摘要
利用青海地震烈度衰减模型和基于断层最短距离的地震动参数衰减模型对青海玛多7.4级地震的烈度分布进行快速评估,将评估结果与实际烈度图对比分析。研究结果表明:两种模型可以在地震正式速报后1分钟内得到地震烈度分布的快速评估结果,时效性强,可以在最短的时间内为应急指挥和救援工作提供参考;青海地震烈度衰减模型计算结果比较理想化,在大致范围上有一定的参考性,但在重灾区范围上与此次实际结果存在偏差;基于断层最短距离的地震动参数衰减模型的PGV-vS30计算结果较青海地震烈度衰减模型更为精细,在高烈度区的评估中具有较好的实际应用价值;相较于冉洪流等研究的地表破裂与震级的经验关系,Wells等研究的经验关系在本次地震中的适用性更好。文章研究结果在此次实际地震应急响应中进行了应用,为政府应急指挥决策和应急救援提供了重要数据支撑。
The intensity distribution of Maduo,Qinghai M7.4 earthquake in 2021 was evaluated rapidly by using the Qinghai seismic intensity attenuation model and the ground motion parameters attenuation model based on the shortest fault distance,and the evaluation results were compared with the actual intensity map.The research results showed that the two models can both get the quick evaluation results of earthquake intensity distribution within 1 minute after the official quick report,thus providing reference for emergency command and rescue work in the shortest time.The calculation results of Qinghai seismic intensity attenuation model have a certain reference value in the general range,but there is a deviation from the actual results in the severely affected areas.The PGV-vS30 calculation results of the ground motion parameters attenuation model are more precise than those of the Qinghai seismic intensity attenuation model,thus having a good practical application value in the evaluation of high intensity area.Compared with the empirical relationship between surface rupture and magnitude proposed by RAN Hongliu,the empirical relationship proposed by Wells is more applicable in Qinghai area.The research results of this paper are applied in the emergency response of this M7.4 earthquake,and provide important data support for the government emergency command and emergency rescue.
作者
张灿
陈文凯
司宏俊
赵怀群
ZHANG Can;CHEN Wenkai;SI Hongjun;ZHAO Huaiqun(Lanzhou Institute of Seismology, CEA, Lanzhou 730000, Gansu, China;Xihua University, Chengdu 610039, Sichuan, China)
出处
《地震工程学报》
CSCD
北大核心
2021年第4期876-882,共7页
China Earthquake Engineering Journal
基金
中国地震局地震预测研究所基本科研业务专项(2020IESLZ05)
“十三五”国家重点研发计划项目(2017YFC1500906)。
关键词
地震烈度
快速评估
地震应急
青海玛多7.4级地震
地震动参数衰减模型
seismic intensity
rapid assessment
earthquake emergency
Maduo M7.4 earthquake in Qinghai Province
attenuation model for ground motion parameters
