鹤岗地震台垂直摆倾斜仪记录同震响应
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摘要
对2011—2015年鹤岗地震台垂直摆倾斜仪记录的同震响应数据进行整理,垂直摆同震响应与震中距成线性关系;近距离地震(约Δ>10°)同震响应以阶跃为主,阶跃大小、方向与地震实际倾斜量存在差异;远震同震响应的振幅与震级呈指数函数关系,振幅与震中距成幂函数关系。分析认为,同震响应(阶跃)不仅与震中距、震级因素有关,还与场地效应和传播路径关系密切。
Through the processing of co-seismic response data recorded by the vertical pendulum tiltmeter of Hegang seismic station from 2011 to 2015, it isfound that there is a linear relationship between the co-seismic response ability and the epicentral distance.For nearearthquakes(about Δ > 10 °) the coseismic response is given priority with step, and the direction and size of the step is different from the actual tilt of the earthquake.For teleseism, an exponential function relationship between amplitude and magnitude,and a power function relationship between the amplitude and the epicentraldistance are found.The conclusion is that the same seismic response(step) is not only related to the epicenter distance, magnitude and other factors, but also closely to the site effect and the propagating path.
Through the processing of co-seismic response data recorded by the vertical pendulum tiltmeter of Hegang seismic station from 2011 to 2015, it isfound that there is a linear relationship between the co-seismic response ability and the epicentral distance.For nearearthquakes(about Δ > 10 °) the coseismic response is given priority with step, and the direction and size of the step is different from the actual tilt of the earthquake.For teleseism, an exponential function relationship between amplitude and magnitude,and a power function relationship between the amplitude and the epicentraldistance are found.The conclusion is that the same seismic response(step) is not only related to the epicenter distance, magnitude and other factors, but also closely to the site effect and the propagating path.
引文
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郭国祥,张红秀,郭林旺,等.临汾地震台垂直摆倾斜观测常见异常图像分析[J].地震地磁观测与研究,2013,34(3):162-165.
李英康,高锐,姚聿涛,等.大兴安岭造山带及两侧盆地的地壳速度结构[J].地球物理学进展,2014,29(1):73-83.
刘殿秘,韩立国,翁爱华,等.松辽盆地西北边界部分地球物理特征[J].地球物理学进展,2007,22(6):1 722-1 727.
刘琦,张晶,晏锐,等.高采样率四分量钻孔应变同震响应分析[J].中国地震,2013,29(1):57-67.
吕品姬,陈志遥,赵斌,等.定点倾斜观测映震能力综述[J].大地测量与地球动力学,2010,30(Z2):50-56.
牛安福,张晶,吉平.强地震引起的同震形变响应[J].内陆地震,2005,19(1):1-76.
潘佳铁,李永华,吴庆举,等.中国东北地区地壳上地幔三维S波速度结构[J].地球物理学报,2014,57(7):20 778-20 875.
彭华,马秀敏,姜景捷.山丹地应力监测站体应变仪的地震效应[J].地质力学学报,2008,14(2):97-108.
吴微微,杨建思,苏金蓉,等.2013年吉林前郭-乾安震源区中强地震矩张量反演与区域孕震环境研究[J].地球物理学报,2014,57(8):2 541-2 554.
肖峻,莫易敏,胡国庆.基于固体潮观测的高精度垂直摆倾斜仪[J].武汉大学学报(信息科学版),2004,29(11):973-976.
薛生瑞,高翠珍,王晓霞,等.山西离石中心地震台水管仪与水平摆倾斜仪同震响应对比分析[J].山西地震,2014,(3):17-20.
杨跃文,刘冰冰,秦嘉政,等.丽江台水管仪频谱分析及同震震后效应研究[J].防灾减灾学报,2010,26(1):61-65.
张广成.用接收函数方法研究中国东北地区地壳上地幔结构[D].北京:中国地震局地球物理研究所,2012:1-120.
张凌空,牛安福.中国钻孔体应变仪同震变化观测结果[J].国际地震动态,2008,(11):120.
张凌空,牛安福.Sacks体应变地震波的观测结果分析[J].大地测量与地球动力学,2009,29(5):33-37.
赵斌,吕品姬,陈志遥,等.汶川MS 8.0地震同震倾斜应变变化分析[J].大地测量与地球动力学,2010,30(3):17-216.
Wang R J,Lorenzo-Martin F,Roth F.PSGRN/PSCMP-a new code for calculating co-and post-seismic deformation,geoid and gravity changes based on the viscoelastic-gravitational dislocation theory[J].Computers&Geosciences,2006,32(4):527-541.