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Identification of multiple reflected phases from migration receiver function profile: An example for the INDEPTH‐III passive teleseismic P waveform data
Author(s) -
Tian Xiaobo,
Wu Qingju,
Zhang Zhongjie,
Teng Jiwen,
Zeng Rongsheng
Publication year - 2005
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2004gl021885
Subject(s) - classification of discontinuities , receiver function , waveform , discontinuity (linguistics) , geology , amplitude , seismology , multiple , geodesy , mantle (geology) , phase (matter) , function (biology) , remote sensing , geophysics , computer science , physics , mathematical analysis , optics , telecommunications , mathematics , quantum mechanics , evolutionary biology , radar , arithmetic , biology , lithosphere , tectonics
The crustal multiple reflected phases usually interfere with those converted phases from the topmost mantle discontinuities, which make them difficult to be identified and should be carefully interpreted in a migration receiver functions profile. We propose a simple scheme to identify the crustal multiples in a migration receiver functions profile. The scheme is based on the differences in both geometric and dynamic features resolved using AVP (amplitude variation verse ray parameter) and DVP (discontinuity depth variation verse ray parameter). Synthetic data shows that the crustal multiples can be distinguished from those converted phases in the receiver function migration profile, especially when the receiver functions are migrated using velocities lower than the actual velocities. As an example, we apply our procedure to the INDEPTH‐III passive teleseismic P waveform data. Our results indicate that a possible converted phase from the “220‐km” discontinuity is a crustal multiple reflected phase.