四分量式钻孔应变观测资料的处理与分析
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摘要
利用中国地震数字观测网络"十五"计划期间布设的姑咱、小庙台分量钻孔应变观测结果,根据应变固体潮汐观测模型拟合潮汐响应参量耦合系数、相位滞后;利用考虑响应率、相位滞后、气压扰动影响的综合观测模型提取固体潮频段以内的变化,从构造和介质特性的角度对计算结果的时间序列和平面应变图像进行讨论。结果显示,汶川8.0、会理6.1、姚安6.0级地震前,潮汐响应参数和高频信息在震前几个月至1年出现扰动;姑咱台的应变花图像相对稳定,其变形主要受附近的构造所控制。
On the basis of the borehole strain observations at Guza and Xiaomiao stations in the National Digital Seismological Observational Networks,the coupling coefficients and phase lag of tidal response are fitted by using solid tidal strain model.With comprehensive observation model which contains tidal response rate and phase lag and effects of air pressure disturbance,the changes within the tidal band are analyzed.The spatial and temporal changes are discussed from characteristics of geological structure and medium.The results show that anomalies of tidal response parameters and high frequency disturbance had been observed from several months to a year before Wenchuan %M%s8.0,Huili %M%s6.1 and Yaoan %M%s6.0 earthquakes.The strain rosette at Guza station is stable relatively,the deformation is mostly dominated by geological structure.
On the basis of the borehole strain observations at Guza and Xiaomiao stations in the National Digital Seismological Observational Networks,the coupling coefficients and phase lag of tidal response are fitted by using solid tidal strain model.With comprehensive observation model which contains tidal response rate and phase lag and effects of air pressure disturbance,the changes within the tidal band are analyzed.The spatial and temporal changes are discussed from characteristics of geological structure and medium.The results show that anomalies of tidal response parameters and high frequency disturbance had been observed from several months to a year before Wenchuan %M%s8.0,Huili %M%s6.1 and Yaoan %M%s6.0 earthquakes.The strain rosette at Guza station is stable relatively,the deformation is mostly dominated by geological structure.
引文
1池顺良,等.从5.12汶川地震前后分量应变仪观测到的应变异常看建设密集应变观测网络的必要性[J].国际地震动态,2009,(1):1-13.(Chi Shunliang,et al.The ne-cessity of building national strain-observation network fromthe strain abnormality before Wenchuan earthquake[J].Re-cent Developments in World Seismology,2009,(1):1-13)
2池顺良,武红岭,骆鸣津.钻孔应变观测中潮汐因子离散性与各向异性原因探讨——“十五”数字地震观测网络分量钻孔应变仪首批观测资料分析解释[J].地球物理学进展,2007,22(6):1 746-1 753.(Chi Shunliang,WuHongling and Luo Mingjin.Discussion on strain tidal factorseparation and anisotropy——Analysis of first data of bore-hole component strain-meter of China’s Digital SeismologicalObservational Networks[J].Progress In Geophysics,2007,22(6):1 746-1 753)
3邱泽华,周龙寿,池顺良.用超限率分析法研究汶川地震的前兆应变变化[J].大地测量与地球动力学,2009,(4):1-9.(Qiu Zehua,Zhou Longshou and Chi Shunlia-ng.Study on precursory strain changes of Wenchuan earth-quake with ORAmethod[J].Journal of Geodesy and Geody-namics,2009,(4):1-9)
4邱泽华,等.钻孔差应变仪观测的苏门答腊大地震激发的地球环型自由振荡[J].地球物理学报,2007,50(3):797-805.(Qiu Zehua,et al.Earth’s free torsional oscillationsof the great Sumatra earthquake observed with borehole shearstrainmeter[J].Chinese J.Geophys,2007,50(3):797-805)
5周龙寿,邱泽华,唐磊.地壳应变场对气压短周期变化的响应[J].地球物理学进展,2008,23(6):1 717-1 726.(Zhou Longshou,Qiu Zehua and Tang Lei.The response ofcrustal strain field to short-period Atmospheric pressure vari-ation[J].Progress in Geophysics,2008,23(6):1 717-1 726)
6郗钦文,杨林章,黎凯武.地球对引潮力的响应及综合分析[J].中国地震,1994,9(增刊):83-89.(Xi Qin-wen,Yang Linzhang and Li Kaiwu.Earth’s response to tid-al generating force and its synthetic analysis[J].Earth-quake Research in China.1994,9(Supp.):83-89)
7唐九安,常千军.甘肃省东部地区的潮汐测量结果及其地球动力学意义[J].地震,1995,(3):252-259.(TangJiuan and Chang Qianjun.The eastern part of Gansu prov-ince and tectonic significance of tidal measurements[J].Earthquake,1995,(3):252-259)
8尹祥础,陈学忠,宋治平.加卸载响应比理论及其在地震预测中的应用研究进展[J].地球物理学报,1994,37(增刊):223-230.(Yin Xiangchu,Yin Xunfei and Yu Hua-izhong.The development of load-unload response ratio the-ory and its application to earthquake prediction[J].ChineseJ.Geophys,1994,37(Supp):223-230)
9张晶,张立.中强震前形变固体潮汐资料短期信息的提取[J].地震,2003,23(3):71-78.(Zhang Jing and ZhangLi.Short-term anomaly extracted from tidal deformation databefore strong earthquakes[J].Earthquake,2003,23(3):71-78)
10杨永林,苏琴.鲜水河断裂带现今活动特征研究[J].大地测量与地球动力学,2007,(6):22-27.(YangYonglin and Su Qion.Present activity characteristics ofXianshuihe fault zone[J].Journal of Geodesy and Geody-namics.2007,(6):22-27)
2池顺良,武红岭,骆鸣津.钻孔应变观测中潮汐因子离散性与各向异性原因探讨——“十五”数字地震观测网络分量钻孔应变仪首批观测资料分析解释[J].地球物理学进展,2007,22(6):1 746-1 753.(Chi Shunliang,WuHongling and Luo Mingjin.Discussion on strain tidal factorseparation and anisotropy——Analysis of first data of bore-hole component strain-meter of China’s Digital SeismologicalObservational Networks[J].Progress In Geophysics,2007,22(6):1 746-1 753)
3邱泽华,周龙寿,池顺良.用超限率分析法研究汶川地震的前兆应变变化[J].大地测量与地球动力学,2009,(4):1-9.(Qiu Zehua,Zhou Longshou and Chi Shunlia-ng.Study on precursory strain changes of Wenchuan earth-quake with ORAmethod[J].Journal of Geodesy and Geody-namics,2009,(4):1-9)
4邱泽华,等.钻孔差应变仪观测的苏门答腊大地震激发的地球环型自由振荡[J].地球物理学报,2007,50(3):797-805.(Qiu Zehua,et al.Earth’s free torsional oscillationsof the great Sumatra earthquake observed with borehole shearstrainmeter[J].Chinese J.Geophys,2007,50(3):797-805)
5周龙寿,邱泽华,唐磊.地壳应变场对气压短周期变化的响应[J].地球物理学进展,2008,23(6):1 717-1 726.(Zhou Longshou,Qiu Zehua and Tang Lei.The response ofcrustal strain field to short-period Atmospheric pressure vari-ation[J].Progress in Geophysics,2008,23(6):1 717-1 726)
6郗钦文,杨林章,黎凯武.地球对引潮力的响应及综合分析[J].中国地震,1994,9(增刊):83-89.(Xi Qin-wen,Yang Linzhang and Li Kaiwu.Earth’s response to tid-al generating force and its synthetic analysis[J].Earth-quake Research in China.1994,9(Supp.):83-89)
7唐九安,常千军.甘肃省东部地区的潮汐测量结果及其地球动力学意义[J].地震,1995,(3):252-259.(TangJiuan and Chang Qianjun.The eastern part of Gansu prov-ince and tectonic significance of tidal measurements[J].Earthquake,1995,(3):252-259)
8尹祥础,陈学忠,宋治平.加卸载响应比理论及其在地震预测中的应用研究进展[J].地球物理学报,1994,37(增刊):223-230.(Yin Xiangchu,Yin Xunfei and Yu Hua-izhong.The development of load-unload response ratio the-ory and its application to earthquake prediction[J].ChineseJ.Geophys,1994,37(Supp):223-230)
9张晶,张立.中强震前形变固体潮汐资料短期信息的提取[J].地震,2003,23(3):71-78.(Zhang Jing and ZhangLi.Short-term anomaly extracted from tidal deformation databefore strong earthquakes[J].Earthquake,2003,23(3):71-78)
10杨永林,苏琴.鲜水河断裂带现今活动特征研究[J].大地测量与地球动力学,2007,(6):22-27.(YangYonglin and Su Qion.Present activity characteristics ofXianshuihe fault zone[J].Journal of Geodesy and Geody-namics.2007,(6):22-27)
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