信息量直接计算法在甘肃－宁夏－青海地区前兆标志体系研究中的应用  

APPLICATION OF DIRECT COMPUTING METHOD OF INFORMATION CONTENT IN THE RESEARCH ON THE PRECURSOR INDEX SYSTEM IN THE GANSU-NINGXIA-QINGHAI REGION

作　　者：王振亚[1] 钱家栋[1] 郭大庆[1] 李佐唐[1] 孙景芳[1] 

机构地区：[1]国家地震局兰州地震研究所

出　　处：《西北地震学报》1995年第2期33-39,共7页Northwestern Seismological Journal

基　　金：国家地震局"八五"攻关项目

摘　　要：本文提出了异常前兆信息量的直接计算法，实现了各种观测资料前兆异常的无量纲前兆信息量转换。用该方法对甘、宁、青地区５种观测手段共９２个测项的５日均值一阶差分相关异常进行了前兆信息量计算。通过２４次５级以上相关地震的回顾性分析研究，求得了９２个测项的有效单位异常平均信息量，为前兆标志体系的进一步研究打下了良好的基础。又通过７次７级以上相关地震前兆信息量变化特征的统计，给出了一组预报地震三要素参考指标。In this paper the direct computing method of precursor information content of anomalies is put forward,and the transformation of non-dimensional precursor information content of precursory anomalies of various observation data has come true. By means of this method we have accomplished the calculation of precursor information content of correlative anomalies which are extracted from the difference values of five-day average from 92 observation items distributed over Gansu,Ningxia and Qinghai.On the basis of reviewed research on the 2 4 Ms≤5.0 earthquakes we have obtained effective average information contents of unit anomaly about 92 observation items,which become not only important references for earthquake prediction but also a good foundation for the further research on the precursor index system. According to the statistical analysis on the change characteristics of precursor information of Ms≥5.0 earthquakes,the reference indexes of three elements of earthquake prediction are given.

关 键 词：前兆信息 甘肃 宁夏 预报指标 地震 信息量 

分 类 号：P315.63[天文地球—地震学]