摘要
对比研究了中国西部地区发生的６次中强地震前ｂ值与Ｃ（ｎ）值异常变化特征．６次地震前，ｂ值和Ｃ（ｎ）值都有异常显示．ｂ值异常一般出现较早，最早出现在震前１年左右；Ｃ（ｎ）值异常大多在震前半年至２～３个月出现．ｂ值曲线异常形态一般不太典型，而Ｃ（ｎ）值异常形态较典型，表现为峰值异常．地震前２种异常同时出现．还对计算上述参数的空间范围的选取及窗长和步长的选取进行了讨论．
By contrasting and studying the abnormal variation characteristics of b and C(n) values before six moderately strong earthquakes in the west China,it is found that the shape,appearance time from beginning to end,duration time,combination forms,and so on of abnormality of the two indexes can be used to predict the possible occurrence time of future event.In addition,respectively suitable ranges of the two indexes are discussed.
出处
《西北地震学报》
CSCD
1998年第3期83-88,共6页
Northwestern Seismological Journal
关键词
地震前兆
B值
C值
对比研究
地震活动
Seismicity anomaly, Anomaly duration time, Anomalous shape, Anomalous character, b value, C(n) value
