trenches respectively. This paper presents a study on seismic horizontal ground motions for rock sites in South Korea. As part of the study, historical and recent earthquakes have been used. A seismic source model has been developed which incorporates the Korean local tectonic and subduction of the Philippines Sea Plate. Also, recently published empirical and stochastic attenuation relationships have been have been adopted. The seismic hazard for spectral accelerations at structural periods of short period (0.1s) and 1.0 seconds having a 2% probability of being exceeded in the next 50 years are presented as hazard contour maps across South Korea. De-aggregation plots are also shown for a few major cities to investigate the earthquake magnitude and distance combinations. The results show that the subduction zones near Japan contribute significantly to the seismic hazard in South Korea particularly for the longer structural period ground motion.

show abstract

Hybrid Empirical Ground-Motion Prediction Equations for Eastern North America Using NGA Models and Updated Seismological Parameters

Cited by 134 publications

References 51 publications

Reference Rock Site Condition for Central and Eastern North America

Reference Rock Site Condition for Central and Eastern North America

An Equivalent Point‐Source Model for Stochastic Simulation of Earthquake Ground Motions in California

Seismic hazard assessment of South Korea

Contact Info

Product

Resources

About