唐山地区铅垂线变化与地震前后地下物质变化的关系
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摘要
利用中国北京—唐山重力网1987—1998年46期重复测量的资料,计算了唐山地区间隔0.1°×0.1°各点的铅垂线变化.讨论了地下物质变化与地面一点铅垂线变化的关系,以及根据一个区域的铅垂线变化对地下物质变化进行研究的理论和方法;并以唐山地区1988年8月3日mb4.3地震和1995年10月5日mb5.0地震为例,对地震前后地下物质的变化进行了计算,给出了地下扰动体质心的地理位置和深度,以及扰动体本身的质量.证明了该地区伴随地震孕育、发生而产生重力变化和铅垂线变化的现象源自地下物质的变化.依据区域铅垂线变化的测量资料,可以研究地下物质的变化,因而可望为地球科学研究,其中包括地震预测的研究,提供一些前所未有的新信息.
Plumb line variations(PLV) at the points with spacing of 0.1°×0.1°in Tangshan region during 1987—1998 are determined by using 46 batch repeated gravity observations of the Beijing--Tangshan network.Relation between underground material change(UMC) and PLV on ground are discussed and an approach of studying the UMC from regional PLV observation is developed.The UMC before and after two earthquakes(3 Aug.1988,mb4.3;5 Oct.1995,mb5.0) in Tangshan region,as examples,is studied,giving the location and depth of the mass center of underground disturbed body,as well as the mass quantity.It has been demonstrated that the obtained UMC is responsible for the PLV,as well as the gravity changes in the area,where an earthquake may be preparing and is going to occur.It is also possible to study the UMC from the PLV result deduced from the repeated gravity observations in an area.UMC determination is expected to provide new message in earth science study,including earthquake prediction research.
Plumb line variations(PLV) at the points with spacing of 0.1°×0.1°in Tangshan region during 1987—1998 are determined by using 46 batch repeated gravity observations of the Beijing--Tangshan network.Relation between underground material change(UMC) and PLV on ground are discussed and an approach of studying the UMC from regional PLV observation is developed.The UMC before and after two earthquakes(3 Aug.1988,mb4.3;5 Oct.1995,mb5.0) in Tangshan region,as examples,is studied,giving the location and depth of the mass center of underground disturbed body,as well as the mass quantity.It has been demonstrated that the obtained UMC is responsible for the PLV,as well as the gravity changes in the area,where an earthquake may be preparing and is going to occur.It is also possible to study the UMC from the PLV result deduced from the repeated gravity observations in an area.UMC determination is expected to provide new message in earth science study,including earthquake prediction research.
引文
陈运泰,顾浩鼎,卢造勋.1980.1975年海城地震与1976年唐山地震前后的重力变化[J].地震学报,2(1):21-29.
陈运泰,刘克人,郑金涵,宋胜和,刘瑞法,卢红艳,郭风义.2002.局部重力场变化与地震发生的关系合作研究课题的回顾[G]∥孙枢编.理论与应用地球物理进展.北京:气象出版社:40-47.
傅承义,陈运泰,祁贵仲.1985.地球物理学基础[M].北京:科学出版社:6.
顾功叙,Kuo J T,刘克人,郑金涵,卢红艳,刘端法.1997.中国京津唐张地区时间上连续的重力变化与地震的孕育和发生[J].科学通报,42(18):1919-1930.
韩延本,张国栋,胡辉,赵洪声.1994.组建云南天文时纬测震网的意义及可行性[J].地震研究,17(1):1-6.
韩延本,田静.1996.用于垂线变化研究和测震的北京天文时纬预测网[J].地球物理学进展,11(1):97-103.
李辉,付广裕,孙少安,项爱民.2000.滇西地区重力场动态变化计算[J].地壳形变与地震,20(1):60-66.
李辉,付广裕,李正心.2001.重复重力测量结果计算垂线偏差的时间变化[J].地震学报,23(1):61-66.
李月锋,丁行斌.2005.用重复重力测量测定垂线偏差时变的精度[J].天文学报,46(4):460-473.
李正心,李辉.2008.1987—1998年间唐山铅垂线变化及其与周围地震的关联[J].中国科学:D辑,38(4):432-438.
刘克人,郑金涵,郭宗汾,宋胜和,刘端法,卢红艳,郭风义.2002.京津唐张地区的流动重力测量与修改的联合膨胀模型[G]∥孙枢编.理论与应用地球物理进展.北京:气象出版社:167-178.
刘克人,刘端法,郑金涵,宋胜和,郭风义,卢红艳.1998.1991—1997首都圈重力变化与地震预测[J].地震地磁观测与研究,19(1A):100-106.
刘克人,刘端法,卢红艳,郑金涵.1999.对1998重力地震预测的回顾及对1999年的预测[J].地震地磁观测与研究,20(1A):134-137.
张国栋,韩延本,赵复恒.2002.从天文观测提取地震前兆信息[J].地震学报,24(1):75-81.
郑金涵,宋胜合,刘克人,卢红艳,郭宗汾.2003.利用重力资料反演京津唐张地区震质中[J].地震学报,25(4):422-431.
Barlik M,Rogowski J B.1989.Variations of the plumb-line direction obtained from astronomical and gravimetric observa-tions[R].Prace Nauk Politech Warsz,33:19-101.
Barlik M.1996.Variations of the plumb-line at Jozefoslaw from gravimetric determination in1995[R].Latitude Circular118,Warsaw University of Technology:5-6.
Barnes D F.1966.Gravity changes during the Alaska earthquake[J].J Geophys Res,71:451.
Chen Y T,Gu H D,Lu Z X.1979.Variations of gravity before and after the Haicheng earthquake,1975and the Tangs-han earthquake1976[J].Phys Earth Planet Interi,18(4):330-338.
Fujii Y.1966.Gravity changes in the shock area of the Niigata earthquake,16,June1964[J].Zisin(in Japanese),10.
Hagiwara Y,Tajima H,Izutuya S.1978.Gravity changes during the Izu-Oshima-Kinkai earthquake of1978[J].BullEarthquake Research(in Japanese),53:875.
Hunt T M.1970.Gravity associated with the1968Inangahua earthquake[J].New Zealand Journal of Geology and Geo-physics,13:1050.
IAU.1991.Application of optical astrometry time and latitude programs[R].Trans Int Astron Union,1991,XXIB:209.
Kuo J T,Sun Y F.1993.Modeling gravity variations caused by dilatancies[J].Tectonophysics,227:127-143.
Kuo J T,Zheng J H,Song S H,Liu K R.1999.Determination of earthquake epicentroids by inversion of gravity varia-tion data in the BTTZ region,China[J].Tectonophysics,312:267-281.
Li Z X.1998.Measurements of interannual variation of the vertical at Jozefoslaw by astrometric and gravimetric observa-tions[J].Astron Astrophys Suppl,129:353-355.
Li Z X,Li H,Li Y F,Han Y B.2005.Non-tidal variations in the deflection of the vertical at Beijing Observatory[J].Journal of Geodesy,78(9):588-593.
Li Z X,Li H.2009.Earthquake-Related gravity field changes at Beijing-Tangshan gravimetric network[J].Studia Geo-phusica et Geodaetica,53(2):185-197.
陈运泰,刘克人,郑金涵,宋胜和,刘瑞法,卢红艳,郭风义.2002.局部重力场变化与地震发生的关系合作研究课题的回顾[G]∥孙枢编.理论与应用地球物理进展.北京:气象出版社:40-47.
傅承义,陈运泰,祁贵仲.1985.地球物理学基础[M].北京:科学出版社:6.
顾功叙,Kuo J T,刘克人,郑金涵,卢红艳,刘端法.1997.中国京津唐张地区时间上连续的重力变化与地震的孕育和发生[J].科学通报,42(18):1919-1930.
韩延本,张国栋,胡辉,赵洪声.1994.组建云南天文时纬测震网的意义及可行性[J].地震研究,17(1):1-6.
韩延本,田静.1996.用于垂线变化研究和测震的北京天文时纬预测网[J].地球物理学进展,11(1):97-103.
李辉,付广裕,孙少安,项爱民.2000.滇西地区重力场动态变化计算[J].地壳形变与地震,20(1):60-66.
李辉,付广裕,李正心.2001.重复重力测量结果计算垂线偏差的时间变化[J].地震学报,23(1):61-66.
李月锋,丁行斌.2005.用重复重力测量测定垂线偏差时变的精度[J].天文学报,46(4):460-473.
李正心,李辉.2008.1987—1998年间唐山铅垂线变化及其与周围地震的关联[J].中国科学:D辑,38(4):432-438.
刘克人,郑金涵,郭宗汾,宋胜和,刘端法,卢红艳,郭风义.2002.京津唐张地区的流动重力测量与修改的联合膨胀模型[G]∥孙枢编.理论与应用地球物理进展.北京:气象出版社:167-178.
刘克人,刘端法,郑金涵,宋胜和,郭风义,卢红艳.1998.1991—1997首都圈重力变化与地震预测[J].地震地磁观测与研究,19(1A):100-106.
刘克人,刘端法,卢红艳,郑金涵.1999.对1998重力地震预测的回顾及对1999年的预测[J].地震地磁观测与研究,20(1A):134-137.
张国栋,韩延本,赵复恒.2002.从天文观测提取地震前兆信息[J].地震学报,24(1):75-81.
郑金涵,宋胜合,刘克人,卢红艳,郭宗汾.2003.利用重力资料反演京津唐张地区震质中[J].地震学报,25(4):422-431.
Barlik M,Rogowski J B.1989.Variations of the plumb-line direction obtained from astronomical and gravimetric observa-tions[R].Prace Nauk Politech Warsz,33:19-101.
Barlik M.1996.Variations of the plumb-line at Jozefoslaw from gravimetric determination in1995[R].Latitude Circular118,Warsaw University of Technology:5-6.
Barnes D F.1966.Gravity changes during the Alaska earthquake[J].J Geophys Res,71:451.
Chen Y T,Gu H D,Lu Z X.1979.Variations of gravity before and after the Haicheng earthquake,1975and the Tangs-han earthquake1976[J].Phys Earth Planet Interi,18(4):330-338.
Fujii Y.1966.Gravity changes in the shock area of the Niigata earthquake,16,June1964[J].Zisin(in Japanese),10.
Hagiwara Y,Tajima H,Izutuya S.1978.Gravity changes during the Izu-Oshima-Kinkai earthquake of1978[J].BullEarthquake Research(in Japanese),53:875.
Hunt T M.1970.Gravity associated with the1968Inangahua earthquake[J].New Zealand Journal of Geology and Geo-physics,13:1050.
IAU.1991.Application of optical astrometry time and latitude programs[R].Trans Int Astron Union,1991,XXIB:209.
Kuo J T,Sun Y F.1993.Modeling gravity variations caused by dilatancies[J].Tectonophysics,227:127-143.
Kuo J T,Zheng J H,Song S H,Liu K R.1999.Determination of earthquake epicentroids by inversion of gravity varia-tion data in the BTTZ region,China[J].Tectonophysics,312:267-281.
Li Z X.1998.Measurements of interannual variation of the vertical at Jozefoslaw by astrometric and gravimetric observa-tions[J].Astron Astrophys Suppl,129:353-355.
Li Z X,Li H,Li Y F,Han Y B.2005.Non-tidal variations in the deflection of the vertical at Beijing Observatory[J].Journal of Geodesy,78(9):588-593.
Li Z X,Li H.2009.Earthquake-Related gravity field changes at Beijing-Tangshan gravimetric network[J].Studia Geo-phusica et Geodaetica,53(2):185-197.
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