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IUGG XXIV General Assembly July 2-13, 2007 Perugia, Italy
(S) - IASPEI - International Association of Seismology and Physics of the Earth's
Interior
JSS015 Oral Presentation 2328
3-D crustal velocity tomography in south of Jiangsu Province and adjacent
area, China
Prof. Qinghe Li
Earthquake Administration of Jiangsu province China Earthquake Administration IASPEI
Zhang Yuiansheng, Jin Shumei
The Method MUltiphase Traveltime Inversion(MUTI) has been improved and optimized. We get 3-D
velocity tomography in south of Jiangsu province and adjacent area( 29-34N, 117.5-122.5E), China, by
using seismic data after relocation by DD and GA jointly. The crust can divided into upper, middle and
lower part. The buried depth of upper crust is 10-12km with velocity 6.24km/s, the buried depth of
middle crust is 22-23km with 6.77km/s. The depth of Moho is 28.2-38.1km, appear shallower in
northeast and deeper in southwest. Stronger heterogeneity in various layer has been found. According
to analyzing focus and deep structure, we can estimate the deep geometry of Maoshan Fault on which
occurred M6 earthquake in 1979, and the deep geometry of Taicang-Fengxian Fault on which occurred
M5.1 earthquake in 1990. we also can analyze the features of deep structure.
Keywords: 3 d velocity tomography, features of deep structure