A hybrid method for calculating near-source, broadband seismograms: application to strong motion prediction

被引：80

作者：

Mai, PM ^{[1
]}

Beroza, GC ^{[1
]}

机构：

[1] Stanford Univ, Dept Geophys, Stanford, CA 94305 USA

来源：

PHYSICS OF THE EARTH AND PLANETARY INTERIORS | 2003年 / 137卷 / 1-4期

基金：

美国国家科学基金会;

关键词：

composite broadband seismograms; near-source ground motion; strong motion; prediction; scenario earthquakes;

D O I：

10.1016/S0031-9201(03)00014-1

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We present a hybrid method for computing broadband strong motion seismograms in the near-field of large earthquakes. We combine complete seismograms at low-frequency with ray-theory seismograms at high-frequency to form a composite broadband seismogram that spans the entire frequency range of interest. In our approach, the amplitude spectra of the two sets of synthetic seismograms are reconciled at intermediate frequencies where their domain of validity overlaps. We demonstrate the method with scenario earthquakes based on the spatial random-field model for complex earthquake slip [J. Geophys. Res. 107 (B11) (2002) 2308]. The hybrid near-source, broadband seismograms are useful both for detailed source modeling and for incorporating source effects into probabilistic seismic hazard analysis. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：183 / 199

页数：17

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