龚俊,汪贞杰,戴煜暄

• 1:浙江省地震局
• 2:浙江省测绘科学技术研究院

摘要(Abstract)：

针对GPS应用于监测双溪-焦溪垟断裂的运动特征的问题,通过分析文成县和泰顺县交界地区8个测震台和长达12 a 2个跨断层的GPS观测资料,分别采用CAP方法与大地线和沿该断裂进行投影得到的时间序列进行分析,得到测震和GPS一致的观测结果。研究表明:2014年震群期间,双溪-焦溪垟断裂具有右旋走滑特征,位错约4 mm; GPS观测具有长期稳定的优势,对揭示地球物理过程具有重要意义;GPS观测的误差为毫米级,对于运动量很小的断裂通过长期观测和不同方向的分解等方法可以监测到细微变形特征;对于具有震群性质的小地震(震级大于或等于3级、小于5级),GPS依然可以提供断裂地表破裂的绝对值。

关键词(KeyWords)： 双溪-焦溪垟断裂;CAP;震源机制;震群;GPS;地表破裂

Abstract:

Keywords:

基金项目(Foundation): 浙江省地震局科技项目(2020ZJJ04);浙江省地震局“水库地震研究”科技创新团队资助项目

作者(Author): 龚俊,汪贞杰,戴煜暄

DOI: 10.16251/j.cnki.1009-2307.2021.12.001

参考文献(References)：

• [1]马起杨，朱新运．浙江珊溪水库地震震源参数特征研究[J]．地震学报，2016,38(6):835-846.(MA Qiyang,ZHU Xinyun.Characteristics of source parameters of the Shanxi reservoir earthquakes in Zhejiang region[J].Acta Seismologica Sinica,2016,38(6):835-846．）
• [2]朱新运，张帆，于俊谊．浙江珊溪水库地震精细定位及构造研究[J]．中国地震，2010,26(4):380-390.(ZHUXinyun,ZHANG Fan,YU Junyi.Study on precise positioning and structure of the Shanxi reservoir earthquake,Zhejiang Province[J].Earthquake Research in China,2010,26(4):380-390．）
• [3]钟羽云，张帆，赵冬．珊溪水库ML4.6震群精确定位与发震构造研究[J]．地震研究，2011,34(2):158-165.(ZHONGYuyun,ZHANG Fan,ZHAO Dong.Precise relocation and seismogenic structure of the Shanxi reservoir earthquake sequence in Wenzhou,Zhejiang Province[J].Journal of Seismological Research,2011,34(2):158-165．）
• [4]张帆，朱新运，钟羽云．珊溪水库地震小震震源机制解特征研究[J]．地震工程学报，2013,35(3):684-691.(ZHANG Fan,ZHU Xinyun,ZHONG Yuyun.Study on the characteristic of focal mechanism solutions of the Shanxi reservoir earthquake[J].China Earthquake Engineering Journal,2013,35(3):684-691．）
• [5]王鹏，孙冬军，任烨，等．浙江珊溪水库2014年震群活动发震机理研究[J]．地震学报，2017,39(5):648-658.(WANG Peng,SUN Dongjun,REN Ye,et al.Investigation on the seismogenic mechanism of the 2014earthquake swarm in Shanxi reservoir,Zhejiang Province[J].Acta Seismologica Sinica,2017,39(5):648-658．）
• [6]汪贞杰，孙侃，朱新运．单台sPL震相测定珊溪水库地震震源深度[J]．地震学报，2019,41(6):735-742.(WANG Zhenjie,SUN Kan,ZHU Xinyun.Focal depth determination of Shanxi reservoir earthquakes from sPLphase with single station[J].Acta Seismologica Sinica,2019,41(6):735-742．）
• [7]赵静，占伟，任金卫，等．汶川地震后龙门山断层中段愈合过程的GPS时间序列反演[J]．测绘学报，2021,50(1):37-51.(ZHAO Jing,ZHAN Wei,REN Jinwei,et al.GPS time series inversion of the healing process of the middle segment of the Longmenshan fault after the 2008Wenchuan earthquake[J].Acta Geodaetica et Cartographica Sinica,2021,50(1):37-51．）
• [8]刘耀辉，李金平，王刘伟．红河断裂带闭锁程度和滑动亏损分布特征研究[J]．测绘工程，2015,24(8):20-22.(LIU Yaohui,LI Jinping,WANG Liuwei.Inversion study on locking and slip deficit of Red River fault zone[J].Engineering of Surveying and Mapping,2015,24(8):20-22．）
• [9]朱亚戈，刁法启，付誉超，等．基于GPS资料约束的2021年玛多地震发震断层的滑动速率[J]．中国科学：地球科学，2021,51(10):1788-1795.(ZHU Yayi,DIAO Faqi,FU Yuchao,et al.Slip rate of the seismogenic fault of the 2021 Maduo earthquake inferred from GPSobservations[J].Science China Earth Sciences,2021,51(10):1788-1795．）
• [10]尹海权，郭祥云，常明，等．跨断层与GPS地壳形变数据联合反演鲜水河断裂地震危险性[J]．地质学报，2020,94 (8):2487-2499.(YIN Haiquan,GUOXiangyun,CHANG Ming,et al.Inversion of seismic hazard of the Xianshuihe fault by cross-fault and GPScrustal deformation data[J].Acta Geologica Sinica,2020,94(8):2487-2499．）
• [11]王坦，李瑜，张锐，等．GPS在我国地震监测中的应用现状与发展展望[J]．地震研究，2021,44(2):192-207.(WANGTan,LI Yu,ZHANG Rui,et al.GPS in earthquake monitoring in China:Current situation and prospect[J].Journal of Seismological Research,2021,44(2):192-207．）
• [12]周云，李予青，王卫民，等．2020年阿拉斯加MW7.8地震震源特征及邻区地震危险性分析[J]．地球物理学报，2021,64(2):498-506.(ZHOU Yun,LI Yuqing,WANG Weimin,et al.Source characteristics of the2020 Alaska MW7.8 earthquake and seismic risk analysis of adjacent areas[J].Chinese Journal of Geophysics,2021,64(2):498-506．）
• [13]吴啸龙，向洋，汤伏全．基于GPS应变与震源机制解应力反演喜马拉雅构造带现今地壳形变特征[J]．地球物理学报，2020,63(8):2924-2939.(WU Xiaolong,XIANG Yang,TANG Fuquan.Study on current crustal deformation of the Himalayan tectonic zone by GPS strainrate estimation and focal mechanism stress inversion[J].Chinese Journal of Geophysics,2020,63(8):2924-2939．）
• [14]钟羽云，朱新运，张震峰，等．飞云江珊溪水库地震[M]．杭州：浙江大学出版社，2017:1-29.(ZHONGYuyun,ZHU Xinyun,ZHANG Zhenfeng,et al.Feiyun Jiangshanxi reservoir earthquake[M].Hangzhou:Zhejiang University Press,2017:1-29．）
• [15]延斯·哈夫斯科夫，拉斯·奥特莫勒．地震学中的例行数据处理：实例数据、练习和软件[M]．北京：国防工业出版社，2017:164-207.(JENS HAVSKOV,LARSOTTEM?LLER.Routine data processing in earthquake seismology:with sample data,exercises and software[M].Beijing:National Defense Industy Press,2017:164-207．）
• [16]ZHAO L S,HELMBERGER D V.Source estimation from broadband regional seismograms[J].Bull Seismol Soc.Am,1994,84(1):91-104．
• [17]ZHU Lupei,HELMBERGER D V.Advancement in source estimation techniques using broadband regional seismograms[J].Bulletin of the Seismological Society of America,1996,86(5):1634-1641．
• [18]侯林锋，晏云翔，杨福平，等．珊溪水库地区深部构造探测研究[J]．大地测量与地球动力学，2018,38(8):818-822.(HOU Linfeng,YAN Yunxiang,YANGFuping,et al.Research on deep crustal structure in Shanxi reservoir area[J].Journal of Geodesy and Geodynamics,2018,38(8):818-822．）
• [19]黄立人，高砚龙，任立生．关于NEU(ENU）坐标系统[J]．大地测量与地球动力学，2006,26(1):97-99.(HUANG Liren,GAO Yanlong,REN Lisheng.On NEU(ENU)coordinate system[J].Journal of Geodesy and Geodynamics,2006,26(1):97-99．）
• [20]李庆海，陶本藻．概率统计原理和在测量中的应用[M]．北京：测绘出版社，1982.(LI Qinghai,TAO Benzao.Principle of probability and statistics and its application in measurement[M].Beijing:Surveying and Mapping Press,1982．）
• [21]赵静，刘杰，任金卫，等．汶川8.0级地震前GPS与跨断层资料反映的运动与变形演化特征[J]．中国地震，2018,34(3):414-427.(ZHAO Jing,LIU Jie,RENJinwei,et al.Movement and deformation evolution characteristics reflected by GPS and cross-fault data before the MS8.0 Wenchuan earthquake[J].Earthquake Research in China,2018,34(3):414-427．）
• [22]DEAKIN R E.The normal section curve on an ellipsoid[D].Australia:School of Mathematical and Geospatial Sciences RMIT University,2010:107-109．
• [23]石峰．同震水平缩短量的计算：以汶川地震白沙河破裂段为例[D]．北京：中国地震局地质研究所，2010.(SHIFeng.Calculation of co-seismic horizontal shortening amount:a case study of Baishahe rupture segment by the Wenchuan earthquake[D].Beijing:Institute of Geology,China Earthquake Administration,2010．）
• [24]中华人民共和国国家质量监督检验检疫总局，中国国家标准化管理委员会．中华人民共和国推荐性国家标准：防震减灾术语第1部分：基本术语GB/T 18207.1-2008[S]．北京：中国标准出版社，2008.(General Administration of Quality Supervision,Inspection and Quarantine of the People’s Republic of China,Standardization Administration of the People’s Republic of China.National Standard(Recommended)of the People’s Republic of China:Terminology of protecting against and mitigating earthquake disastersPart 1:Basic terms.GB/T 18207.1-2008[S].Beijing:Standards Press of China,2008．）
• [25]GILBERT G K.A theory of the earthquakes of the Great Basin,with a practical application[J].American Journal of Science,1884(157):49-53．
• [26]JIANG Junle,BOCK Y,KLEIN E.Coevolving early afterslip and aftershock signatures of a San Andreas fault rupture[J].Science Advances,2021,7(15):1606.