Wavelet transform: A tool for the interpretation of upper mantle converted phases at high frequency

Abstract : P to S converted receiver functions recorded at VBB FDSN California stations are studied in the frequency range of 0.1 to i Hz. Microseismic noise is maximum in this frequency range, but signal processing by the wavelet transform enables us: (1) to enhance seismic phases associated with seismic velocity gradients and discontinuities at the base of the upper mantle, (2) to extract accurate arrival times, and (3) to obtain an accurate insight into the frequency content. In the case of California, one seismic discontinuity and two zones of high gradients in the depth range of 625 to 720km are recurrently observed for two different data sets.
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Geophysical Research Letters, American Geophysical Union, 2001, 28 (22), pp.4327-4330. 〈10.1029/2001GL013214〉
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https://hal.archives-ouvertes.fr/hal-01767215
Contributeur : Ginette Saracco <>
Soumis le : lundi 16 avril 2018 - 06:52:50
Dernière modification le : mardi 17 avril 2018 - 01:22:21

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2001GL013214.pdf
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Julie Castillo, Antoine Mocquet, Ginette Saracco. Wavelet transform: A tool for the interpretation of upper mantle converted phases at high frequency. Geophysical Research Letters, American Geophysical Union, 2001, 28 (22), pp.4327-4330. 〈10.1029/2001GL013214〉. 〈hal-01767215〉

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