Coherency analysis of accelerograms recorded by the UPSAR array during the 2004 Parkfield earthquake

Katerina Konakli; Armen Der Kiureghian; Douglas Dreger

doi:10.1002/eqe.2362

Coherency analysis of accelerograms recorded by the UPSAR array during the 2004 Parkfield earthquake

Katerina Konakli, Armen Der Kiureghian, Douglas Dreger

University of California at Berkeley

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Spatial variability of near-fault strong motions recorded by the US Geological Survey Parkfield Seismograph Array (UPSAR) during the 2004 Parkfield (California) earthquake is investigated. Behavior of the lagged coherency for two horizontal and the vertical components is analyzed by separately examining the decay of coherency with frequency and distance. Assumptions, approximations, and challenges that are involved in estimation of the coherency from recorded data are presented in detail. Comparison of the UPSAR coherency estimates with coherency models that are commonly used in engineering practice sheds light on the advantages and limitations of different approaches to modeling the coherency, as well as on similarities and differences in the spatial variability exhibited by seismic ground motion arrays at different sites. © 2013 John Wiley & Sons, Ltd.

Original language	English
Journal	Earthquake Engineering and Structural Dynamics
Volume	43
Issue number	5
Pages (from-to)	641-659
Number of pages	19
ISSN	0098-8847
DOIs	https://doi.org/10.1002/eqe.2362
Publication status	Published - 2014

Keywords

Coherency estimation
Ground motion array
Lagged coherency
Spatial variability

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title = "Coherency analysis of accelerograms recorded by the UPSAR array during the 2004 Parkfield earthquake",

abstract = "Spatial variability of near-fault strong motions recorded by the US Geological Survey Parkfield Seismograph Array (UPSAR) during the 2004 Parkfield (California) earthquake is investigated. Behavior of the lagged coherency for two horizontal and the vertical components is analyzed by separately examining the decay of coherency with frequency and distance. Assumptions, approximations, and challenges that are involved in estimation of the coherency from recorded data are presented in detail. Comparison of the UPSAR coherency estimates with coherency models that are commonly used in engineering practice sheds light on the advantages and limitations of different approaches to modeling the coherency, as well as on similarities and differences in the spatial variability exhibited by seismic ground motion arrays at different sites. {\textcopyright} 2013 John Wiley & Sons, Ltd.",

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doi = "10.1002/eqe.2362",

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AU - Konakli, Katerina

AU - Kiureghian, Armen Der

AU - Dreger, Douglas

PY - 2014

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N2 - Spatial variability of near-fault strong motions recorded by the US Geological Survey Parkfield Seismograph Array (UPSAR) during the 2004 Parkfield (California) earthquake is investigated. Behavior of the lagged coherency for two horizontal and the vertical components is analyzed by separately examining the decay of coherency with frequency and distance. Assumptions, approximations, and challenges that are involved in estimation of the coherency from recorded data are presented in detail. Comparison of the UPSAR coherency estimates with coherency models that are commonly used in engineering practice sheds light on the advantages and limitations of different approaches to modeling the coherency, as well as on similarities and differences in the spatial variability exhibited by seismic ground motion arrays at different sites. © 2013 John Wiley & Sons, Ltd.

AB - Spatial variability of near-fault strong motions recorded by the US Geological Survey Parkfield Seismograph Array (UPSAR) during the 2004 Parkfield (California) earthquake is investigated. Behavior of the lagged coherency for two horizontal and the vertical components is analyzed by separately examining the decay of coherency with frequency and distance. Assumptions, approximations, and challenges that are involved in estimation of the coherency from recorded data are presented in detail. Comparison of the UPSAR coherency estimates with coherency models that are commonly used in engineering practice sheds light on the advantages and limitations of different approaches to modeling the coherency, as well as on similarities and differences in the spatial variability exhibited by seismic ground motion arrays at different sites. © 2013 John Wiley & Sons, Ltd.

KW - Coherency estimation

KW - Ground motion array

KW - Lagged coherency

KW - Spatial variability

U2 - 10.1002/eqe.2362

DO - 10.1002/eqe.2362

M3 - Journal article

SN - 0098-8847

VL - 43

SP - 641

EP - 659

JO - Earthquake Engineering and Structural Dynamics

JF - Earthquake Engineering and Structural Dynamics

IS - 5

ER -

Coherency analysis of accelerograms recorded by the UPSAR array during the 2004 Parkfield earthquake

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