Micro-Earthquake Seismicity and Tectonic Significance of the 2012 <i>M</i>s 4.9 Baoying Earthquake, Jiangsu, China

Yanzhen Li; Hongyi Li; Yafen Huang; Shengzhong Zhang; Yuejun Lü

doi:10.1007/s12583-022-1780-4

Volume 34 Issue 3

Jun 2023

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Journal of Earth Science > 2023 > 34(3): 900-910.

Yanzhen Li, Hongyi Li, Yafen Huang, Shengzhong Zhang, Yuejun Lü. Micro-Earthquake Seismicity and Tectonic Significance of the 2012 Ms 4.9 Baoying Earthquake, Jiangsu, China. Journal of Earth Science, 2023, 34(3): 900-910. doi: 10.1007/s12583-022-1780-4

Citation:

Yanzhen Li, Hongyi Li, Yafen Huang, Shengzhong Zhang, Yuejun Lü. Micro-Earthquake Seismicity and Tectonic Significance of the 2012 Ms 4.9 Baoying Earthquake, Jiangsu, China. Journal of Earth Science, 2023, 34(3): 900-910. doi: 10.1007/s12583-022-1780-4

Citation:

Yanzhen Li, Hongyi Li, Yafen Huang, Shengzhong Zhang, Yuejun Lü. Micro-Earthquake Seismicity and Tectonic Significance of the 2012 Ms 4.9 Baoying Earthquake, Jiangsu, China. Journal of Earth Science, 2023, 34(3): 900-910. doi: 10.1007/s12583-022-1780-4

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Micro-Earthquake Seismicity and Tectonic Significance of the 2012 Ms 4.9 Baoying Earthquake, Jiangsu, China

doi: 10.1007/s12583-022-1780-4

1.
School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China
2.
Information Network Center, China University of Geosciences, Beijing 100083, China
3.
National Institute of Natural Hazards, MEMC, Beijing 100085, China

More Information

Corresponding author: Hongyi Li, lih@cugb.edu.cn
Received Date: 06 Aug 2022
Accepted Date: 08 Nov 2022

Available Online: 08 Jun 2023

Issue Publish Date: 30 Jun 2023

Abstract

Abstract

On July 20, 2012, the Ms 4.9 Baoying Earthquake occurred near the junction of Baoying County and Gaoyou City in Jiangsu Province, eastern China. Due to no obvious surface rupture and limited observation of earthquake sequence, the seismogenic structure of the Ms 4.9 Baoying Earthquake is still unclear. In this study, 80 earthquakes provided by China Earthquake Network Center (CENC) are first relocated; and then the relocated 75 events with high signal-to-noise ratios as templates are utilized to scan through continuous waveform data (July 11 to August 31, 2012) using graphics processing unit-based match and locate (GPU-M&L) technique. Then the DeepDenoiser, a deep-learning-based noise reduction technique, is used to further confirm some newly detected events; and the double-difference relocation (HypoDD) algorithm is used to relocate the earthquakes. We detect and relocate more than twice as many events as the CENC routine catalog, which includes 15 foreshocks and 230 aftershocks. The results show that the foreshocks are mainly distributed in the NW direction along the extended SE section of the blind Xiagonghe fault (XF), which is orthogonal to the strike of the seismogenic fault of the Ms 4.9 Baoying Earthquake (Yangchacang-Sangshutou fault, named YSF). Most of the aftershocks are generally distributed along the NNE-trending YSF and illuminate a steeply dipping plane. This study reveals detailed spatiotemporal evolution of the earthquake sequence and suggests that the buried XF extends southeastward and cuts through the NNE-trending seismogenic YSF.
- 2012 Ms 4.9 Baoying Earthquake,
- micro-earthquake seismicity,
- tectonics,
- GPU-M&L,
- HypoDD,
- DeepDenoiser

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References(50)

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