甘肃地区3次中强地震前两种地震学前兆变化特征  

Characteristics of Two Seismological Precursors before Three Moderate-strong Earthquakes Occurred in Gansu Region

作　　者：荣代潞 李亚荣 

机构地区：[1]兰州地球物理国家野外科学观测研究站,甘肃兰州730000 [2]地震预测研究所兰州科技创新基地,甘肃兰州730000

出　　处：《地震》2011年第3期56-63,共8页Earthquake

基　　金：中国地震局地震预测研究所基本科研业务专项(A80)

摘　　要：根据Allegre的地壳介质破裂的尺度理论研究了甘肃地区近期3次中强地震前两种地震学前兆(地震空间相关长度和尾波Qc值)的变化特征。结果表明,在3次地震前这两种参数都表现出增长的特征,并可用幂次率关系拟合。In this paper we studied the characteristics of two seismological precursors（seismic spatial correlation length and coda Qc） associated with three moderate-strong earthquakes occurred in Gansu province,China,based on Allegre′s scale-rule theory of rock fracture.The results show that an increasing trends of seismic spatial correlation length and coda Qc appeared before the three earthquakes.A power exponent relation is used to fit the increasing variation form of these two parameters.

关 键 词：地震学前兆 尾波QC值 地震空间相关长度 甘肃地区 

分 类 号：P315.7[天文地球—地震学]