高采样率四分量钻孔应变同震响应分析
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摘要
针对2012年4月11日苏门答腊北部附近海域8.6级地震,选取了2套10Hz采样YRY型四分量钻孔应变仪、1套100Hz采样FBS-3B型宽频带地震计的观测结果,在预处理后对比分析了上述观测结果在同震时段的响应特征。利用S变换方法研究了整个同震时段的频谱动态演化过程,并对各震相时段的频谱细节进行了分析。同站点地震仪与钻孔应变仪S变换结果表明,二者的同震频谱演化过程具有较好的一致性,可以相互参照进行波动信号的甄别,说明钻孔应变仪在高频端的监测结果是可靠的。
In this paper, we adopt two sets of 10 Hz YRY 4-component borehole strainmeters and one set of 100 Hz FBS-3B broadband seismometer to study the 11 April 2012 MW8.6 earthquake off the west coast of northern Sumatra, and compare the response characteristics during the coseismic stage after preprocessing the data. We study the spectrum's dynamic process during the coseismic stage with the S transformation method, and analyze on the spectrum's details of different seismic phases. The S transformation results of collocated seismometer and borehole strainmeter show that the two coseismic spectrum evolutions have much in common and can help each other to identify the wave signals, so it's reliable to observe the data at high frequency using the borehole strainmeters.
引文
①http://www.unavco.ucar.edu/community/publications/proposals/PBOwhitepaper.pdf
    ②池顺良,2012,私人通讯
    ③http://neic.usgs.gov/neis/travel times/compute tt.html
    郭燕平、邱泽华、李素华等,2012,钻孔体应变高采样率观测实验,大地测量与地球动力学,32(1),51~55。
    廖丽霞、陈昌泳、倪晓寅等,2009,不同型号仪器水位记震能力对比分析,地震研究,32(2),137~144。
    刘琦、张晶,2011,S变换在汶川地震前后应变变化分析中的应用,大地测量与地球动力学,31(4),6~9。
    刘启元、陈久辉、李顺成等,2008,汶川MS8.0地震:川西流动地震台阵观测数据的初步分析,地震地质,30(3),584~596。
    孟国杰、任金卫、金红林等,2007,GPS高频数据处理方法及其在地震学中的应用研究进展,国际地震动态,(7),26~31。
    邱泽华、石耀霖、欧阳祖熙,2005,四分量钻孔应变观测的实地相对标定,大地测量与地球动力学,25(1),118~122。
    邱泽华、唐磊、张宝红等,2012,用小波-超限率分析提取宁陕台汶川地震体应变异常,地球物理学报,55(2),538~546。
    邱泽华、张宝红、池顺良等,2010,汶川地震前姑咱台观测的异常应变变化,中国科学:地球科学,40(8),1031~1039。
    舒优良、张世民,2003,周至深井水震波数字化记录与地震波记录的对比研究,地震地磁观测与研究,24(5),26~31。
    唐磊、邱泽华、宋茉,2010,钻孔四分量应变观测自检内精度分析,大地测量与地球动力学,30(增刊Ⅱ),36~39。
    杨选辉、杨树新、张彬等,2011,测震数采仪记录的钻孔应变,中国地震,27(1),65~71。
    殷海涛、张培震、甘卫军等,2010,高频GPS测定的汶川MS8.0级地震震时近场地表变形过程,科学通报,55(2),2621~2626。
    Collins J A,Wolfe C J,Laske G,2012,Shear wave splitting at the Hawaiian hot spot from the PLUME land and ocean bottomseismometer deployments,Geochem Geophys Geosyst,13,Q02007.
    Ji C,Larson K M,Tan Y,et al,2004,Slip history of the2003San Simeon earthquake constrained by combining1-Hz GPS,strong motion,and teleseismic data,Geophys Res Lett,31,L17608.
    Kitagawa Y,Itaba S,Matsumoto N,et al,2011,Frequency characteristics of the response of water pressure in a closed well tovolumetric strain in the high-frequency domain,J Geophys Res,116,B08301.
    Larson K,Bodin P,Gomberg J,2003,Using1-Hz GPS data to measure deformations caused by the Denali fault earthquake,Science,300,1421~1424.
    Shelly D R,Ellsworth W L,Ryberg T,et al,2009,Precise location of San Andreas Fault tremors near Cholame,California usingseismometer clusters:Slip on the deep extension of the fault?Geophys Res Lett,36,L01303.
    Stockwell R G,Mansinha L,Lowe R P,1996,Localization of the complex spectrum:the S transform,IEEE Trans,On SignalProcessing,44(4),998~1001.
    Yokota Y,Keketsu K,Hikima K,et al,2009,Ability of1-Hz GPS data to infer the source process of a mediun-sized earthquake:The case of the2008Iwate-Miyagi Nairiku,Japan,earthquake,Geophys Res Lett,36,L12301.

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