A Wavelet-Domain Seismic Source Inversion Method for Submarine Earthquakes Based on 3-D Green’s Functions

Wei Liu1; Yunyi Qian2; Xueting Wei1; Weibin Song1; Xiaofei Chen3

2024

10.1109/TGRS.2024.3434389

IEEE Transactions on Geoscience and Remote Sensing   影响因子和分区

1558-0644

Determining source parameters of submarine earthquakes is fundamental to geotechnical and geodynamic research. However, these remote areas are usually poorly monitored, posing challenges in characterizing seismic behaviors. Here, we propose a wavelet-domain seismic source inversion method based on 3-D Green’s functions for modeling teleseismic body waves to obtain locations and focal mechanisms of submarine earthquakes. We adopt the heat bath algorithm to implement inversions. The wavelet transform allows us to simultaneously investigate source features in different frequencies. Numerical experiments conducted on synthetic data show our method is efficient and suggest that, for ~M6 earthquakes, lower-frequency waveforms (<0.1 Hz) are more sensitive to focal mechanisms, while higher frequencies (0.1~0.2 Hz) work better in constraining source locations. Application to a ~M6 earthquake in the Japan Trench suggests that our approach can provide reliable source parameters (locations and focal mechanisms) for submarine earthquakes.

SCI ; EI

第一

GEOSCIENCES

1.Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China
2.School of Resources and Safety Engineering and the State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China
3.Department of Earth and Space Sciences and Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology, Southern University of Science and Technology, Shenzhen, China

Wei Liu,Yunyi Qian,Xueting Wei,等. A Wavelet-Domain Seismic Source Inversion Method for Submarine Earthquakes Based on 3-D Green’s Functions[J]. IEEE Transactions on Geoscience and Remote Sensing,2024,62.

Wei Liu,Yunyi Qian,Xueting Wei,Weibin Song,&Xiaofei Chen.(2024).A Wavelet-Domain Seismic Source Inversion Method for Submarine Earthquakes Based on 3-D Green’s Functions.IEEE Transactions on Geoscience and Remote Sensing,62.

Wei Liu,et al."A Wavelet-Domain Seismic Source Inversion Method for Submarine Earthquakes Based on 3-D Green’s Functions".IEEE Transactions on Geoscience and Remote Sensing 62(2024).