地震学报(英文版)
地震學報(英文版)
지진학보(영문판)
ACTA SEISMOLOGICA SINICA
2004年
1期
20-30
,共11页
杨智娴%于湘伟%郑月军%陈运泰%倪晓晞%Winston CHAN
楊智嫻%于湘偉%鄭月軍%陳運泰%倪曉晞%Winston CHAN
양지한%우상위%정월군%진운태%예효희%Winston CHAN
simultaneous inversion%3-D P-wave velocity structure%earthquake relocation%central-western China
A simultaneous inversion of earthquake relocation and three-dimensional crustal structure of P-wave velocity in central-western China (21°N～36°N, 98°E～112°E) were performed in this paper. The crustal P-wave velocity model and earthquake relocation for this region are obtained using Pg and Sg phase readings of 9 988 earthquakes from 1992 to 1999 recorded at 193 seismic stations within central-western China by SPHYPIT90 and SPHREL3D90 programs. A lateral inhomogeneous structure of P-wave velocity in this region was obtained. Obvious contrast of P-wave velocities was revealed on both sides of active fault zones. Relocated epicenters of6 459 events show clear lineation along active faults, which indicated a close correlation between seismicity and the active faults in this region. Focal depths of 82% relocated events ranged from 0 to 20 km, which is in good agreement with that from double-difference earthquake location algorithm.
