考虑P波预警参数的震源破裂特征实时持续估测方法

彭朝勇; 程振鹏; 郑钰; 徐志强

doi:10.3799/dqkx.2023.167

Volume 49 Issue 2

Feb. 2024

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Peng Chaoyong, Cheng Zhenpeng, Zheng Yu, Xu Zhiqiang, 2024. Real-Time Continuous Estimation of Seismic Source Rupture Characteristics Considering P-Wave Early Warning Parameters. Earth Science, 49(2): 391-402. doi: 10.3799/dqkx.2023.167

Citation:

Peng Chaoyong, Cheng Zhenpeng, Zheng Yu, Xu Zhiqiang, 2024. Real-Time Continuous Estimation of Seismic Source Rupture Characteristics Considering P-Wave Early Warning Parameters. Earth Science, 49(2): 391-402. doi: 10.3799/dqkx.2023.167

Citation:

Peng Chaoyong, Cheng Zhenpeng, Zheng Yu, Xu Zhiqiang, 2024. Real-Time Continuous Estimation of Seismic Source Rupture Characteristics Considering P-Wave Early Warning Parameters. Earth Science, 49(2): 391-402. doi: 10.3799/dqkx.2023.167

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Real-Time Continuous Estimation of Seismic Source Rupture Characteristics Considering P-Wave Early Warning Parameters

doi: 10.3799/dqkx.2023.167

1.
Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
2.
Key Laboratory of Earthquake Source Physics, China Earthquake Administration, Beijing 100081, China

Received Date: 2023-01-30
Publish Date: 2024-02-25

Abstract

Abstract

By introducing the real-time estimation method of seismic source rupture characteristics in to an earthquake early warning system (EEWS), we can effectively overcome the shortcomings of the traditional point-source-model-based estimation of target warning intensity and potential damage zones, and improve the disaster mitigation effectiveness of an EEWS. The real-time performance of existing methods is usually only at the minute level, which cannot meet the high timeliness requirements of EEWSs. In this work, we developed a real-time method to continuously estimate source rupture characteristics considering P-wave warning parameters. This method is an improvement of the finite rupture template matching method, namely FinDer. The system test results show that the results obtained using this method are about 3 s faster compared to the FinDer algorithm results at the same moment after the earthquake, and the results of individual earthquake cases are 5 s faster. Additionally, at the early stage of rupture, there are large fluctuations in the obtained strike θ due to the influence of seismic radiation diversity, site, propagation path and other factors. As the rupture continues, θ will gradually converge to the reference value. Moreover, for earthquakes of magnitude less than M7.0, relatively stable rupture characteristic parameter results can be obtained 6-10 s after the earthquake origin, while for M7.0+ earthquakes, it takes longer time, especially for mega-earthquakes such as the Wenchuan M8.0 event, whose results need to be gradually stabilized only at 40 s after the origin with relatively sparse station coverage.
- source rupture characteristics,
- P-wave early-warning parameters,
- finite template matching,
- real-time waveform data,
- earthquake

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References(46)

References

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Real-Time Continuous Estimation of Seismic Source Rupture Characteristics Considering P-Wave Early Warning Parameters

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