龙岩台倾斜仪三次震前异常差异分析  

作　　者：陈传昌 杨佩琴[2] 郑建志[2] 张志鹏 吴慧敏 

机构地区：[1]南平地震台,福建南平353000 [2]龙岩地震台,福建龙岩364000

出　　处：《科技创新与应用》2021年第34期73-78,共6页Technology Innovation and Application

基　　金：福建省地震局台站科研基金(编号:T202005)。

摘　　要：1992年连城赖源5.1级地震、1997年永安西南5.3级地震、2008年7月5日长泰4.7级地震前龙岩垂直摆倾斜仪出现连续的大幅度异常变化。通过对垂直摆前兆异常的分析、判定,结合震源机制、地震要素、地质构造背景,从龙岩台倾斜三次异常变化来看,异常幅度和持续时间不一定跟未来可能发生的地震具有简单的线性对应关系,还受区域地质构造背景以及区域应力影响。经历多次构造运动,地壳结构已经是一个相当复杂的“多米诺骨牌”,相互之间的关联似有非有,千丝万缕。这也是地震预报的复杂性所在。地震前兆异常往往不具有复制性。Before the 1992 Liancheng Laiyuan Ms5.1 earthquake,the 1997 southwest of Yong'an Ms5.3 earthquake,and the Changtai Ms4.7 earthquake on July 5,2008,Longyan's vertical pendulum tiltmeter showed continuous large amplitude abnormal changes.Based on the analysis and determination of vertical pendulum precursory anomaly,as well as focal mechanism,seismic elements and geological structure background,from the three abnormal changes of Longyan tilt,the amplitude and duration of anomaly may not necessarily have a simple linear corresponding relationship with future earthquakes,but also affected by regional geological structure background and regional stress.After many tectonic movements,the crustal structure has been a rather complex"domino",and the correlation between them seems to be inextricably linked.This is also the complexity of earthquake prediction.Earthquake precursory anomalies are often not reproducible.

关 键 词：倾斜 异常变化 震源机制 地震预报 

分 类 号：P315[天文地球—地震学]