固体潮高时段地震活动特征与小震调制比R_m异常的判定  

THE CHARACTERISTICS OF SEISMICITY DURING HIGHER EARTH TIDES AND THE DETERMINATION OF ANOMALIES OF SMALL EARTHQUAKE MODULATION RATIO R_m

作　　者：谷光裕[1] 王玉莹[1] 赵振[1] 孙文福[1] 

机构地区：[1]辽宁省地震局,沈阳110031

出　　处：《东北地震研究》1999年第4期9-17,共9页Seismological Research of Northeast China

基　　金：辽宁省科委资助项目!辽宁省地震预报短临指标的研究(97806009)

摘　　要：本文用固体潮高时段地震（调制小震）活动性图象演化过程，综合判定小震调制比Ｒｍ的异常值，提高Ｒｍ凡异常在中短预报地震的效能，并对小震调制比地震预报方法资料区域选择问题进行了一些探讨，提出区域过小或不适当的区域选择都可能产生不合理的Ｒｍ异常．在对辽宁及邻近地区５级左右地震短临预报指标的研究中，显示出用固体潮高时段地震形成的强震前空区活动图象比用全部地震形成空区图象特征更加明显的特征．In this paper. it is shown that to determine synthetically anomalies of small earthquake modulation ratio Rm. by using evolution course of seismicity pattern of earthquakes (small modulated earthquakes) during higher earth tides is able to improve the efficacy of Rm anomalies to mid-term and short-term prediction of earthquakes.Some discussion of the selection of data region in earthquake prediction by earthquake modulation ratio method is made, and it indicates that irrational Rm anomalies will occur if the region is too small or the selection of the region is improper The researches on short-term prediction indexes of earthquakes of 5.0 or so in Liaoning and its adjacent areas illustrate that the characteristics of the gap eismicity pattern before strong earthquakes formed by using the earthquakes during the earthquakes during higher tides is more obvious than that formed by using all the earthquakes.

关 键 词：固体潮 地震活动 调制地震 地震预报 Rm异常 空间分布 

分 类 号：P315.75[天文地球—地震学]