Open AccessOn the detection and identification of converted and reflected phases from receiver functions
Author(s) -
Chevrot Sébastien,
Girardin Nicole
Publication year - 2000
Publication title -
geophysical journal international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0956-540X
DOI - 10.1046/j.1365-246x.2000.00139.x
Subject(s) - classification of discontinuities , singular value decomposition , receiver function , geology , waveform , inversion (geology) , identification (biology) , algorithm , inverse theory , seismology , geophysics , computer science , mathematics , mathematical analysis , telecommunications , botany , biology , lithosphere , tectonics , radar , oceanography , deformation (meteorology)
Summary We develop a simple methodology to extract information related to crustal structure such as the mean V P /V S ratio, the magnitude of lateral variations and the presence of discontinuities from a selection of receiver functions. We show that crustal phases can be detected and exploited on individual receiver functions. Two filtering techniques, based on singular value decomposition and spectral matrix filtering, are proposed to enhance the coherent phases in receiver functions. Additionally, the relative traveltimes and slownesses between the different phases are utilized for a more reliable phase identification. We apply these methods to data of station PRU (Czech Republic) and compare the results with a classical time‐domain waveform inversion. We find a good qualitative agreement between the simple crustal models inferred from the two approaches. Waveform modelling suggests that the identification of converted phases can still be ambiguous and other geophysical or geological constraints are needed.