地下爆炸Lg波地震矩与源地震矩关系数值模拟

王旭亮; 靳平; 王晓明; 刘哲函; 唐伟; 徐妍妍; 李俊杰

doi:10.3799/dqkx.2025.300

Volume 51 Issue 2

Feb. 2026

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Article Navigation > Earth Science > 2026 > 51(2): 647-656

Wang Xuliang, Jin Ping, Wang Xiaoming, Liu Zhehan, Tang Wei, Xu Yanan, Li Junjie, 2026. Numerical Simulation on the Relationship between Seismic Moment of Lg Wave and Source of Underground Explosion. Earth Science, 51(2): 647-656. doi: 10.3799/dqkx.2025.300

Citation:

Wang Xuliang, Jin Ping, Wang Xiaoming, Liu Zhehan, Tang Wei, Xu Yanan, Li Junjie, 2026. Numerical Simulation on the Relationship between Seismic Moment of Lg Wave and Source of Underground Explosion. Earth Science, 51(2): 647-656. doi: 10.3799/dqkx.2025.300

Citation:

Wang Xuliang, Jin Ping, Wang Xiaoming, Liu Zhehan, Tang Wei, Xu Yanan, Li Junjie, 2026. Numerical Simulation on the Relationship between Seismic Moment of Lg Wave and Source of Underground Explosion. Earth Science, 51(2): 647-656. doi: 10.3799/dqkx.2025.300

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Numerical Simulation on the Relationship between Seismic Moment of Lg Wave and Source of Underground Explosion

doi: 10.3799/dqkx.2025.300

Wang Xuliang^{1
,
,},
Jin Ping^{2
,
,
,},
Wang Xiaoming¹,
Liu Zhehan¹,
Tang Wei¹,
Xu Yanan¹,
Li Junjie¹

1.
CTBT Beijing National Data Center and Beijing Radionuclide Laboratory, Beijing 100085, China
2.
Northwest Institute of Nuclear Technology, Xi'an 710024, China

Received Date: 2025-10-13
Publish Date: 2026-02-25

Abstract

Abstract

Regarding the estimation of yield of underground explosions, this study systematically investigates the influence of burial depth, source components(ISO, CLVD, DC, and their combinations), and site conditions on the relationship between the source seismic moment M₀(source) and the Lg-wave seismic moment M₀(Lg). Based on theoretical synthetic seismogram simulations and Lg-wave spectral inversion methods, we quantitatively calibrated the M₀(source)/ M₀(Lg) ratio for different test sites. The results reveal significant site dependence: the ratio generally exceeds 0.2 for the North Korean site but falls below 0.2 for the Nevada site. Secondary sources(e.g., CLVD and DC) reduce Lg-wave excitation efficiency in the North Korean site by up to 50%, while increased burial depth weakens P-S conversion effects, further decreasing the ratio. By integrating a seismic source model, we established a yield estimation method based on M₀(Lg) and validated it using data from North Korea's sixth nuclear test.
- source seismic moment,
- Lg wave,
- source model,
- yield estimation,
- synthetic seismogram

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References(32)

References

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