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A Ground-Motion Predictive Model for Iran and Turkey for Horizontal PGA, PGV, and 5% Damped Response Spectrum: Investigation of Possible Regional Effects
Date
2015-04-01
Author
Kale, Ozkan
Akkar, Dede Sinan
Ansari, Anooshiravan
Hamzehloo, Hossein
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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We present a ground-motion prediction equation (GMPE) for Turkey and Iran to investigate the possible regional effects on ground-motion amplitudes in shallow active crustal earthquakes. The proposed GMPE is developed from a subset of the recently compiled strong-motion database of the Earthquake Model of the Middle East Region project (see Data and Resources). A total of 670 Turkish and 528 Iranian accelerograms with depths down to 35 km are used to estimate peak ground acceleration, peak ground velocity, and 5% damped elastic pseudospectral acceleration ordinates of 0: 01 s <= T <= 4 s. The moment magnitude range of the model is 4 <= M-w <= 8, and the maximum Joyner-Boore distance is R-JB = 200 km. The functional form considers three major fault mechanisms (strike slip, normal, and reverse). The nonlinear soil behavior is a function of V-S30 (average shear-wave velocity in the upper 30 m of soil profile). Our observations from empirical and estimated ground-motion trends advocate regional differences in the territories covered by Iran and Turkey that originate from the differences in Q factors, kappa, and near-surface velocity profiles. These factors eventually affect the magnitude- and distance-dependent scaling of spectral amplitudes in Iran and Turkey. In essence, the ground-motion amplitudes of these two neighboring countries would draw patterns different than the ground-motion estimates of GMPEs developed from the strong-motion databases of shallow active crustal earthquakes from multiple countries.
Subject Keywords
Empirical attenuation relationship
,
Shallow crustal earthquakes
,
Seismic hazard analysis
,
East-Central Iran
,
Site-amplication
,
Zagros region
,
Nga project
,
Equations
,
Acceleration
,
Parameters
URI
https://hdl.handle.net/11511/62906
Journal
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
DOI
https://doi.org/10.1785/0120140134
Collections
Graduate School of Natural and Applied Sciences, Article
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O. Kale, D. S. Akkar, A. Ansari, and H. Hamzehloo, “A Ground-Motion Predictive Model for Iran and Turkey for Horizontal PGA, PGV, and 5% Damped Response Spectrum: Investigation of Possible Regional Effects,”
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
, pp. 963–980, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62906.