Polarization Tomography for P-Wave Velocity Structure in Southern California

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Year of Publication: 
1994
Editor: 
Journal Title: 
Journal of Geophysical Research-Solid Earth
Journal Date: 
Aug 10
Place Published: 
Tertiary Title: 
Volume: 
99
Issue: 
B8
Pages: 
15245-15256
Section / Start page: 
Publisher: 
ISBN Number: 
0148-0227
ISSN Number: 
Edition: 
Short Title: 
Accession Number: 
ISI:A1994PB52000010
LDEO Publication Number: 
Call Number: 
Abstract: 

We develop a tomographic inversion method that uses teleseismic P wave polarization data to obtain velocity structure. Polarization inversion has some intrinsic advantages over travel Lime inversion: It is not influenced by source location and origin time errors; it is not sensitive to deep mantle velocity structure and can be used iteratively to improve the tomographic result. Polarization inversion is more sensitive to near-station velocity structure and to velocity gradient and is complementary to travel time inversion in this sense. The method is applied to California Institute of Technology-U.S. Geological Servey southern California array data. The result is generally consistent with previous work and also reveals that the high-velocity feature beneath the Transverse Ranges is bounded between 40 and 200 km depths and possibly has a second small piece at about 300 km depth. The slow velocity anomaly under the Salton Trough is limited to shallow depths, less than about 60 km.

Notes: 

Pb520Times Cited:22Cited References Count:33

DOI: