| 基于余震序列的地震烈度快速评估方法研究——以青海门源6.9级地震为例 |
| |
| 引用本文： | 赵怀群,何少林,陈文凯,司宏俊,尹欣欣,张灿.基于余震序列的地震烈度快速评估方法研究——以青海门源6.9级地震为例[J].西北地震学报,2022,44(2):432-439. |
| |
| 作者姓名： | 赵怀群 何少林 陈文凯 司宏俊 尹欣欣 张灿 |
| |
| 作者单位： | 1. 中国地震局兰州地震研究所;2. 东京大学地震研究所日本 |
| |
| 基金项目： | “十三五”国家重点研发计划项目(2017YFB0504104); |
| |
| 摘 要： | 地震烈度快速评估产品是破坏性地震发生后应急工作"黑箱期"内研判灾情的重要依据.文章基于青海门源6.9级地震震后2 h内的余震序列,采用最短断层距地震动衰减模型快速评估地震烈度.研究结果显示:利用震后30分钟内的余震序列得到的烈度分布可以初步判定重灾区及灾区范围,但灾区范围略小于实际调查结果;利用1.5 h内的余震序列得...
|
| 关 键 词： | 地震烈度 余震 最短断层距 地震动衰减模型 地震应急 青海门源6.9级地震 |
| 收稿时间： | 2022/1/28 0:00:00 |
A rapid evaluation method of earthquake intensity based on the aftershock sequence: a case study of Menyuan M6.9 earthquake in Qinghai Province |
| |
| ZHAO Huaiqun,HE Shaolin,CHEN Wenkai,SI Hongjun,YIN Xinxin,ZHANG Can.A rapid evaluation method of earthquake intensity based on the aftershock sequence: a case study of Menyuan M6.9 earthquake in Qinghai Province[J].Northwestern Seismological Journal,2022,44(2):432-439. |
| |
| Authors: | ZHAO Huaiqun HE Shaolin CHEN Wenkai SI Hongjun YIN Xinxin ZHANG Can |
| |
| Institution: | 1.Lanzhou Institute of Seismology, CEA, Lanzhou 730000, Gansu, China;2.Seismological Research Institute Inc., Tokyo 163-8001, Japan |
| |
| Abstract: | The rapid assessment product of earthquake intensity is an important basis for judging the disaster situation during the " black box period" of emergency response after a destructive earthquake. Based on the aftershock sequence within 2 h after the M6.9 earthquake in Menyuan, Qinghai Province, we used a ground motion attenuation model with the shortest fault distance to rapidly evaluate the earthquake intensity in this paper. The results showed that the intensity distribution obtained by using the aftershock sequence within 30 minutes after the M6.9 mainshock can preliminarily determine the hardest stricken area and the disaster areas, but the scope of disaster areas is smaller than the actual survey result. The intensity distribution obtained by using the aftershock sequence within 1.5 h is consistent with the field investigation results, and the calculation results using the aftershock sequence within 2 h have no obvious change. The seismic intensities obtained using the relocated aftershock sequence are more accurate than those obtained from the conventional aftershock sequence, but a suitable relocated method needs to be selected. In this earthquake, the intensity range evaluated by using the aftershock sequences shows a characteristic that the accuracy is higher with growing intensity, and the hardest-hit areas determined using the result are accurate. The proposed method enriches the existing system of rapid intensity assessment, but its applicability and conditions need to be further studied. |
| |
| Keywords: | seismic intensity aftershocks shortest fault distance ground motion attenuation model earthquake emergency Menyuan M6 9 earthquake in Qinghai Province |
|
| 点击此处可从《西北地震学报》浏览原始摘要信息 |
| 点击此处可从《西北地震学报》下载免费的PDF全文 |
|
