On the detection and identification of converted and reflected phases from receiver functions

Details On the detection and identification of converted and reflected phases from receiver functions On the detection and identification of converted and reflected phases from receiver functions

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000geoji.141..801c&link_type=abstract

Geophysical Journal International, Volume 141, Issue 3, pp. 801-808.

Astronomy and Astrophysics

Astronomy

5

Crustal Structure, Inversion, Poisson'S Ratio, Seismic Phase Identification

Scientific paper

We develop a simple methodology to extract information related to crustal structure such as the mean VP /VS 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.

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