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Microseismic Identification and Activity Analysis of the Wulong MS5.0 Earthquake Sequence in Chongqing
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Kai CHEN1, 2, Jiang YI1, Yingjie ZHANG3, Cuiping LI1, Bo GENG1
Journal of Geodesy and Geodynamics | 2025, 45(6) : 574 - 579
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Journal of Geodesy and Geodynamics | 2025, 45(6): 574-579
Microseismic Identification and Activity Analysis of the Wulong MS5.0 Earthquake Sequence in Chongqing
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Kai CHEN1, 2, Jiang YI1, Yingjie ZHANG3, Cuiping LI1, Bo GENG1
Affiliations
  • 1 Chongqing Earthquake Agency, 339 Honghuang Road, Chongqing 401147, China
  • 2 Institute of Geophysics, CEA, 5 South-Minzudaxue Road, Beijing 100081, China
  • 3 Hebei Earthquake Agency, 262 Huaizhong Road, Shijiazhuang 050022, China

    • CHEN Kai, senior engineer, PhD candidate, majors in seismic activity, E-mail:

About Author:

CHEN Kai, senior engineer, PhD candidate, majors in seismic activity, E-mail:

Published: 2025-06-15 doi: 10.14075/j.jgg.2024.07.320
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Using continuous seismic waveforms from the Chongqing seismic network for one week following the Wulong MS5.0 earthquake(November 23 to November 30, 2017), we employed the seismic detection and location program PALM to conduct microseismic detection and precise relocation of this earthquake sequence. The detection resulted in 1 558 seismic events, which is 4.2 times the number of events in the Chongqing seismic network catalog. After relocation, the minimum magnitude of completeness(MC) of the microseismic catalog decreased to ML0.1, significantly enhancing the completeness of the earthquake catalog. This indicates that PALM has high efficiency and accuracy in microseismic detection. The detected microseismic sequence clustered in an area approximately 5 km from the Wenfu fault, with depths concentrated between 5 km and 10 km, located at the bottom of the Wulong triangular tectonic zone. Based on the spatial distribution of the aftershocks, it is inferred that the causative structure of the earthquake might be a concealed fault at the base of the Wenfu fault.

PALM  /  template matching  /  microseismic detection  /  Wulong earthquake
陈凯, 易江, 张英杰, 李翠平, 耿波. 重庆武隆5.0级地震序列微震识别及活动性分析. 大地测量与地球动力学, 2025 , 45 (6) : 574 -579 . DOI: 10.14075/j.jgg.2024.07.320
Kai CHEN, Jiang YI, Yingjie ZHANG, Cuiping LI, Bo GENG. Microseismic Identification and Activity Analysis of the Wulong MS5.0 Earthquake Sequence in Chongqing[J]. Journal of Geodesy and Geodynamics, 2025 , 45 (6) : 574 -579 . DOI: 10.14075/j.jgg.2024.07.320
Funding
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  • Combination Project with Monitoring, Prediction and Scientific Research of Earthquake Technology, CEA(3JH-202401084)
  • Project of Chongqing Earthquake Agency
Appendix
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Year 2025 volume 45 Issue 6
21
8
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Article Info
doi: 10.14075/j.jgg.2024.07.320
  • Receive Date：2024-07-06
  • Online Date：2026-10-30
  • Published：2025-06-15
Article Data
Affiliations
History
  • Received：2024-07-06
Funding
Combination Project with Monitoring, Prediction and Scientific Research of Earthquake Technology, CEA(3JH-202401084)
Project of Chongqing Earthquake Agency
Affiliations
    1 Chongqing Earthquake Agency, 339 Honghuang Road, Chongqing 401147, China
    2 Institute of Geophysics, CEA, 5 South-Minzudaxue Road, Beijing 100081, China
    3 Hebei Earthquake Agency, 262 Huaizhong Road, Shijiazhuang 050022, China
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https://castjournals.cast.org.cn/joweb/ddcl/EN/10.14075/j.jgg.2024.07.320
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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