1996年3月19日新疆阿图什6.7级地震前震群的时空分布特征
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摘要
分析了1996年3月19日新疆阿图什6.7级地震前震群活动的时空分布特征。研究主要结果:(1)阿图什6.7级地震前,震群的空间分布在未来大震震中附近集中,同时大致围成一个长轴约119 km和短轴约110 km的椭圆,阿图什6.7级地震落入椭圆靠边部位;(2)震群的时间进程表明,大震之前约4个月震群活动速率加快,标志着中期异常向短期异常的阶段性转折。最后,对所得结果的可能物理机制以及在地震预报中的应用等问题进行了讨论。
The article studies the spatial and temporal distribution characteristic of earthquake swarm activity before Atushi earthquake of MS6.7 on March 19,1996,in Xinjiang.The main result is as follows,(1) Before the MS6.7 earthquake,the earthquake swarms in space concentrate near this big earthquake,and approximately form an elliptical shape with long axis of 119 km and short axis of 110 km.The MS6.7 earthquake locates on the edge of the elliptical area;(2) The time process of earthquake swarms indicates that the activity of the earthquake swarms increases about 4 months before the big earthquake,which shows that the medium-term abnormity turns into the short-term one.In addition,the article discusses the possible physical mechanism of the result and its application to earthquake prediction etc.
The article studies the spatial and temporal distribution characteristic of earthquake swarm activity before Atushi earthquake of MS6.7 on March 19,1996,in Xinjiang.The main result is as follows,(1) Before the MS6.7 earthquake,the earthquake swarms in space concentrate near this big earthquake,and approximately form an elliptical shape with long axis of 119 km and short axis of 110 km.The MS6.7 earthquake locates on the edge of the elliptical area;(2) The time process of earthquake swarms indicates that the activity of the earthquake swarms increases about 4 months before the big earthquake,which shows that the medium-term abnormity turns into the short-term one.In addition,the article discusses the possible physical mechanism of the result and its application to earthquake prediction etc.
引文
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[2]宋俊高,陆远忠,施玉芳,等.震群用于地震预报的实用程式研究[C]//许绍燮,陆远忠,朱传镇.地震预报方法实用化研究文集(地震学专辑).北京:学术书刊出版社,1989:204-228.
[3]姜秀娥,陈非比.区域震群与唐山大震[J].地震学报,1983,5(2):145-157.
[4]梅世蓉,冯德益,张国民,等.中国地震预报概论[M].北京:地震出版社,1993:74.
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[6]Varnes D J.predicting earthquakes by analyzing accelerating precursory seismic activity,Pure appl[J].Geophys,1989,130:661-686.
[7]Jones M,Molar P.Some characteristics of foreshocks and their possible relationship to earthquake prediction and premonitoryslip on faults[J].J.G.R.,1979,84:3 596-3 608.
[8]蒋海昆,马胜利,周焕鹏,等.双向压缩条件下非均匀断层标本变形过程中的声发射活动特征[J].地震学报,2006,28(3):295-304.
[9]马宗晋.华北地壳的多(应力集中)点场与地震[J].地震地质,1980,2(1):39-47.
[10]许绍燮,沈佩文.北京周围地区地震的分布特点与地壳屈曲[J].地震学报,1980,2(3):153-167.
①敖雪明,龙海英,王桂岭.新疆天山震群与强震关系的研究,2006年.
[2]宋俊高,陆远忠,施玉芳,等.震群用于地震预报的实用程式研究[C]//许绍燮,陆远忠,朱传镇.地震预报方法实用化研究文集(地震学专辑).北京:学术书刊出版社,1989:204-228.
[3]姜秀娥,陈非比.区域震群与唐山大震[J].地震学报,1983,5(2):145-157.
[4]梅世蓉,冯德益,张国民,等.中国地震预报概论[M].北京:地震出版社,1993:74.
[5]国家地震局科技监测司.地震学分析预报方法程式指南[M].北京:地震出版社,1990.
[6]Varnes D J.predicting earthquakes by analyzing accelerating precursory seismic activity,Pure appl[J].Geophys,1989,130:661-686.
[7]Jones M,Molar P.Some characteristics of foreshocks and their possible relationship to earthquake prediction and premonitoryslip on faults[J].J.G.R.,1979,84:3 596-3 608.
[8]蒋海昆,马胜利,周焕鹏,等.双向压缩条件下非均匀断层标本变形过程中的声发射活动特征[J].地震学报,2006,28(3):295-304.
[9]马宗晋.华北地壳的多(应力集中)点场与地震[J].地震地质,1980,2(1):39-47.
[10]许绍燮,沈佩文.北京周围地区地震的分布特点与地壳屈曲[J].地震学报,1980,2(3):153-167.
①敖雪明,龙海英,王桂岭.新疆天山震群与强震关系的研究,2006年.
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