楚雄台倾斜潮γ因子的变化及其地震异常特征  

Γ FACTOR VARIATION OF TILTING TIDE FROM SEISMOLOGlCAL OBSERVATORY OF CHUXIONG AND ITS ANOMALOUS CHARACTERISTICS TO EARTHQUAKE

作　　者：何翔[1] 

机构地区：[1]云南省地震局

出　　处：《地震研究》1994年第3期248-253,共6页Journal of Seismological Research

摘　　要：用维尼迪科夫调和分析方法，对楚雄台倾斜固体潮观测资料（１９８５—１９９０）进行了调和分析，研究Ｍ＿２波γ值的时间变化及其与地震的关系，发现其特征是：１．正常情况下，楚雄台γ值没有时间变化；地震的孕育与发生致使γ值有１．０％—９．３％的短期震兆变化；２．七级大震孕育时期，γ值存在趋势性变化；３．γ值的变化是非均匀的，它与构造活动有关；４．小震群活动对γ值影响甚大。Using the Venedicov harmonic analysis method, the harmonic anlysis of the earth-tide observation data from seismological observatory of Chuxiong (1985-1990)is made and the relation between variation of γ value of M2 wave with time and earthquake is studied, and some characteristics are found as follows:1. No variation of γ value with time was found under normal conditions.but preparaction and occurrence of earthquake caused short-term earthquake precursor variation in γ value ranging from 1.0 percent to 9.3 percent;2. There was trend variation in γ value during the preparation of large magnitude 7 earthquake; 3. Uneven rariation in γ value relating to tectonic activity;4. Variation in γ value was affected striking by small earthquake-swarm activity.

关 键 词：地震前兆 固体潮 地倾斜 γ因子 

分 类 号：P315.7[天文地球—地震学]