丽江7级地震前高b值演化过程和孕震模式  

EVOLUTION PROCESS OF HIGH B VALUE AND SEISMOGENIC MODE BEFORE THE LIJIANG M7 EARTHQUAKE

作　　者：陈兴凯[1] 蔡静观[2] 

机构地区：[1]云南大学地球科学系,昆明650091 [2]云南省地震局,成都650041

出　　处：《地震研究》1999年第4期330-342,共13页Journal of Seismological Research

基　　金：国家地震局地震科学联合基金

摘　　要：通过１９６５ 年以来云南省第Ⅲ、Ⅳ次强震活跃期间６－７ 级以上强震前一年云南地区ｂ 值全地域扫描图象的对比， 展示了丽江７ 级地震前高ｂ 值的动态演化过程， 并对照坚固体孕震模式和含硬包体试样在破裂孕育过程中声发射ｍ 值与杨氏模量Ｅ 的关系等实验结果， 以及高ｂ 值区和高波速区、余震区的关系， 均表明丽江地震的孕震区具备了坚固体孕震模式的高波速、高杨氏模量的特征。It has shown the dynamic evolution process of high b value before the Lijiang M7 earthquake through the comparison of scanning patterns of b value one year before the M 6 7 earthquakes during the period of Ⅲ and Ⅳ since 1965. Comparing the test results between acoustic emission m value and Young′s modulus in the fracture process in the seismogenic modes of hard body and hard inclusion, considering the relations between high b value region and areas of high wave velocity and aftershocks, it is thought that there has a features of high wave velocity and high Yong′s modulus in seismogenic mode of hard body in the source area of Lijiang earthquake.

关 键 词：丽江地震 高b值 坚固体 孕震模式 地震前兆 

分 类 号：P315.7[天文地球—地震学]