[1]ZHOU Xixi,CHEN Qiang,ZHANG Yijun,et al.Velocity Structure Tomography in Southern California Area Based on Local Earthquakes P-wave Travel-time[J].Journal of Seismological Research,2020,43(04):674-679.
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Velocity Structure Tomography in Southern California Area Based on Local Earthquakes P-wave Travel-time
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
43
Number of periods:
2020 04
Page number:
674-679
Column:
Public date:
2020-09-17
- Title:
- Velocity Structure Tomography in Southern California Area Based on Local Earthquakes P-wave Travel-time
- Keywords:
- Southern California; P-wave travel-times; three-dimensional crustal velocity structure; seismic tomography
- CLC:
- P315.2
- DOI:
- -
- Abstract:
- In this study,basing on 505 local-seismic events recorded by densely distributed broadband seismic stations in Southern California between Jan.,2015 and Dec.,2018,we pick up 35 600 first-arrival travel-time of P-waves by adopted the AIC method.Then using the FMTOMO software,we obtained a three-dimensional P-wave crust velocity structure with a depth range of 0～40 km in this area through travel-time tomography,and the resolution of the velocity structure can reach 0.5°×0.5°×5 km.The velocity structure at different depth revealed that the P-wave velocity in Southern California changed with the depth,and the crust in this region had obvious lateral heterogeneity.The inversion results show that the velocity structure above the mid-crust is closely related to the rock formations and fault systems,and that below the lower crust has a large area of low-speed,showing lateral heterogeneity.
- References:
- -
- Similar References:
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Last Update:
2020-09-17