滇西北东条带地震围空及条带与中强地震的时空关系
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摘要
利用1970年1月1日至2008年12月31日云南省地震遥测台网记录的地震目录,对中强以上地震进行余震删除。利用已删除余震的正式目录,研究滇西北东条带中强地震前地震空区及条带的分布情况。1970年以来滇西北东条带共发生31组5.0级以上地震,其中19组地震前存在地震空区、条带现象,占61%。中强地震发生地点与地震前空区、条带分布区域密切相关,在其内部或边缘区域。中强震发生时间与空区和条带结束时间相关,在其结束后半年内发震,对地震短临预测具有一定实际意义。
According to the official catalog of the seismic records from Jan.1,1970 to Dec.31,2008 recorded by the seismic network in Yunnan Province,removing the aftershocks,we have researched the seismicity of northwestern Yunnan zone before strong earthquakes and the distribution of strips.Since 1970,in the east of northwestern Yunnan Province there happened a total of 31 groups of earthquakes of 5.0 and above,of which seismic gaps and strips phenomenon occurred before 19 groups.The proportion is 61%.The locations of strong earthquakes are closely related to the earthquake gaps and the distribution of regional strips. Strong earthquakes just happened within the earthquake gaps,the internal or edge of strip regions.Strong earthquakes happened in the earthquake gaps after the earthquake strips ended. Strong earthquakes always took place within 6 months after the end of the earthquake gaps and strips.So this has some practical significance to the impending of earthquake prediction.
According to the official catalog of the seismic records from Jan.1,1970 to Dec.31,2008 recorded by the seismic network in Yunnan Province,removing the aftershocks,we have researched the seismicity of northwestern Yunnan zone before strong earthquakes and the distribution of strips.Since 1970,in the east of northwestern Yunnan Province there happened a total of 31 groups of earthquakes of 5.0 and above,of which seismic gaps and strips phenomenon occurred before 19 groups.The proportion is 61%.The locations of strong earthquakes are closely related to the earthquake gaps and the distribution of regional strips. Strong earthquakes just happened within the earthquake gaps,the internal or edge of strip regions.Strong earthquakes happened in the earthquake gaps after the earthquake strips ended. Strong earthquakes always took place within 6 months after the end of the earthquake gaps and strips.So this has some practical significance to the impending of earthquake prediction.
引文
刘丽芳,付虹.2003年云南大姚6． 2级、6． 1级地震中短期地震学异常演化特征[J].地震地磁观测与研究,2005,26(5) : 33 38．
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