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Research on Magnitude Estimation Model Using Pd Method in Beijing-Tianjin-Hebei Region
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Lichan WANG1, 2, Guoliang MAO1, 2, Yaojia GUO1, 2, Qingxi LIN3
Journal of Geodesy and Geodynamics | 2025, 45(3) : 260 - 265
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Journal of Geodesy and Geodynamics | 2025, 45(3): 260-265
Research on Magnitude Estimation Model Using Pd Method in Beijing-Tianjin-Hebei Region
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Lichan WANG1, 2, Guoliang MAO1, 2, Yaojia GUO1, 2, Qingxi LIN3
Affiliations
  • 1 Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards, 1540 West-Quanbei Street, Xingtai 054000, China
  • 2 Hebei Earthquake Agency, 262 Huaizhong Road, Shijiazhuang 050021, China
  • 3 Guangdong Earthquake Agency, 81 Mid-Xianlie Road, Guangzhou 510070, China

    • WANG Lichan, senior engineer, majors in earthquake monitoring and early warning, E-mail:

About Author:

WANG Lichan, senior engineer, majors in earthquake monitoring and early warning, E-mail:

Published: 2025-03-15 doi: 10.14075/j.jgg.2024.04.203
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Based on 963 records of intensity meters and 410 records of strong motion seismographs of 37 earthquakes of ML3.2 to 5.9 in Beijing-Tianjin-Hebei and its surrounding areas from 2019 to 2022, we use the Pd method to establish 36 magnitude estimation models between Pd amplitude within 2 to 7 seconds after P-wave arrival time of vertical waveform and magnitude. By fitting the standard deviation, the optimal filtering frequency bands of intensity meters and strong motion seismographs are determined to be 1 to 3 Hz and 0.5 to 3 Hz respectively. Meanwhile, we establish the magnitude estimation model of intensity meters and strong motion seismographs within 3 seconds after P-wave arrival time using Pd method. The parameter fitting results show that fitting slope and correlation coefficient are high, the standard deviation is small, and the overall reliability is high. The results of reverse and new data verification indicate that the magnitude deviation of Pd method is mainly within ±0.5, which shows that the two models established in this paper are reasonable and can be well applied in Beijing-Tianjin-Hebei region.

Beijing-Tianjin-Hebei region  /  earthquake early warning  /  Pd method  /  magnitude estimation model
王莉婵, 毛国良, 郭垚嘉, 林庆西. 京津冀地区Pd方法震级估算模型研究. 大地测量与地球动力学, 2025 , 45 (3) : 260 -265 . DOI: 10.14075/j.jgg.2024.04.203
Lichan WANG, Guoliang MAO, Yaojia GUO, Qingxi LIN. Research on Magnitude Estimation Model Using Pd Method in Beijing-Tianjin-Hebei Region[J]. Journal of Geodesy and Geodynamics, 2025 , 45 (3) : 260 -265 . DOI: 10.14075/j.jgg.2024.04.203
Funding
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  • The Spark Program of Earthquake Technology of Hebei Province(DZ202108100004)
  • The Spark Program of Earthquake Technology of CEA(XH23005A)
Appendix
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Year 2025 volume 45 Issue 3
29
11
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Article Info
doi: 10.14075/j.jgg.2024.04.203
  • Receive Date：2024-04-29
  • Online Date：2026-10-30
  • Published：2025-03-15
Article Data
Affiliations
History
  • Received：2024-04-29
Funding
The Spark Program of Earthquake Technology of Hebei Province(DZ202108100004)
The Spark Program of Earthquake Technology of CEA(XH23005A)
Affiliations
    1 Hebei Hongshan National Observatory on Thick Sediments and Seismic Hazards, 1540 West-Quanbei Street, Xingtai 054000, China
    2 Hebei Earthquake Agency, 262 Huaizhong Road, Shijiazhuang 050021, China
    3 Guangdong Earthquake Agency, 81 Mid-Xianlie Road, Guangzhou 510070, China
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https://castjournals.cast.org.cn/joweb/ddcl/EN/10.14075/j.jgg.2024.04.203
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表12种不同金属材料的力学参数
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Number of
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Number of
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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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