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Attenuation of coda waves in southern Tibet
Author(s) -
Reese C. C.,
Ni J. F.
Publication year - 1996
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 - 10.1029/96gl02888
Subject(s) - coda , geology , attenuation , seismology , crust , continental crust , plateau (mathematics) , geophysics , physics , optics , mathematical analysis , mathematics
The alternation characteristics of the crust in the southernmost Tibetan plateau are determined from analysis of S‐wave coda recorded at a temporary broadband station deployed during the 1994 INDEPTH‐II experiment. A method for determining Qc is developed which utilizes the coda spectrogram observed at a single station. The average S‐wave coda quality factor for this continent‐continent collision zone is Qc (f) = (160 ± 69) ( f / f 0 ) 1.11±0.19 , 1 < ( f / f 0 ) < 4, where f 0 = 1Hz. The results are consistent with other measurements of Qc ( f ) in continental collisional environments which typically exhibit low values of Qc ( f ) at 1 Hz and a strong dependence on frequency. In particular, the attenuation characteristics obtained for the Arabian‐Eurasian continental collisional boundary in western Turkey are quite similar to the results reported here for the southern Tibetan plateau.