Joint Inversion of Body-Wave Arrival Times and Surface-Wave Dispersion for Three-Dimensional Seismic Structure Around SAFOD

Haijiang Zhang; Monica Maceira; Philippe Roux; Clifford Thurber

doi:10.1007/s00024-014-0806-y

Joint Inversion of Body-Wave Arrival Times and Surface-Wave Dispersion for Three-Dimensional Seismic Structure Around SAFOD

Haijiang Zhang, Monica Maceira, Philippe Roux, Clifford Thurber

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

We incorporate body-wave arrival time and surface-wave dispersion data into a joint inversion for three-dimensional P-wave and S-wave velocity structure of the crust surrounding the site of the San Andreas Fault Observatory at Depth. The contributions of the two data types to the inversion are controlled by the relative weighting of the respective equations. We find that the trade-off between fitting the two data types, controlled by the weighting, defines a clear optimal solution. Varying the weighting away from the optimal point leads to sharp increases in misfit for one data type with only modest reduction in misfit for the other data type. All the acceptable solutions yield structures with similar primary features, but the smaller-scale features change substantially. When there is a lower relative weight on the surface-wave data, it appears that the solution over-fits the body-wave data, leading to a relatively rough V_s model, whereas for the optimal weighting, we obtain a relatively smooth model that is able to fit both the body-wave and surface-wave observations adequately.

Original language	English
Pages (from-to)	3013-3022
Number of pages	10
Journal	Pure and Applied Geophysics
Volume	171
Issue number	11
DOIs	https://doi.org/10.1007/s00024-014-0806-y
State	Published - Nov 6 2014
Externally published	Yes

Funding

We thank Yehuda Ben-Zion and Antonio Rovelli for organizing the 40th Workshop of the International School of Geophysics on ‘‘Properties and Processes of Crustal Fault Zones’’ in Erice, Sicily, which motivated the present work. We are grateful to two anonymous reviewers for their constructive comments, which we hope have led to substantial improvement of the manuscript. This research presented here was partly supported by the Chinese government’s executive program for exploring the deep interior beneath the Chinese continent (SinoP-robe-02), Natural Science Foundation of China under Grant No. 41274055, and Fundamental Research Funds for the Central Universities (WK2080000053). This research was also supported by DE-NA0001523 from the US Department of Energy.

Funders	Funder number
National Science Foundation	1348121
U.S. Department of Energy
National Natural Science Foundation of China	41274055
Fundamental Research Funds for the Central Universities	DE-NA0001523, WK2080000053

Access to Document

10.1007/s00024-014-0806-y

Cite this

@article{c007a1e1682a44b0b88721e0fd617720,

title = "Joint Inversion of Body-Wave Arrival Times and Surface-Wave Dispersion for Three-Dimensional Seismic Structure Around SAFOD",

abstract = "We incorporate body-wave arrival time and surface-wave dispersion data into a joint inversion for three-dimensional P-wave and S-wave velocity structure of the crust surrounding the site of the San Andreas Fault Observatory at Depth. The contributions of the two data types to the inversion are controlled by the relative weighting of the respective equations. We find that the trade-off between fitting the two data types, controlled by the weighting, defines a clear optimal solution. Varying the weighting away from the optimal point leads to sharp increases in misfit for one data type with only modest reduction in misfit for the other data type. All the acceptable solutions yield structures with similar primary features, but the smaller-scale features change substantially. When there is a lower relative weight on the surface-wave data, it appears that the solution over-fits the body-wave data, leading to a relatively rough Vs model, whereas for the optimal weighting, we obtain a relatively smooth model that is able to fit both the body-wave and surface-wave observations adequately.",

author = "Haijiang Zhang and Monica Maceira and Philippe Roux and Clifford Thurber",

note = "Publisher Copyright: {\textcopyright} 2014, Springer Basel.",

year = "2014",

month = nov,

day = "6",

doi = "10.1007/s00024-014-0806-y",

language = "English",

volume = "171",

pages = "3013--3022",

journal = "Pure and Applied Geophysics",

issn = "0033-4553",

publisher = "Springer",

number = "11",

}

TY - JOUR

T1 - Joint Inversion of Body-Wave Arrival Times and Surface-Wave Dispersion for Three-Dimensional Seismic Structure Around SAFOD

AU - Zhang, Haijiang

AU - Maceira, Monica

AU - Roux, Philippe

AU - Thurber, Clifford

PY - 2014/11/6

Y1 - 2014/11/6

N2 - We incorporate body-wave arrival time and surface-wave dispersion data into a joint inversion for three-dimensional P-wave and S-wave velocity structure of the crust surrounding the site of the San Andreas Fault Observatory at Depth. The contributions of the two data types to the inversion are controlled by the relative weighting of the respective equations. We find that the trade-off between fitting the two data types, controlled by the weighting, defines a clear optimal solution. Varying the weighting away from the optimal point leads to sharp increases in misfit for one data type with only modest reduction in misfit for the other data type. All the acceptable solutions yield structures with similar primary features, but the smaller-scale features change substantially. When there is a lower relative weight on the surface-wave data, it appears that the solution over-fits the body-wave data, leading to a relatively rough Vs model, whereas for the optimal weighting, we obtain a relatively smooth model that is able to fit both the body-wave and surface-wave observations adequately.

AB - We incorporate body-wave arrival time and surface-wave dispersion data into a joint inversion for three-dimensional P-wave and S-wave velocity structure of the crust surrounding the site of the San Andreas Fault Observatory at Depth. The contributions of the two data types to the inversion are controlled by the relative weighting of the respective equations. We find that the trade-off between fitting the two data types, controlled by the weighting, defines a clear optimal solution. Varying the weighting away from the optimal point leads to sharp increases in misfit for one data type with only modest reduction in misfit for the other data type. All the acceptable solutions yield structures with similar primary features, but the smaller-scale features change substantially. When there is a lower relative weight on the surface-wave data, it appears that the solution over-fits the body-wave data, leading to a relatively rough Vs model, whereas for the optimal weighting, we obtain a relatively smooth model that is able to fit both the body-wave and surface-wave observations adequately.

UR - http://www.scopus.com/inward/record.url?scp=84911444202&partnerID=8YFLogxK

U2 - 10.1007/s00024-014-0806-y

DO - 10.1007/s00024-014-0806-y

M3 - Article

AN - SCOPUS:84911444202

SN - 0033-4553

VL - 171

SP - 3013

EP - 3022

JO - Pure and Applied Geophysics

JF - Pure and Applied Geophysics

IS - 11

ER -

Joint Inversion of Body-Wave Arrival Times and Surface-Wave Dispersion for Three-Dimensional Seismic Structure Around SAFOD

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this