| 基于2014年云南地区地震的地震预警参数与快速震级估算研究 |
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| 引用本文： | 李鸿杰,张建经,陈逸民,余宽原,韩嘉怡,樊惠惠,胡蓉平.基于2014年云南地区地震的地震预警参数与快速震级估算研究[J].世界地震工程,2018,34(2):123-131. |
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| 作者姓名： | 李鸿杰 张建经 陈逸民 余宽原 韩嘉怡 樊惠惠 胡蓉平 |
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| 作者单位： | 西南交通大学 交通隧道工程教育部重点实验室, 土木工程学院, 成都 610031 |
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| 摘 要： | 根据2014年云南地区M6.1盈江地震、M6.5鲁甸地震和M6.6景谷地震的主震、余震P波初期部分的信息，研究了地震震级快速估算中3个预警参数（最大卓越周期τpmax、特征周期τc和最大位移幅值Pd）与震级的相关性，提出了云南地区的震级估计模型，并对其进行分析，再和其它地区的震级估计模型进行对比和评价。结果表明:3种方法均能在短时间内（2~4 s）有效地进行震级估算，Pd方法估算效果最优，τc方法次优，τpmax方法较弱。在震级较大的主震震级估计中，3种方法均没有出现明显的震级低估（震级饱和）现象。对于τpmax方法，云南地区的估计模型与南加州地区较为接近，但与四川地区区别较大，可能与该方法的计算稳定性有关；而τc方法的估计模型则与四川及世界其它地区均较为接近，更具有普适性和稳定性。在地震预警系统的实际应用中，由于云南地区尚未建立密集的地震监测台网系统，因此在短时间内难以得到较为准确的震中距。与震源距相独立的τpmax和τc两种算法则显得较为实用，其中:τc方法略优于τpmax方法，同时能较好地满足地震预警系统的精度要求，因此推荐使用τc方法应用于云南地区地震预警系统中的快速震级估算。
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| 关 键 词： | 云南地区 盈江地震 鲁甸地震 景谷地震 地震预警 震级估算 |
Research on earthquake early warning parameters and rapid magnitude estimation based events in Yunnan region in 2014 |
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| LI Hongjie,ZHANG Jianjing,CHEN Yimin,YU Kuanyuan,HAN Jiayi,FAN Huihui,HU Rongping.Research on earthquake early warning parameters and rapid magnitude estimation based events in Yunnan region in 2014[J].World Information On Earthquake Engineering,2018,34(2):123-131. |
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| Authors: | LI Hongjie ZHANG Jianjing CHEN Yimin YU Kuanyuan HAN Jiayi FAN Huihui HU Rongping |
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| Affiliation: | Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | In this research, the correlation between magnitude and three earthquake early warning parameters (τpmax, τc and Pd)obtained from the early portion of P-waves for the main-and after-shocks of M 6.1 Yingjiang earthquake, M 6.5 Ludian earthquake and M 6.6 Jinggu earthquake in 2014 in Yunnan were studied. And the paper estimation models were analyzed, evaluated and compared with other regions. The results indicate that three methods can be effectively used for magnitude estimation in a short time (2~4 s). In general, Pd method works best in magnitude estimation, and then τc method, finally τpmax method. For large scale earthquakes, all of three methods do not come up the obvious magnitude underestimation (saturation) phenomenon. For τpmax method, the model in Yunnan is close to the one in Southern California instead of Sichuan region, which might be due to the stability of this algorithm. For τc method, the model in Yunnan is close to the one in Sichuan and other regions with the higher feasibility and stability. In the practical application of earthquake early warning system, at present the seismic networks have not yet been set up in Yunnan. Hence, it is difficult to get a relatively accurate epicentral distance in a short time. So τpmax and τc method which are independent with distance are more practical. What is more, τc method is slightly better than τpmax method and it can well satisfy the requirement of the earthquake early warning system. τc method is recommended to apply in rapid magnitude estimation of earthquake early warning system in Yunnan region. |
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| Keywords: | Yunnan region Yingjiang earthquake Ludian earthquake Jinggu earthquake earthquake early warning magnitude estimation |
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