1998年临猗5.0级地震Q值的时间变化特征
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摘要
利用西安数字地震遥测台网记录的数字地震资料,采用P波初动半周期残差法求得了1998年7月临猗5.0级地震前后不同路径的Q值变化,发现在地震发生前Q在87-203之间,震后Q在67-164之间,震前震中区附近出现了明显的高Q值异常。结果表明,地震前的高Q值异常可以作为地震预测的一种手段。
By using the digital data recorded by xi'an digital telemetry seismic network,the temporal change in coda Q before and after Linyi earthquake with ML5. 0 in July,1998 is determined through the method for half period of the first arrival P wave. It is pointed that the Q value is 87-203 before the earthquake and is 67-164 after the earthquake, and clearly anomaly with high Q value appeared in the nearby areas of the epicenter before the earthquake. The result shows this anomaly with high Q value before an earthquake can be used as a method for earthquake forecast.
By using the digital data recorded by xi'an digital telemetry seismic network,the temporal change in coda Q before and after Linyi earthquake with ML5. 0 in July,1998 is determined through the method for half period of the first arrival P wave. It is pointed that the Q value is 87-203 before the earthquake and is 67-164 after the earthquake, and clearly anomaly with high Q value appeared in the nearby areas of the epicenter before the earthquake. The result shows this anomaly with high Q value before an earthquake can be used as a method for earthquake forecast.
引文
傅昌洪.1989． 介质特征(Q值)的变化与地震预报[M].见地震预报实用化文集(地震学专集),北京:学术书刊出版社,426-438
林邦慧,吴诗芬,高则明.1979． 1977年5月12日宁河地震烈度明显偏低的探讨[J].地球物理学报,22(1) :14-24
刘祖源.1983． 岩石中地震波衰减的实验研究[J].地震科学研究,6,34-40
米秋霞,段锋.1999． 泾阳临猗地震的地下流体异常特征[J].灾害学,14(4) :49-53
王卫东,杜长娥.2003． 渭河断陷盆地及邻近地区的Q值分布与地震灾害关系的初步研究[J].灾害学,18(3) :50-53
徐果明.1985． 岩石的饱和度对地震波衰减的影响[J].地震地磁观测与研究,6(6) :123-127
张国民,傅征祥,桂燮泰等.2001． 地震预报引论[M].北京;地震出版社,44-50
卓钰如,刘连柱,张立明.1985． 不同类型地震发生区域的Q值特征[M].地震,2,44-48
Aki K. 1982． Scattering and attenuation[J]. Bull Seim Soc Amer, 72,319-330
Gladwin M T and Stacey F D. 1974． An elastic degradation of acoustic pulses in rock[J]. Phys Earth Plan鐃 Inter, 8,332-336
Masakazu Ohtake. 1987． Temporal change of Qp-1 in focal area of 1984 western Nagano,Japan earthquake as derived formpulse width analysis[J]. J Geophys Res, 92(86) :4 846-4 852
Winkler K And Nur A. 1982． Seismic attenuation:effects of pore fiuids and frictional sliding[J]. Geophysics, 47,1-15
林邦慧,吴诗芬,高则明.1979． 1977年5月12日宁河地震烈度明显偏低的探讨[J].地球物理学报,22(1) :14-24
刘祖源.1983． 岩石中地震波衰减的实验研究[J].地震科学研究,6,34-40
米秋霞,段锋.1999． 泾阳临猗地震的地下流体异常特征[J].灾害学,14(4) :49-53
王卫东,杜长娥.2003． 渭河断陷盆地及邻近地区的Q值分布与地震灾害关系的初步研究[J].灾害学,18(3) :50-53
徐果明.1985． 岩石的饱和度对地震波衰减的影响[J].地震地磁观测与研究,6(6) :123-127
张国民,傅征祥,桂燮泰等.2001． 地震预报引论[M].北京;地震出版社,44-50
卓钰如,刘连柱,张立明.1985． 不同类型地震发生区域的Q值特征[M].地震,2,44-48
Aki K. 1982． Scattering and attenuation[J]. Bull Seim Soc Amer, 72,319-330
Gladwin M T and Stacey F D. 1974． An elastic degradation of acoustic pulses in rock[J]. Phys Earth Plan鐃 Inter, 8,332-336
Masakazu Ohtake. 1987． Temporal change of Qp-1 in focal area of 1984 western Nagano,Japan earthquake as derived formpulse width analysis[J]. J Geophys Res, 92(86) :4 846-4 852
Winkler K And Nur A. 1982． Seismic attenuation:effects of pore fiuids and frictional sliding[J]. Geophysics, 47,1-15
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