HR: 11:25h
AN: S52A-04 INVITED    [Abstracts]
TI: Ambient Noise Tomography in Western China and Northern India
AU: * Yang, Y
EM: yingjie.yang@colorado.edu
AF: Center of Imaging the Earth's Interior,University of Coloado at Boulder, 2000 colorado Ave., Boulder, CO 80309,
AU: Ritzwoller, M
EM: ritzwoll@anquetil.colorado.edu
AF: Center of Imaging the Earth's Interior,University of Coloado at Boulder, 2000 colorado Ave., Boulder, CO 80309,
AU: Song, X
EM: xsong@uiuc.edu
AF: Department of Geology,University of Illinois at Urbana-Champaign, 1301 W Green St, Urbana, IL 61801,
AU: Zheng, S
EM: shzheng@uiuc.edu
AF: Department of Geology,University of Illinois at Urbana-Champaign, 1301 W Green St, Urbana, IL 61801,
AU: Zheng, S
EM: shzheng@uiuc.edu
AF: Institute of Earthquake Science, China Earthquake Administration, Beijing, Beijing, 100036, China
AU: Rai, S
EM: raiss@rediffmail.com
AF: the National Geophysical Research Institute, Hyderabad, Hyderabad, 000000, India
AU: van der Hilst, R
EM: hilst@mit.edu
AF: Massachusetts Institute of Technology Earth, Atmospheric, and Planetary Sciences, 77 Massachusetts Avenue, Cambridge, MA 01239,
AB: Surface wave tomography has proven particularly useful in imaging Earth's crust and uppermost mantle on both regional and global scales. However, short-period surface wave dispersion measurements, which are most useful to constrain the structure of the crust and uppermost upper mantle, are extremely hard to obtain from seismic events due to scattering and attenuation. Ambient seismic noise is rich in short-period surface waves from which the empirical Green's functions of surface waves between pairs of stations can be extracted by cross-correlating long noise sequences. Tomography based on surface wave dispersion obtained from the empirical Green's functions has been shown to produce high-resolution, short-period (6-30 s) surface wave dispersion maps across numerous regions of the Earth in both regional and continental scales. This study applies the ambient noise tomography method to the significant data resources that are now available and are continuing to emerge in India and W. China, which will yield dense path coverage in northern India and western China. These resources include data from the permanent Federation of Digital Seismographic Network (FDSN), temporary US PASSCAL installations in and around China, Chinese installations in Tibet, and temporary broad-band deployments in India. The resulting tomography maps provide new information to improve the understanding of regional tectonic processes.
DE: 7205 Continental crust (1219)
DE: 7255 Surface waves and free oscillations
DE: 7270 Tomography (6982, 8180)
SC: Seismology [S]
MN: 2007 Fall Meeting