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

P. Martin Mai; G. C. Beroza

doi:10.1016/S0031-9201(03)00014-1

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

P. Martin Mai^*, G. C. Beroza

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

81 Scopus citations

Abstract

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.

Original language	English (US)
Pages (from-to)	183-199
Number of pages	17
Journal	Physics of the Earth and Planetary Interiors
Volume	137
Issue number	1-4
DOIs	https://doi.org/10.1016/S0031-9201(03)00014-1
State	Published - May 15 2003
Externally published	Yes

Keywords

Composite broadband seismograms
Near-source ground motion
Prediction
Scenario earthquakes
Strong motion

ASJC Scopus subject areas

Astronomy and Astrophysics
Geophysics
Physics and Astronomy (miscellaneous)
Space and Planetary Science

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10.1016/S0031-9201(03)00014-1

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title = "A hybrid method for calculating near-source, broadband seismograms: Application to strong motion prediction",

abstract = "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.",

keywords = "Composite broadband seismograms, Near-source ground motion, Prediction, Scenario earthquakes, Strong motion",

author = "Mai, {P. Martin} and Beroza, {G. C.}",

note = "Funding Information: Our sincere thanks go to Paul Spudich for putting together the ISOSYN and COPMPSYN packages to calculate finite-fault, near-source seismograms ( Spudich and Xu, 2002 ), and for providing helpful advice in running these programs. Reviews by K. Dan and an anonymous reviewer improved the manuscript. This research was supported by the US–Japan Cooperative Research in Urban Earthquake Disaster Mitigation Project (NSF 98-36), Grant Number CMS-9821096.",

year = "2003",

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doi = "10.1016/S0031-9201(03)00014-1",

language = "English (US)",

volume = "137",

pages = "183--199",

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T1 - A hybrid method for calculating near-source, broadband seismograms

T2 - Application to strong motion prediction

AU - Mai, P. Martin

AU - Beroza, G. C.

N1 - Funding Information: Our sincere thanks go to Paul Spudich for putting together the ISOSYN and COPMPSYN packages to calculate finite-fault, near-source seismograms ( Spudich and Xu, 2002 ), and for providing helpful advice in running these programs. Reviews by K. Dan and an anonymous reviewer improved the manuscript. This research was supported by the US–Japan Cooperative Research in Urban Earthquake Disaster Mitigation Project (NSF 98-36), Grant Number CMS-9821096.

PY - 2003/5/15

Y1 - 2003/5/15

N2 - 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.

AB - 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.

KW - Composite broadband seismograms

KW - Near-source ground motion

KW - Prediction

KW - Scenario earthquakes

KW - Strong motion

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SN - 0031-9201

VL - 137

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JO - Physics of the Earth and Planetary Interiors

JF - Physics of the Earth and Planetary Interiors

IS - 1-4

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

Abstract

Keywords

ASJC Scopus subject areas

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