中国地震台网初至P波区域三维走时表的建立
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摘要
基于LLNL-G3Dv3全球P波三维速度模型,应用FMM软件包计算并建立了中国地震台网990个台站的初至P波区域三维走时表.该走时表覆盖了以台站为中心的水平向20°×20°、垂直向-5.1—80 km(向下为正)的三维空间.其水平向间隔为0.2°,垂直向间隔为5 km.这样对于任一深度小于80 km的震源,均可以应用此三维走时表计算其到周围10°范围内台站的走时.中国地震台网初至P波区域三维走时表的建立,对于改善区域初至P波走时预测,提高地震定位精度有一定现实意义.
Based on the global-scale three-dimensional P wave velocity model LLNL-G3Dv3,regional travel-time table of first P arrivals of 990 seismic stations of China Seismograph Network is calculated and constructed by using FMM software package.The table covers the station-centered area with 20°multiply 20° in horizontal direction and —5.1 km to 80 km in vertical direction.The horizontal interval of travel-time table is 0.2° and the depth interval is 5km.Accordingly,travel-times can be calculated within the distance of 10° for any source with depth less than 80 km.As a consequence of the construction of the regional three-dimensional first P arrival travel-time table,the prediction of first P arrival time would be much more improved,and it is significant for improving earthquake locations.
引文
韩雪君.2011.三维复杂介质中实时定位方法的初步研究[D].北京:中国地震局地球物理研究所:25-28.Han X J.2011.Preliminary Study of Real-Time Evolutionary Location Method in 3D Complicated Medium[D].Beijing:Institute of Geophysics,China Earthquake Administration:25-28(in Chinese).
    王椿镛,Mooney W D,王溪莉,吴建平,楼海,王飞.2002.川滇地区地壳上地幔三维速度结构研究[J].地震学报,24(1):1-16.Wang C Y,Mooney W D,Wang X L,Wu J P,Lou H,Wang F.2002.Study on 3-D velocity structure of crust and upper mantle in Sichuan-Yunnan region,China[J].Acta Seismologica Sinica,24(1):1-16(in Chinese).
    吴建平,黄媛,张天中,明跃红。房立华.2009.汶川M_s8.0级地震余震分布及周边区域P波三维速度结构研究[J].地球物理学报,52(2):320-328.Wu J P,Huang Y,Zhang TZ,Ming Y H,Fang L H.2009.Aftershock distribution of the M_s8.0 Wenchuan earthquake and three dimensional P-wave velocity structure in and around source region[J].Chinese Journal of Geophysics,52(2):320-328(in Chinese).
    于湘伟,陈运泰,张怀.2010.京津唐地区地壳三维P波速度结构与地震活动性分析[J].地球物理学报,53(8):1817-1828.doi:10.3969/j.issn.0001-5733.2010.08.007.Yu X W,Chen Y T,Zhang H.2010.Three-dimensional crustal P-wave velocity structure and seismicity analysis in Beijing-Tianjin-Tangshan region[J].Chinese Journal of Geophysics,53(8):1817-1828.doi:10.3969/j.issn.0001-5733.2010.08.007(in Chinese).
    张风雪,吴庆举,李永华,张瑞青,潘佳铁.2010.FMM射线追踪方法在地震学正演和反演中的应用[J].地球物理学进展,25(4):1197-1205.Zhang F X,Wu Q J,Li Y H,Zhang R Q,Pan J T.2010.Application of FMM ray tracing to forward and inverse problems of seismology[J].Progress in Geophysics,25(4):1197-1205(in Chinese).
    赵志新,徐纪人.2009.广角反射地震探测得到的中国东部地壳三维P波速度结构[J].科学通报,54(7):931-937.Zhao Z X,Xu J R.2009.Three-dimensional crustal velocity structure of P-wave in East China from wide-angle reflection and refraction surveys[J].Chinese Science Bulletin,54(8):1389-1397.doi:10.1007/s11434-009-0022-9.
    朱介寿,曹家敏,蔡学林,严忠琼.2003.中国及邻近陆域海域地球内部三维结构及动力学研究[J].地球科学进展。18(4):497-503.Zhu J S.Cao J M,Cai X L,Yan Z Q.2003.Study for three-dimensional structure of Earth interior and geodynamics in China and adjacent land and sea regions[J].Advances in Earth Science,18(4):497-503(in Chinese).
    朱介寿,蔡学林,曹家敏,严忠琼.2006.中国及相邻区域岩石圈结构及动力学意义[J].中国地质,33(4):793-803.Zhu J S,Cai X L,Cao J M,Yan Z Q.2006.Lithospheric structure and geodynamics in China and its adjacent areas[J].Geology in China,33(4):793-803(in Chinese).
    Crotwell H P,Owens T J,Ritsema J.1999.The TauP ToolKit:Flexible seismic travel-time and ray-path utilities[J].Seism Res Lett,70(2):154-160.
    de Kool M D,Rawlinson N,Sambridge M.2006.A practical grid-based method for tracking multiple refraction and reflection phases in three-dimensional heterogeneous media[J].Geophys J Int,167(1):253-270.
    Dziewonski A M,Anderson D L.1981.Preliminary reference Earth model[J].Phys Earth Planet Int,25(4):297-356.
    Flanagan M P,Myers S C,Kopper K D.2007.Regional travel-time uncertainty and seismic location improvement using a three-dimensional a priori velocity model[J].Bull Seismol Sue Am,97(3):804-825.
    Huang J L.Zhao D P.2004.Crustal heterogeneity and seismotectonics of the region around Beijing.China[J].Tectonophysics,385(1/2/3/4):159-180.
    Mooney W D,Laske M G,Masters T G.1998.CRUST 5.1:A global crustal model at 5°×5°degrees[J].J Geophys Res,103(B1):727-747..Murphy J R,Rodi W,Johnson M,Sultanov D D,Bennett T J,Toksoz M N,Ovtchinnikov V,Barker B W,Retier D T,Rosca A C,Shchukin Y.2005.Calibration of International Monitoring System(IMS)stations in central and eastern Asia for improved seismic event location[J].Bull Seismol Sac Am,95(4):1535-1560.
    Myers S C,Schuhz C A.2000.Improving sparse network seismic location with Bayesian Kriging and teleseismically constrained calibration events[J].Bull Seismol Soc Am,90(1):199-211.
    Nicholson T,Sambridge M,Gudmundsson O.2004.Three-dimensional empirical traveltimes:Construction and applications[J].Geophys J Int,156(2):307-328.
    Nicholson T,Clarke D,Townend J.2008.Regional earthquake location using empirical traveltimes in a region of strong lateral velocity heterogeneity[J].Geophys J Int,175(2):560-570.
    Popovici A M,Sethian J A.2002.3-D imaging using higher order fast marching traveltimes[J].Geophysics,67(2):604-609.
    Rawlinson N,Sambridge M.2004a.Wave front evolution in strongly heterogeneous layered media using the fast marching met hod[J].Geophys J Int,156(3):631-647.
    Rawlinson N,Sambridge M.2004b.Multiple reflection and transmission phases in complex layered media using a multistage fast marching method[J].Geophysics,69(5).1338-1350.
    Ritzwoller M H,Shapiro N M,Levshin A L,Bergman E A,Engdahl E R.2003.Ability of a global three-dimensional model to locate regional events[J].J Geophys Res,108(B7):2353.doi:10.1029/2002JB002167.
    Sethian J A,Popovici A M.1999.3-D traveltime computation using the fast marching method[J].Geophysics,64(2):516-523.
    Simmons N A,Myers S C,Johannesson G.2011.Global-scale P wave tomography optimized for prediction of teleseismic and regional travel times for Middle East events:2.Tomographic inversion[J].J Geophys Res,116:B04305.doi:10.1029/2010JB007969.
    Simmons N A,Myers S C,Johannesson G,Matzel E.2012.LLNL-G3Dv3:Global P wave tomography model for improved regional and teleseismic travel time prediction[J].J Geophys Res,117:B10302.doi:10.1029/2012JB009525.
    Wessel P.Smith W H F,Scharroo R,Luis J F.Wobbe F.2013.Generic Mapping Tools:Improved version released[J].EOSTrans AGU,94:409-410.
    Yang X I.Bonddr I,Bhattacharyya J.Ritzwoller M,Shapiro N.Antolik M,Ekstrom G,Israelsson H,McLaughlin K.2004.Validation of regional and teleseismic travel-time models by relocating ground-truth events[J].Bull Seismol Soc Am,94(3):897-919.

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