唐山地区慢剪切波的时间延迟:强地面运动台阵资料分析
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摘要
利用唐山地区强地面运动台阵资料 ,根据剪切波分裂的 CDP分析方法 ,对唐山地区剪切波分裂时间延迟参数进行了讨论。通过选取具有相同射线方向的波形记录的剪切波分裂分析 ,得到较大地震 (ML 5.2 )之前的时间延迟值高于震后的时间延迟值。特别是 ,文章提出的研究剪切波分裂时间延迟的时间变化的思路 ,是实际分析中需要加以注意的。文章认为 ,利用剪切波分裂进行较大地震的监控和预测 ,具有重要的意义
Using the data of the strong ground motion array in Tangshan region,i.e.SGAT and the CDP analysis method,this paper discusses the time delay parameters of shear wave splitting in Tangshan region.The results suggest that time delay values before a relative large earthquake( M L 5 2)are higher than those after the earthquake for the recordings of same ray direction.Although limited data,this paper suggests that it is very important to use the shear wave splitting method to monitor the relative large coming earthquake.
Using the data of the strong ground motion array in Tangshan region,i.e.SGAT and the CDP analysis method,this paper discusses the time delay parameters of shear wave splitting in Tangshan region.The results suggest that time delay values before a relative large earthquake( M L 5 2)are higher than those after the earthquake for the recordings of same ray direction.Although limited data,this paper suggests that it is very important to use the shear wave splitting method to monitor the relative large coming earthquake.
引文
高原 ,郑斯华 . 1 994.唐山地区剪切波分裂研究 ( )—相关函数分析法 .中国地震 ,1 0 (增刊 ) :1 1～ 2 1
高原 ,郑斯华 ,孙勇 . 1 995.唐山地区地壳裂隙各向异性 .地震学报 ,1 7(3) :2 83～ 2 93
高原 ,郑斯华 ,周蕙兰 . 1 999a.唐山地区快剪切波偏振图像及其变化 .地球物理学报 ,42 (2 ) :2 2 8～ 2 32
高原 ,李世愚 ,周蕙兰 ,刘晓红 ,刘绮亮 . 1 999b.大理岩的剪切波分裂对差应力变化响应的实验研究 .地球物理学报 ,42 (6) :778～ 784
孙勇 ,郑斯华 . 1 993.唐山地区剪切波分裂研究 .中国地震 ,9(1 ) :60～ 67
Crampin S.1 998.Stress- forecasting:a viable alternative to earthquake prediction in a dynamic Earth.TransR Soc.Edin.,Earth Sci,89:1 2 1～ 1 2 3
Crampin S.Evans R.&Atkinson. 1 984.B K,Earthquake prediction:a new physical basis,Geophys JR astr Soc,76:1 47～ 1 56
Crampin S. &Zatsepin S V. 1 997a.Modelling the compliance of crustal rock- .Response to temporalchanges before earthquakes. Geophs JInt,1 2 9:495～ 50 6
Crampin S.&Zatsepin,SV. 1 997b.Change of strain before earthquakes:the possibility of routine morni-toring of both long- term and short- term precursors. JPhys Earth,45:41～ 66
Crampin S,Volti T.&Stefansson R.1 999.A successfully stress- forecastearthquake.Geophys JInt,1 38:F1～F5
Gao Y,Wang P D,Zheng S H,Wang M,Chen Y T &Zhou H L. 1 998.Temporal changes in shear- wavesplitting at an isolated swarm of small earthquakes in1 992 near Dongfang,Hainan Island,SouthernChina. Geophys JInt,1 35:1 0 2～ 1 1 2
高原 ,郑斯华 ,孙勇 . 1 995.唐山地区地壳裂隙各向异性 .地震学报 ,1 7(3) :2 83～ 2 93
高原 ,郑斯华 ,周蕙兰 . 1 999a.唐山地区快剪切波偏振图像及其变化 .地球物理学报 ,42 (2 ) :2 2 8～ 2 32
高原 ,李世愚 ,周蕙兰 ,刘晓红 ,刘绮亮 . 1 999b.大理岩的剪切波分裂对差应力变化响应的实验研究 .地球物理学报 ,42 (6) :778～ 784
孙勇 ,郑斯华 . 1 993.唐山地区剪切波分裂研究 .中国地震 ,9(1 ) :60～ 67
Crampin S.1 998.Stress- forecasting:a viable alternative to earthquake prediction in a dynamic Earth.TransR Soc.Edin.,Earth Sci,89:1 2 1～ 1 2 3
Crampin S.Evans R.&Atkinson. 1 984.B K,Earthquake prediction:a new physical basis,Geophys JR astr Soc,76:1 47～ 1 56
Crampin S. &Zatsepin S V. 1 997a.Modelling the compliance of crustal rock- .Response to temporalchanges before earthquakes. Geophs JInt,1 2 9:495～ 50 6
Crampin S.&Zatsepin,SV. 1 997b.Change of strain before earthquakes:the possibility of routine morni-toring of both long- term and short- term precursors. JPhys Earth,45:41～ 66
Crampin S,Volti T.&Stefansson R.1 999.A successfully stress- forecastearthquake.Geophys JInt,1 38:F1～F5
Gao Y,Wang P D,Zheng S H,Wang M,Chen Y T &Zhou H L. 1 998.Temporal changes in shear- wavesplitting at an isolated swarm of small earthquakes in1 992 near Dongfang,Hainan Island,SouthernChina. Geophys JInt,1 35:1 0 2～ 1 1 2
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