Direct Image Dissimilarity Inversion of Ambient Noise Multimodal Dispersion Spectrograms

Liu, Qi1; Chen, Xiaofei2,3,4; Gao, Lina4; Yu, Zhenjiang4; Chen, Juqing1,4

2023-10-01

10.1785/0120230012

BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA   Impact Factor & Quartile

0037-1106

1943-3573

The frequency-Bessel transform (F-J) method, which can reliably provide multimodal surface-wave dispersion spectrograms from recorded ambient noise, has been applied in many studies of the earth's velocity structure. However, extracting dispersion curves and determining their roots can be challenging. To circumvent these challenges, we present a new, objective spectrum inversion scheme for multimodal dispersion spectrograms. In our new method, the image dissimilarity between the observed dispersion spectrogram and the synthetic kernel spectrum of Green's function is directly minimized to invert the subsurface velocity structure by a quasi-Newton method. During the spectrum inversion, Green's kernel spectrum and its derivatives are efficiently calculated by the generalized reflection and transmission coefficient method. Thus, we can rapidly perform structure inversion for multimodal dispersion spectrograms. Finally, the reliability and practicality of the new method are validated by synthetic and field applications, respectively.

SCI

English

Corresponding

National Natural Science Foundation of China["U1901602","92155307"] ; Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology[2022B1212010 002] ; Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology[ZDSYS20190902093007855] ; Shenzhen Science and Technology Program[KQTD20170810111725321]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:001085830200001

SEISMOLOGICAL SOC AMER

GEOSCIENCES

Web of Science

1.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Prov Key Lab Geophys High Resolut Imagin, Shenzhen, Peoples R China
3.Southern Univ Sci & Technol, Shenzhen Key Lab Deep Offshore Oil & Gas Explorat, Shenzhen, Peoples R China
4.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen, Peoples R China

Liu, Qi,Chen, Xiaofei,Gao, Lina,et al. Direct Image Dissimilarity Inversion of Ambient Noise Multimodal Dispersion Spectrograms[J]. BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA,2023,113(5).

Liu, Qi,Chen, Xiaofei,Gao, Lina,Yu, Zhenjiang,&Chen, Juqing.(2023).Direct Image Dissimilarity Inversion of Ambient Noise Multimodal Dispersion Spectrograms.BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA,113(5).

Liu, Qi,et al."Direct Image Dissimilarity Inversion of Ambient Noise Multimodal Dispersion Spectrograms".BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA 113.5(2023).