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Article Dans Une Revue Geophysical Journal International Année : 2018

Passive seismic imaging with directive ambient noise: application to surface waves and the San Andreas Fault in Parkfield, CA

Résumé

This study deals with surface waves extracted from microseismic noise in the (0.1-0.2 Hz) frequency band with passive seismic-correlation techniques. For directive noise, we explore the concept of passive seismic-noise tomography performed on three-component sensors from a dense seismic network. From the nine-component correlation tensor, a rotation algorithm is introduced that forces each station pair to realign in the noise direction, a necessary condition to extract unbiased traveltime from passive seismic processing. After rotation is performed, the new correlation tensor exhibits a surface wave tensor from which Rayleigh and Love waves can be separately extracted for tomography inversion. Methodological aspects are presented and illustrated with group-speed maps for Rayleigh and Love waves and ellipticity measurements made on the San Andreas Fault in the Parkfield area, California, USA.
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Dates et versions

hal-04028152 , version 1 (14-03-2023)

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Philippe Roux. Passive seismic imaging with directive ambient noise: application to surface waves and the San Andreas Fault in Parkfield, CA. Geophysical Journal International, 2018, 179 (1), pp.367 - 373. ⟨10.1111/j.1365-246x.2009.04282.x⟩. ⟨hal-04028152⟩
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