震后趋势判断中尾波振幅衰减特征k值的研究
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摘要
利用唐山、浑源、岫岩和浙江省的鄞县、珊溪水库地震等不同地震类型的数字地震波资料,经过筛选和整理,对每一个地震序列求出几个台站的尾波振幅衰减特征,k值随时间序列的变化特征。结果表明,虽然k值的变化趋势比较复杂,但还是发现不同震型的k值的变化特征有所不同。从趋势上来说,在主震前后,主震-余震型地震的k值显示先低后高的趋势,震群型地震显示先高后低的趋势。我们可以根据这个特征来判断所发生地震的震型,用于震后地震趋势快速判断。
The digital earthquake wave data of several stations from different type earthquake sequence of Tangshan, Hunyuan, Xiuyan, Yinxian and Shanxi reservoir had been obtained and worked out attenuation coefficient k-value of coda wave amplitude. k-value′s variation with time indicates that although the variation is very complicated, but different type earthquake sequence has different variation characteristics. Before and after main shock, k-value for mainshock-aftershock type shows low level in earlier and high level in later, but show counter for cluster type. This characteristic can be used to judge the type of earthquake and estimate shock tendency.
The digital earthquake wave data of several stations from different type earthquake sequence of Tangshan, Hunyuan, Xiuyan, Yinxian and Shanxi reservoir had been obtained and worked out attenuation coefficient k-value of coda wave amplitude. k-value′s variation with time indicates that although the variation is very complicated, but different type earthquake sequence has different variation characteristics. Before and after main shock, k-value for mainshock-aftershock type shows low level in earlier and high level in later, but show counter for cluster type. This characteristic can be used to judge the type of earthquake and estimate shock tendency.
引文
啜永清,张淑亮,李冬梅.2003.1999年11月1日山西大同-阳高5.6级地震[M].见:中国震例,北京:地震出版社,373~397
高龙生.1985.Q值研究的进展和问题[J].地震地磁观测和研究,6(1):3~6
华正兴,梁静,马云生等.1994.北京1990年大海陀山地震尾波Qc-1随时间变化[J].地震地磁观测与研究,16(2):204~211
陆远忠,陈章立,王碧全等.1985.地震预报的地震学方法[M].北京:地震出版社,112~116
卢振恒,李荣安,全蓥道等.1990.80年代日本地震预报研究进展[M].北京:海洋出版社,159~164
万波.2002.岫岩-海城5.6级地震的地震地质背景及其发震构造[J].东北地震研究,16(2):25~32
王海涛,敖雪明,杨马陵等.1992.单台地震预报的地震学方法[M].北京:地震出版社,47~49
薛丁,阎海滨,曹井泉.2002.1996年5月3日内蒙古自治区包头西6.4级地震[M].见:中国震例,北京:地震出版社,371~389
姚立,虞雪君,陈乃其.1996.鄞县ML3.9和4.7地震的震源参数[J].地震学刊,(3):1~5
姚立,虞雪君,汪进等.1993.民乐盆地及其周围地区的Q值研究[J].地震学报,15(3):296~302
中国地震局监测预报司.1999.一九九八年张北地震[M].北京:地震出版社,1~4
Aki K.1969.Analysis of seismic coda of local earthquakes as scattered waves[J].J Geophys Res,74(2):615~631
Aki K,Chouet B.1975.Origin of coda waves:source,attenuation,and scattering effects[J].J Geophys Res,80(23):3322~3342
Aki K.1980b.Scatting and attenuation of shear waves in the lithosphere[J].J Geophys Res,85,6496~6504
Gusev A A.1997.Temporal variations of the coda decay rate on Kamchatka:Are they real and precursory[J].J Geophys Res,102(B4):8381~8396
Jin Anshu and Aki K.1986.Temporal change in codaQbefore the Tangshan earthquake of1976and the Haicheng earthquake of1975[J].J Geophys Res,91,665~673
Mogi K.1962.Study of elastic shocks caused by the fracture of heterogeneous materials and its relation to the earthquake phenomena[J].Bull Earthq Res Inst,40(1):125~173
Sato H.1977.Energy propagationincluding scattering effects,single isotropic scattering[J].J phys Earth,25,27~41
Sato H.1984.Attenuation of body waves and envelope formation of three-component seismograms of small earthquakes in randomlyinhomogeneous lithosphere[J].J Geophys Res,89,1221~1241
СодовскийМА.1983.Основныесведенияогрупахпредвестников[J].ΠргнозТемле-трясений,3(3):62~77
高龙生.1985.Q值研究的进展和问题[J].地震地磁观测和研究,6(1):3~6
华正兴,梁静,马云生等.1994.北京1990年大海陀山地震尾波Qc-1随时间变化[J].地震地磁观测与研究,16(2):204~211
陆远忠,陈章立,王碧全等.1985.地震预报的地震学方法[M].北京:地震出版社,112~116
卢振恒,李荣安,全蓥道等.1990.80年代日本地震预报研究进展[M].北京:海洋出版社,159~164
万波.2002.岫岩-海城5.6级地震的地震地质背景及其发震构造[J].东北地震研究,16(2):25~32
王海涛,敖雪明,杨马陵等.1992.单台地震预报的地震学方法[M].北京:地震出版社,47~49
薛丁,阎海滨,曹井泉.2002.1996年5月3日内蒙古自治区包头西6.4级地震[M].见:中国震例,北京:地震出版社,371~389
姚立,虞雪君,陈乃其.1996.鄞县ML3.9和4.7地震的震源参数[J].地震学刊,(3):1~5
姚立,虞雪君,汪进等.1993.民乐盆地及其周围地区的Q值研究[J].地震学报,15(3):296~302
中国地震局监测预报司.1999.一九九八年张北地震[M].北京:地震出版社,1~4
Aki K.1969.Analysis of seismic coda of local earthquakes as scattered waves[J].J Geophys Res,74(2):615~631
Aki K,Chouet B.1975.Origin of coda waves:source,attenuation,and scattering effects[J].J Geophys Res,80(23):3322~3342
Aki K.1980b.Scatting and attenuation of shear waves in the lithosphere[J].J Geophys Res,85,6496~6504
Gusev A A.1997.Temporal variations of the coda decay rate on Kamchatka:Are they real and precursory[J].J Geophys Res,102(B4):8381~8396
Jin Anshu and Aki K.1986.Temporal change in codaQbefore the Tangshan earthquake of1976and the Haicheng earthquake of1975[J].J Geophys Res,91,665~673
Mogi K.1962.Study of elastic shocks caused by the fracture of heterogeneous materials and its relation to the earthquake phenomena[J].Bull Earthq Res Inst,40(1):125~173
Sato H.1977.Energy propagationincluding scattering effects,single isotropic scattering[J].J phys Earth,25,27~41
Sato H.1984.Attenuation of body waves and envelope formation of three-component seismograms of small earthquakes in randomlyinhomogeneous lithosphere[J].J Geophys Res,89,1221~1241
СодовскийМА.1983.Основныесведенияогрупахпредвестников[J].ΠргнозТемле-трясений,3(3):62~77
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