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基于密集台阵的地震烈度及灾情快速评估:以2025年西藏日喀则MS6.8地震为例
吴佳杰, 陈文凯, 贾艺娇, 孙艳萍, 平梓晗, 王墩
PDF(5049 KB)
PDF(5049 KB)
基于密集台阵的地震烈度及灾情快速评估:以2025年西藏日喀则MS6.8地震为例
本研究基于密集远场地震台阵对2025年西藏定日6.8级地震的破裂过程进行快速测定，并结合地震破裂过程对地震烈度分布及潜在人员伤亡进行了快速评估.首先采用反投影技术获取震源区能量释放的时空分布特征，揭示震源破裂的动态演化过程；然后结合破裂过程与基于断层最短距离的地震动参数衰减模型，快速计算地震烈度的空间分布，明确灾害影响范围和强度；在此基础上，利用人员伤亡评估模型对地震可能造成的人员伤亡进行初步估算.研究结果表明，基于密集台阵的地震烈度快速评估方法在震后灾情快速评估方面具有较高的可靠性和实际应用价值，可以为政府决策、应急指挥和救援部署提供重要参考.
In this study, the rupture process of the 2025 Dingri 6.8 magnitude earthquake in Xizang is rapidly determined based on a dense far-field seismic array, and the seismic intensity distribution and potential casualties are rapidly assessed based on the rupture process. First, the back-projection technique is used to obtain the spatial and temporal distribution characteristics of the energy release in the seismic source area, which reveals the dynamic evolution process of the rupture of the seismic source. Then, combining the rupture process with the ground shaking parameter attenuation model based on the shortest distance from the fault, the spatial distribution of the seismic intensity is quickly calculated, and the scope and intensity of the disaster impact are clarified. Based on this, the casualty assessment model is used to make a preliminary estimation on the casualties that may be caused by the earthquake. The results show that the rapid seismic intensity assessment method based on dense seismic array has high reliability and practical application value in the rapid assessment of post-earthquake disaster, which can provide important reference for government decision-making, emergency command and rescue deployment.
seismic intensity / casualty / disaster / earthquake emergency response / earthquakes
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感谢国家地震科学数据中心（http://data.earthquake.cn）、中国地震台网（https://news.ceic.ac.cn）和中国地震局西藏定日6.8级地震现场工作队提供数据支撑！
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