Toward broadband simulation for predicting ground motion
Abstract
From the recent developments of seismology and earthquake engineering, one of the most important issues is how to predict strong ground motion for future large earthquakes based on past experiences and observations. Following the numerical recipe (Irikura, 2010), we simulate the synthetic motion by constructing characterized source models. In this study, we try to apply three different approaches to reach broadband waveform prediction. The first approach is the hybrid method (Kamae, 1998) based on stochastic method to simulate high-frequency (>1Hz) ground motion proposed by Boore (1983). The low frequency (<1Hz) ground motion is calculated based upon spectral element method (SEM). In the second approach, we try to simulate the high frequency ground motion by considering spectral element method only. In this approach, we try to raise the simulated frequency up to 3Hz. The third approach considers the low frequency waveforms calculated by SEM. Through the spectrum ratio determined between synthetic and observations, we correct the SEM synthetics to obtain high frequency signals. Our results demonstrate the effectiveness of these three approaches to the ground motion prediction of the 2010 Jiashian earthquake (M6.4) in Taiwan.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2011
- Bibcode:
- 2011AGUFM.S21A2171C
- Keywords:
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- 7212 SEISMOLOGY / Earthquake ground motions and engineering seismology