2010年-2017年邢台及周边地区中小地震的精定位研究

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英文篇名：Research of middle-micro earthquake relocation in Xingtai and its surrounding areas from 2010 to 2017 作者：章阳 ; 陈婷 ; 刘立申 ; 王利兵 英文作者：ZHANG Yang;CHEN Ting;LIU Lishen;WANG Libing;Hongshan Benchmark Seismic Station;Earthquake Administration of Hebei Province; 关键词：双差定位 ; 精定位 ; 震源深度 ; 新河断裂 英文关键词：double-difference location;;relocation;;source depth;;Xinhe fault belt 中文刊名：WTHT 英文刊名：Computing Techniques for Geophysical and Geochemical Exploration 机构：红山基准地震台;河北省地震局; 出版日期：2018-11-15 出版单位：物探化探计算技术 年：2018 期：v.40;No.182 基金：2017年河北省地震科技星火重点项目(DZ20170109002) 语种：中文; 页：WTHT201806005 页数：5 CN：06 ISSN：51-1242/P 分类号：32-36

摘要

采用双差定位法,根据邢台及周边地区(36. 3°-38. 5°N,113°-116°E) 2010年1月至2017年6月发生的1 559个ML≥1. 0的地震P波和S波到时资料,进行重定位研究。精定位后,改进了初始定位精度,显示了比较精细的震中分布图像和震源深度剖面图像,获得更加准确的1515个地震事件的震源位置信息。结果显示:研究区域的中小地震主要集中在隆尧地区,而且震中分布集中在新河断裂带上,呈现出明显的条带状分布特征;从地震震源深度分布来看,地震主要集中在6 km～15 km深度范围内,中小震发震层为上地壳;新河断裂带上的小震集中在西南段,且震源深度由西南向东北呈现出逐渐变浅的趋势。
        We used double-difference location method to relocate the earthquake hypocenters in Xingtai and its surrounding areas( 36. 3°-38. 5°N,113°-116°E) based on the P-wave and S-wave data of 1559 earthquakes ML≥1. 0 with occurred from January2010 to June 2017. The initial location accuracy has been improved after relocation,showing the more relatively fine epicenter distribution images and seismic depth profile images. From which we get more accurate information of 1515 earthquakes. The results showed that middle-micro earthquakes are mainly concentrated in Longyao and earthquakes epicenters are concentrated on Xinhe fault with a stripe-like distribution; most of the depth of earthquake source distributed in 6-15 kilometers with the variant depth distribution feature in the upper crust; the earthquake source depth of Xinhe seismic belt showed the trend of gradually becomes shallow from Southwest to Northeast. Most of Middle-micro earthquakes focus on Southwest.

引文

[1]朱元清,赵仲和.提高地震定位精度新方法的研究[J].地震地磁观测与研究,1997,(05):64-72.ZHU Y Q,ZHAO Z H.Research on the new method to raise earthquake location accuracy[J].Seismological and Geomagnetic Observation and Research,1997,(05):64-72.(In Chinese)
    [2]WALDHAUSER F,Ell SWORTH W L.A double-difference earthquake location algorithm:method and application to the northern Hayward Fault.California[J].Bull.Seism.Soc.Am.,2000,90:1353-1368.
    [3]WALDHAUSER F,RiCHARDS P G.Reference E-vents for Regional Seismic Phases at IMS Station in China[J].Bull.Seism.Soc.Am.,2004,94:2265-2279.
    [4]WALDHAUSER F,SCHAFF D,RICHARDS P G,et al.Lop Nor revisited:nuclear explosion location,1976-1996,from double difference analysis of regional and teleseismic data[J].Bull.Seism.Soc.Am.,2004,94:1879-1889.
    [5]BOGDAN E,JAMES M,SHIRO O.Double-difference relocation of the 2004 earthquake off-shore of the Kii peninsula[J].Earth,Planets and Space,2005,57:357-362.
    [6]Z.X.YANG,WALDHAUSER F,Y.T.Chen&Richards PG.Double-difference relocation of earthquake in central-western China,1992-1999[J].Journal of Seismology,2005,9:241-264.
    [7]黄媛,吴建平,张天中,等.汶川8.0级大地震及其余震序列重定位研究[J].中国科学(D辑:地球科学),2008(10):1242-1249.HUANG Y,WU J P,ZHANG T Z,et al.Relocation of the Wenchuan 8.0 earthquake and Its aftershock sequence[J].Scientia Sinica(Terrae),2008(10):1242-1249.(In Chinese)
    [8]张小涛,吕坚,马广庆,等.双差地震定位法在邯郸-邢台地区地震精确定位中的初步应用[J].地震研究,2008(01):37-41.ZHANG X T,LV J,MA G Q,et al.The preliminary application of dual-difference earthquake location method in precise location in Handan-Xingtai region[J].Journal of Seismological Research,2008(01):37-41.(In Chinese)
    [9]张素欣,王晓山,王想,等.2010年3月6日唐山滦县M_L4.7地震序列分析[J].华北地震科学,2010(03):6-9.ZHANG S X,WANG X S,WANG X,et al.Analysis on earthquake sequence of Luanxian M_L4.7 on March 6,2010[J].North China Earthquake Sciences,2010(03):6-9.(In Chinese)
    [10]莘海亮,方盛明,李稳.豫北及邻区地震双差法重新定位研究[J].大地测量与地球动力学,2011,31(06):63-68.XIN H L,FANG S M,LI W.Relocation of earthquakes of Yubei area and adjacent region with double difference location algorithm[J].Journal of Geodesy and Geodynamics,2011,31(06):63-68.(In Chinese)
    [11]王未来,吴建平,房立华,等.2010年玉树M_S7.1地震及其余震的双差定位研究[J].中国科学:地球科学,2012(07):1037-1046.WANG W L,WU J P,FANG L H,et al.Double difference relocation of the 2010 M_S 7.1 earthquake and its aftershock sequence in Yushu[J].Scientia Sinica(Terrae),2012(07):1037-1046.(In Chinese)
    [12]房立华,吴建平,王未来,等.四川芦山Ms7.0级地震及其余震序列重定位[J].科学通报,2013(20):1901-1909.FANG L H,WU J P,WANG W L,et al.Relocation of the Ms 7.0 earthquake and its aftershock sequence[J].Chinese Science Bulletin,2013(20):1901-1909.(In Chinese)
    [13]房立华,吴建平,王长在,等.2012年新疆新源M_s6.6地震余震序列精定位研究[J].中国科学:地球科学,2013(12):1929-1933.FANG L H,WU J P,WANG C Z,et al.Relocation of the2014 Ms 6.6 earthquake aftershock sequence in Xinyuan,Xinjiang[J].Scientia Sinica(Terrae),2013(12):1929-1933.(In Chinese)
    [14]房立华,吴建平,王未来,等.2014年新疆于田MS7.3级地震序列重定位[J].地球物理学报,2015(03):802-808.FANG L H,WU J P,WANG W L,et al.Relocation of the2014 MS 7.3 earthquake sequence in Yutian,Xinjiang[J].Chinese Journal of Geophysics,2015(03):802-808.(In Chinese)
    [15]赵博,高原,黄志斌,等.四川芦山M_S7.0地震余震序列双差定位、震源机制及应力场反演[J].地球物理学报,2013(10):3385-3395.ZHAO B,GAO Y,HUANG Z B,et al.Double difference relocation,focal mechanism and stress inversion of Lushan MS 7.0 earthquake sequence[J].Chinese Journal of Geophysics,2013(10):3385-3395.(In Chinese)
    [16]张广伟,雷建设,孙长青.2014年2月12日新疆于田M_S7.3级地震主震及余震序列重定位研究[J].地球物理学报,2014(03):1012-1020.ZHANG G W,LEI J S,SUN C Q.Relocation of the 12February 2014 Yutian,Xinjiang,Mainshock(MS 7.3)and its aftershock sequence[J].Chinese Journal of Geophysics,2014(03):1012-1020.(In Chinese)
    [17]李金,王琼,吴传勇,等.2015年7月3日皮山6.5级地震发震构造初步研究[J].地球物理学报,2016(08):2859-2870.LI J,WANG Q,WU C Y,et al.Preliminary study for seismogenic structure of the Pishan MS 6.5 earthquake of July 3,2015[J].Chinese Journal of Geophysics,2016(08):2859-2870.(In Chinese)