兴海6.6级地震前地震活动的演化过程及地下流体异常的分析
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摘要
应用“全时空、有限时空扫描及时空强三维轴向稳定性检验”等“九五”研究最新技术途径 ,深入分析和研究了兴海 6 6级地震前 ,2年时间尺度内小震活动的发展及强震的孕育过程 ,并提取了较为稳定、清晰的小震活动演化图像。其演化过程为 :中短期空区( 2年尺度 )→短期空区 ( 1年尺度 )→中小震条块 ( 1～ 0 5年尺度 )→显著地震事件 ( 1～ 0 5年尺度 )→逼近地震 (≤ 0 3个月 )→主震发生。同时 ,对青海省东北部出现的大面积地下流体异常也进行了系统地分析
WT5BZ]By applying the newest technical method of “scanning of large-scale and limited temperal-spatial.three-dimensional axial stability test of time-space-magnitude”in“the ninth five-year period”,the authors have analysed the small earthquake activity and strong earthquake preparation in the scale of two years before Xinghai earthquake with M s 6 6,and got more stable and clear evolutionary maps of small earthquake activity.The evolutionary process is:Middle-short term gap(in two-year scale)→short term gap(in one-year scale)→middle-small earthquake belts(in 1～0 5 year scale)→large earthquake event (in 1～0 5 year scale)→approach earthquake(≤0 3 months)→main shork.Meanwhile,they have analysed systematically the subsurface fluid in north-eastern area in Qinghai province. [WT5HZ]
WT5BZ]By applying the newest technical method of “scanning of large-scale and limited temperal-spatial.three-dimensional axial stability test of time-space-magnitude”in“the ninth five-year period”,the authors have analysed the small earthquake activity and strong earthquake preparation in the scale of two years before Xinghai earthquake with M s 6 6,and got more stable and clear evolutionary maps of small earthquake activity.The evolutionary process is:Middle-short term gap(in two-year scale)→short term gap(in one-year scale)→middle-small earthquake belts(in 1～0 5 year scale)→large earthquake event (in 1～0 5 year scale)→approach earthquake(≤0 3 months)→main shork.Meanwhile,they have analysed systematically the subsurface fluid in north-eastern area in Qinghai province. [WT5HZ]
引文
孙加林 ,刘蒲雄等 .各类地震活动图缘与地层活动参数为相互关系及中短期预报效能的研究。
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