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Effectiveness of Hybrid Green’s Function Method in the Simulation of Near-Field Strong Motion: An Application to the 2004 Parkfield Earthquake

¹ Department of Earthquake Engineering
Kandilli Observatory and Earthquake Research Institute
Boaziçi University
34684, Çengelköy, Istanbul, Turkey
banu.sanli{at}boun.edu.tr
durukal{at}boun.edu.tr
erdik{at}boun.edu.tr

^* Present address: Institute of Geophysics, ETH, Zurich, Switzerland.

This study discusses the effectiveness of the hybrid Green’s function method (HGF) in simulating near-field strong ground motions. The HGF method starts with calculating the synthetic Green’s function, which is a combination of deterministically calculated, low-frequency motion and stochastically simulated, high- frequency motion. Summation of Green’s functions using the numerical framework of the empirical Green’s function method gives the large earthquake synthetics. We simulated the M 6.0 2004 Parkfield earthquake producing near-fault ground motion that favorably compares with the empirical data. We carried out simulations for the frequency range 0.1–25 Hz at eight rock and four soil site stations. Frequency- dependent site-amplification values are calculated using empirical data and considered for the soil site simulations. The comparisons of simulated motion in time and frequency domain proved the efficiency of the HGF method in such broadband simulations.

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				R. A. Harris and J R. Arrowsmith Introduction to the Special Issue on the 2004 Parkfield Earthquake and the Parkfield Earthquake Prediction Experiment Bulletin of the Seismological Society of America, September 1, 2006; 96(4B): S1 - S10. [Abstract] [Full Text] [PDF]