Empirical Models for Site- and Region-Dependent Ground-Motion Parameters in the Taipei Area: A Unified Approach

We calculated peak ground accelerations and response spectra for the Taipei area using stochastic simulation technique on the basis of recently obtained empirical models. The source, path and site effects were characterized separately on the basis of the analysis of a large collection of ground-motion recordings obtained since 1991 in the Taiwan area. The simple ω-squared Brune's point-source model combined with regional anelastic attenuation ( Q) and duration (τ0.9) models provide a satisfactory estimation of ground-motion parameters for rock sites. Effects of local site response are considered by means of empirical soil/bedrock spectral ratios calculated as ratios between spectra of actual earthquake records and those modeled for hypothetical “hard rock” site. The results of the simulation demonstrate that this combination of source, path and site response models provides an accurate prediction of “site- and region-dependent” ground-motion parameters for the Taipei basin for the broad range of earthquake magnitudes, distances and site conditions. The model, with a set of generic soil profiles, can be considered as an efficient tool for estimating of design input ground motion parameters in the Taipei basin both in deterministic (scenario earthquakes) and probabilistic (“site- and region-dependent” Uniform Hazard response spectra) seismic hazard assessment.

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Evaluating the effects of ground motion parameters on response spectra in Uttarakhand Himalayas, India

Arabian Journal of Geosciences ◽

10.1007/s12517-016-2747-5 ◽

2016 ◽

Vol 9 (18) ◽

Cited By ~ 1

Author(s):

Himanshu Mittal ◽

Yih-Min Wu ◽

Ashok Kumar ◽

Arjun Kumar ◽

Babita Sharma

Keyword(s):

Ground Motion ◽

Response Spectra ◽

Ground Motion Parameters ◽

Motion Parameters

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SEISMIC HAZARD ASSESSMENT IN THE BROADER AEGEAN AREA USING TIME-INDEPENDENT SEISMICITY MODELS BASED ON SYNTHETIC EARTHQUAKE CATALOGS

Bulletin of the Geological Society of Greece ◽

10.12681/bgsg.11859 ◽

2017 ◽

Vol 50 (3) ◽

pp. 1463

Author(s):

D.A. Vamvakaris ◽

C.B. Papazachos ◽

Ch.A. Papaioannou ◽

E.M. Scordilis ◽

G.F. Karakaisis

Keyword(s):

Seismic Hazard ◽

Ground Motion ◽

Hazard Assessment ◽

Seismic Hazard Assessment ◽

Aegean Area ◽

Ground Motion Parameters ◽

Earthquake Catalogs ◽

Seismic Zones ◽

Motion Parameters ◽

Synthetic Catalogs

In order to evaluate the seismic hazard for the broader Aegean area, a modified timeindependent seismicity model is used. A Monte-Carlo procedure has been employed to create synthetic earthquake catalogs with specific characteristics regarding their time, space and magnitude distributions. Moreover, particular geometrical characteristics, such as subducting and oblique seismic zones are also taken into account in the synthetic catalogs generation. A significantly revised earthquake catalog, all available fault plane solutions and information on the seismotectonics of the broader Aegean area were considered in order to propose a new updated model of seismic zones for this area. Seismicity parameters for the new seismic zones were calculated and the corresponding synthetic earthquake catalogs were generated using the proposed procedure. The distribution of the expected values for ground motion parameters (e.g. PGA, PGV) was estimated using synthetic catalogs for several sites of interest, by performing computations directly on all earthquakes of each catalog. Computations were performed for a dense grid of sites and seismic hazard estimates were determined both directly from the peak ground motion distribution, as well as from fitted extreme values Gumbel distribution. Ground motion parameters were also calculated using classic seismic hazard assessment algorithms (EqRISK), in order to evaluate the compatibility of the proposed method with conventional approaches.

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Erratum to Inslab Earthquakes of Central Mexico: Peak Ground-Motion Parameters and Response Spectra

Bulletin of the Seismological Society of America ◽

10.1785/0120090048 ◽

2009 ◽

Vol 99 (4) ◽

pp. 2607-2609 ◽

Cited By ~ 1

Author(s):

D. Garcia ◽

S. K. Singh ◽

M. Herraiz ◽

M. Ordaz ◽

J. Francisco Pacheco

Keyword(s):

Ground Motion ◽

Response Spectra ◽

Central Mexico ◽

Ground Motion Parameters ◽

Peak Ground Motion ◽

Motion Parameters

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Inslab Earthquakes of Central Mexico: Peak Ground-Motion Parameters and Response Spectra

Bulletin of the Seismological Society of America ◽

10.1785/0120050072 ◽

2005 ◽

Vol 95 (6) ◽

pp. 2272-2282 ◽

Cited By ~ 66

Author(s):

D. Garcia

Keyword(s):

Ground Motion ◽

Response Spectra ◽

Central Mexico ◽

Ground Motion Parameters ◽

Peak Ground Motion ◽

Motion Parameters

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SEISIMPACT-THES: A SCENARIO EARTHQUAKE AFFECTING THE BUILT ENVIRONMENT OF THE PREFECTURE OF THESSALONIKI

Bulletin of the Geological Society of Greece ◽

10.12681/bgsg.16529 ◽

2004 ◽

Vol 36 (3) ◽

pp. 1412 ◽

Cited By ~ 1

Author(s):

A. Kiratzi ◽

Z. Roumelioti ◽

Ch. Benetatos ◽

N. Theodulidis ◽

A. Savvaidis ◽

...

Keyword(s):

Ground Motion ◽

Strong Ground Motion ◽

Stochastic Method ◽

Urban Region ◽

Future Scenario ◽

Ground Motion Parameters ◽

Scenario Earthquake ◽

Scenario Earthquakes ◽

Motion Parameters ◽

Strong Ground

In the framework of the "SEISIMPACT-THES" project (Koutoupes et al., 2004; Savvaidis et al., 2004) a GIS database has been designed to include information on a wide range of components related to seismic risk within the broader area of the prefecture of Thessaloniki. One of these components refers to the distribution of strong ground motion produced by large earthquakes and the ability of a potential future user of the database to retrieve information regarding the distribution of strong ground motion from past destructive earthquakes in the area of Thessaloniki, as well as relative information for realistic future scenario earthquakes in the same area. The selection of future scenario earthquakes that may affect this urban region of interest is based on a combined review of historical data, previous probabilistic and deterministic hazard assessments, seismotectonic and microseismicity studies, relocated seismicity in northern Greece and the experience gained from worldwide research. In this study we present the results from hypothetical rupture of one fault that is located at the suburbs of the city, the Asvestochori fault. Empirical relations applicable to Greece (Papazachos & Papazachou 2003), as well as seismicity information are combined to determine the dimensions of the scenario earthquake source. Strong ground motion for the selected scenario is simulated using the stochastic method for finite faults (Beresnev and Atkinson, 1997). Uncertainties due to unknown parameters such as the rupture initiation point and the distribution of slip on the fault plane are taken into account by examining a large number of random scenarios. The average values from these multiple scenarios are then used to compile maps of strong ground motion parameters (e.g. peak ground acceleration and spectral acceleration). Although the examined scenario earthquake is moderate in size (Mw 5.2), the level of the resulting strong ground motion parameters is indicative of the potential destructiveness of the examined source. Due to the simplicity in the underlying assumptions of the stochastic method, the results of this study are a first-order approximation to the problem of defining expected shaking in the wider area of Thessaloniki. Other strong motion simulation methods of more deterministic character will also be applied for the same purpose in the framework of the SEISIMPACT-THES project.

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