临猗5.0级地震前后品质因子值变化特征研究

英文篇名：Research on temporal change in coda Q-factor before and after the Linyi earthquake with M_L=5.0
中文刊名：地球科学与环境学报
英文刊名：Journal of Earth Science and Enivronmental
作者：王卫东 ; 张永志 ; 杜长娥
英文作者：WANG Wei -dong~1 ; ZHANG Yong-zhi~1 ; DU Chang-e~2 (1. School of Geological Engineering and Surveying Engineering ; Chang’an University ; Xi’an 710054 ; China ; 2.Seismological Bureau of Shaanxi Province ; Xi’an 710068 ; China)
中文关键词：品质因子值 ; 初至波 ; 地震预测 ; 半周期
英文关键词：Q-factor ; first wrival ; earthquake forecast ; half period
出版日期：2005-03-15
机构：长安大学地质工程与测绘工程学院,长安大学地质工程与测绘工程学院,陕西省地震局陕西西安710054 ,陕西西安710054 ,陕西西安710068
年：2005
期：01
出版单位：地球科学与环境学报

摘要

利用西安数字地震遥测台网记录的数字地震资料,采用P波初动半周期残差法求得 1998 年 7月临猗5.0级地震前后不同路径的Q(品质因子)值变化,发现在地震发生前Q值为87~203,震后Q值为67~164,震前震中区附近出现明显的高Q值异常。结果表明,地震前的高Q值异常可以作为地震预测的一种手段。
By using the digital data recorded by Xi’an digital telemetry seismic network,the temporal change in Q-factor before and after Linyi earthquake with M_L=5.0 in July,1998 is determined through the method for half period of the first arrival P wave. It is pointed that the Q-factor is 87~203 before the earthquake and is 67~164 after the earthquake,and clear anomaly with high Q-factor appeared in the nearby areas of the epicenter before the earthquake. The result shows that anomaly with high Q-factor before a earthquake can be used as a method for earthquake forecast.

引文

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