Typhoon-induced P-wave microseisms can be observed using seismological arrays and analyzed for the seismic monitoring of ocean storms. This paper presents a frequency-domain beamforming (FB) method that integrates a three-dimensional (3-D) Earth model to better capture the heterogeneities in the subsurface structure, and therefore yield more accurate ray-tracing and travel-time predictions. This method is applied to the Super Typhoon Lupit (2009) using seismological array observations from the Northeast China Extended Seismic Array (NECESSArray) and high-sensitivity seismograph network in Japan (Hi-net). The results show that the localized P-wave microseism source regions based on the 3-D model are in better agreement with the theoretical source regions and typhoon centers than those based on a conventional one-dimensional (1-D) model. The significance of using a 3-D model instead of a 1-D model in the FB method is further investigated by comparing the consistency of the localization results for the two different arrays, with the localized source regions being more mutually concordant when using the 3-D model. The results demonstrate that integrating the 3-D model into the FB method improves the accuracy of locating the typhoon-induced P-wave microseism source regions.
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August 2020
August 03 2020
Improving seismic remote sensing of typhoon with a three-dimensional Earth model
Sunke Fang;
Sunke Fang
1
Marine Acoustics and Remote Sensing Laboratory, Zhejiang Ocean University
, Zhoushan, Zhejiang Province, 316021, People's Republic of China
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Jianmin Lin
;
Jianmin Lin
a)
2
Key Laboratory of Ocean Observation-Imaging Testbed of Zhejiang Province, Zhejiang University
, Zhoushan, Zhejiang Province, 316021, People's Republic of China
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Sidao Ni;
Sidao Ni
3
State Key Laboratory of Geodesy and Earth's Dynamics, Institute of Geodesy and Geophysics, Chinese Academy of Sciences
, Wuhan, Hubei Province, 430077, People's Republic of China
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Xiaofeng Li;
Xiaofeng Li
4
Institute of Oceanography, Chinese Academy of Sciences
, Qingdao, Shandong Province, 266071, People's Republic of China
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Xiaoqing Xu;
Xiaoqing Xu
1
Marine Acoustics and Remote Sensing Laboratory, Zhejiang Ocean University
, Zhoushan, Zhejiang Province, 316021, People's Republic of China
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Hong Zheng;
Hong Zheng
1
Marine Acoustics and Remote Sensing Laboratory, Zhejiang Ocean University
, Zhoushan, Zhejiang Province, 316021, People's Republic of China
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Wen Xu
Wen Xu
2
Key Laboratory of Ocean Observation-Imaging Testbed of Zhejiang Province, Zhejiang University
, Zhoushan, Zhejiang Province, 316021, People's Republic of China
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a)
Also at: School of Ocean and Earth Science, Tongji University, Shanghai, 200092, People's Republic of China. Electronic mail: jmlin@zju.edu.cn, ORCID: 0000-0002-1986-367X.
J. Acoust. Soc. Am. 148, 478–491 (2020)
Article history
Received:
February 07 2020
Accepted:
July 06 2020
Citation
Sunke Fang, Jianmin Lin, Sidao Ni, Xiaofeng Li, Xiaoqing Xu, Hong Zheng, Wen Xu; Improving seismic remote sensing of typhoon with a three-dimensional Earth model. J. Acoust. Soc. Am. 1 August 2020; 148 (2): 478–491. https://doi.org/10.1121/10.0001624
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