甘肃地区3次中强地震前两种地震学前兆变化特征
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摘要
根据Allegre的地壳介质破裂的尺度理论研究了甘肃地区近期3次中强地震前两种地震学前兆(地震空间相关长度和尾波Qc值)的变化特征。结果表明,在3次地震前这两种参数都表现出增长的特征,并可用幂次率关系拟合。
In this paper we studied the characteristics of two seismological precursors(seismic spatial correlation length and coda Qc) associated with three moderate-strong earthquakes occurred in Gansu province,China,based on Allegre′s scale-rule theory of rock fracture.The results show that an increasing trends of seismic spatial correlation length and coda Qc appeared before the three earthquakes.A power exponent relation is used to fit the increasing variation form of these two parameters.
In this paper we studied the characteristics of two seismological precursors(seismic spatial correlation length and coda Qc) associated with three moderate-strong earthquakes occurred in Gansu province,China,based on Allegre′s scale-rule theory of rock fracture.The results show that an increasing trends of seismic spatial correlation length and coda Qc appeared before the three earthquakes.A power exponent relation is used to fit the increasing variation form of these two parameters.
引文
[1]Allegre C J,Le Mouel J L,Provost A.Scaling rules in rock fracture and possible implications forearthquake prediction[J].Nature,1982,297:47-49.
[2]Aki K,Chouet B.Origin of Coda wave:Source,attenuation and scattering effects[J].J GeophysRes,1975,80:3 322-3 342.
[3]荣代潞,李亚荣,韩晓明.地壳介质破裂的尺度理论在研究山丹—民乐6.1级地震的地震学前兆中的应用[J].地震学报,2006,28(4):438-446.
[4]Zoller G,Hainzl S,Kurths J.Observation of growing correlation length as an indicator for criticalpoint behavior prior to large earthquakes[J].J Geophys Res,2001,106(2):2 167-2 175.
[5]荣代潞,李亚荣,刘旭宙.甘肃及邻近地区几次中强地震前地震空间相关长度增长的研究[J].地震学报,2004,26(5):509-515.
[6]Bruce A,Wallace D.Critical point phenomena:Universal physics at large length scales.in the NewPhysics[M].edit by P.Dawis,Cambridge Univ.Press,New York,1989.236-267.
[7]Frohlich C,Davis D.Single-link cluster analysis as a method to evaluate spatial and temporal proper-ties of earthquake catalogues[J].Geophys J Int,1990,100:19-32.
[8]Davis S D,Frohlich C.Single-link clusteranalysis,synthetic earthquake catalogues,and after shock i-dentification[J].Geophys J Int,1991,104:289-306.
[9]郭增建,秦保燕.地震成因和地震预报[M].北京:地震出版社,1991.78-79.
[2]Aki K,Chouet B.Origin of Coda wave:Source,attenuation and scattering effects[J].J GeophysRes,1975,80:3 322-3 342.
[3]荣代潞,李亚荣,韩晓明.地壳介质破裂的尺度理论在研究山丹—民乐6.1级地震的地震学前兆中的应用[J].地震学报,2006,28(4):438-446.
[4]Zoller G,Hainzl S,Kurths J.Observation of growing correlation length as an indicator for criticalpoint behavior prior to large earthquakes[J].J Geophys Res,2001,106(2):2 167-2 175.
[5]荣代潞,李亚荣,刘旭宙.甘肃及邻近地区几次中强地震前地震空间相关长度增长的研究[J].地震学报,2004,26(5):509-515.
[6]Bruce A,Wallace D.Critical point phenomena:Universal physics at large length scales.in the NewPhysics[M].edit by P.Dawis,Cambridge Univ.Press,New York,1989.236-267.
[7]Frohlich C,Davis D.Single-link cluster analysis as a method to evaluate spatial and temporal proper-ties of earthquake catalogues[J].Geophys J Int,1990,100:19-32.
[8]Davis S D,Frohlich C.Single-link clusteranalysis,synthetic earthquake catalogues,and after shock i-dentification[J].Geophys J Int,1991,104:289-306.
[9]郭增建,秦保燕.地震成因和地震预报[M].北京:地震出版社,1991.78-79.
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