| 吉林省前郭5.8级震群前后波速比变化特征 |
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| 引用本文： | 张洪艳,苗春兰,卢燕红,康建红,张宇.吉林省前郭5.8级震群前后波速比变化特征[J].震灾防御技术,2015,10(3):605-614. |
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| 作者姓名： | 张洪艳 苗春兰 卢燕红 康建红 张宇 |
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| 作者单位： | 吉林省地震局,长春 130117;中国地震台网中心,北京 100045;吉林省地震局,长春 130117;吉林省地震局,长春 130117;吉林省地震局,长春 130117 |
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| 基金项目： | 中国地震局监测、预测、科研三结合课题（150704）;测震台网青年骨干培养专项（20140307）;吉林省地震局合同制科研课题（201521）;吉林省科技发展计划资助项目（20140623010TC） |
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| 摘 要： | 本文选取2001年1月1日—2014年8月31日模拟和数字化地震资料的P波和S波震相,对收集到的数据进行了严格的筛选和限定,利用单台多震和达法和单震多台和达法分别获得了各台站波速比随时间变化曲线以及松原地区波速比空间分布,重点分析了2013年前郭震群发生前后波速比的时空变化特征。结果显示,单台多震和达法得到的净月台、丰满台波速比在2013年前郭震群发生前存在中期异常,2个台站均表现为震前低值中期异常,震后净月台缓慢恢复;单震多台和达法得到的松原地区波速比空间分布显示,松原地区波速比横向不均匀性较强,2013年前郭震群发生前存在椭圆形低值异常区,震后异常区显著缩小。
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| 关 键 词： | 单台多震和达法 单震多台和达法 前郭震群 波速比 |
| 收稿时间： | 2014/12/17 0:00:00 |
Regional Characteristics of Wave Velocity Ratio before and after Qianguo 5.8 Earthquake Swarm |
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| Zhang Hongyan,Miao Chunlan,Lu Yanhong,Kang Jianhong and Zhang Yu.Regional Characteristics of Wave Velocity Ratio before and after Qianguo 5.8 Earthquake Swarm[J].Technology for Earthquake Disaster Prevention,2015,10(3):605-614. |
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| Authors: | Zhang Hongyan Miao Chunlan Lu Yanhong Kang Jianhong and Zhang Yu |
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| Institution: | Earthquake Administration of Jilin Province, Changchun 130117, China;China Earthquake Networks Center, Beijing 100045, China;Earthquake Administration of Jilin Province, Changchun 130117, China;Earthquake Administration of Jilin Province, Changchun 130117, China;Earthquake Administration of Jilin Province, Changchun 130117, China |
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| Abstract: | The P and S wave data of simulated and digital events from Jan. 2001 to Aug. 2014, was selected in order to obtain the wave velocity ratio of the temporal variation for each station by using Wadati method of single station with multi-earthquake and the spatial variation for Songyuan area by using Wadati method of single earthquake with multi-station. We focuses on the temporal and spatial variation before and after Qianguo earthquake swarm. The results show that the temporal variation of Jingyue and Fengman station with single station and multi-earthquake method exist medium-term anomaly, two station all show low value anomaly before earthquake, the wave velocity ratio of Jingyue station recover slowly after earthquake. The spatial variation of Songyuan area with single earthquake and multi-station method show that there exist strong lateral heterogeneity and low value anomaly zone of the oval before Qianguo earthquake swarm in 2013, and the anomaly area significantly reduced after earthquake. |
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| Keywords: | Wadati method of single station and multi-earthquake Wadati method of single earthquake and multi-station Qianguo earthquake swarm Wave velocity ratio |
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