Sumatra-Adaman大地震同震和震后形变的GRACE卫星检测
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摘要
利用CSR公布的RL-04版GRACE卫星月重力场模型计算了9.1级Sumatra-Adaman大地震的同震和震后形变效应。数值结果表明,GRACE能够监测到的同震和震后形变量为-20～10cm的等效水高,为大地震同震和震后形变监测提供了一种独特、有效的方法。
The co-seismic and post-seismic deformation caused by Sumatra-Adaman earthquake are computed by using RL04 GSM monthly gravity model of GRACE published by CSR.The analysis and comparison of numerical results show that co-seismic and post-seismic deformation information about-20-10 cm equivalent water thickness from large earthquake can be detected by GRACE satellite gravity surveying.
The co-seismic and post-seismic deformation caused by Sumatra-Adaman earthquake are computed by using RL04 GSM monthly gravity model of GRACE published by CSR.The analysis and comparison of numerical results show that co-seismic and post-seismic deformation information about-20-10 cm equivalent water thickness from large earthquake can be detected by GRACE satellite gravity surveying.
引文
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[16]谈洪波,申重阳,李辉.断层位错引起的地表重力变化特征研究[J].大地测量与地球动力学,2008,28(4):54-62
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[18]Fault Model in USGS Site[OL].http://neic.usgs.gov/neis/eq-depot/2004/eq-041226/neic-slav-ff.ht ml,2008
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[2]Sun W,Okubo S.Co-seismic Deformations Detect-able by Satellite Gravity Mission-a Case Study of Alaska(1964,2002)and Hokaido(2003)Earthquake in the Spectral domain[J].J Res,2004,109(B4):B04405
[3]孙文科.地震火山活动产生重力变化的理论与观测研究的进展及现状[J].大地测量与地球动力学,2008,28(4):45-53
[4]Han S C,Shum C K,Bevis M,et al.Crustal Dila-tation Observed by GRACE After the2004Suma-tra-Andaman Earthquake[J].Science,2006,313:658-662
[5]Ogawa R,Heki K.Slow Postseismic Recovery of Geoid Depression Formed by the2004Sumatra-An-daman Earthquake by Mantle Water Diffusion[J].Geophy Res Lett,2007,34:l06313
[6]Chen J L,Wilson C R,Tapley B D,et al.GRACE Detects Coseismic and Postseismic Deformationfrom the Sumatra-Andaman Earthquake[J].Geo-phys Res Lett,2007,34:L13302
[7]李建成,陈俊勇,宁津生,等.地球重力场逼近理论与中国2000似大地水准面的确定[M].武汉:武汉大学出版社,2003
[8]罗志才.利用卫星重力梯度数据确定地球重力场的理论与方法[D].武汉:武汉大学,1996
[9]Wahr J,Molenaar M,Brayan F.Ti me Variability of the Earth’s Gravity Field:Hydrological and Oce-anic Effects and Their Possible Detection Using GRACE[J].J Geophys Res,1998,103(B12):30205-30299
[10]周旭华,吴斌,彭碧波,等.全球水储量变化的GRACE卫星检测[J].地球物理学报,2006,49(6):1644-1650
[11]Jekeli C.Alternative Methods to Smooththe Earth’s Gravity Field[D].Columbus:Ohio State Univer-sity,1981
[12]邹正波,邢乐林,李辉,等.中国大陆及邻区GRACE卫星重力变化研究[J].大地测量与地球动力学,2008,28(1):23-27
[13]王丹,李辉,申重阳,等.地面重力时空变化向卫星高度的解析延拓[J].大地测量与地球动力学,2005,25(2):69-74
[14]黄振威.利用GRACE数据恢复陆地水储量变化的方法研究[D].武汉:武汉大学,2008
[15]Chen J L,Wilson C R,Tapley B D,et al.Low De-gree Gravitational Changes from GRACE:Valida-tion and Interpretation[J].Geophy Res Lett,2004,31:L22607
[16]谈洪波,申重阳,李辉.断层位错引起的地表重力变化特征研究[J].大地测量与地球动力学,2008,28(4):54-62
[17]Sun W,Okubo S.Surface Potential and Gravity Changes Due to Internal Dislocations in a Spherical Earth-Ⅰ.Theory for a Point Dislocation[J].Geo-phys J Int,1993,114:569-592
[18]Fault Model in USGS Site[OL].http://neic.usgs.gov/neis/eq-depot/2004/eq-041226/neic-slav-ff.ht ml,2008
[19]Chen J L,Wilson C R,Tapley B D.Satellite Gravi-ty Measurements Confirm Accelerated Melting of Greenland Ice Sheet[J].Science,2006,313:1958-1960
[20]宁津生.跟踪世界发展动态致力地球重力场研究[J].武汉大学学报.信息科学版,2001,26(6):471-474
[21]陈俊勇.重力卫星五年运行对求定地球重力场模型的进展和展望[J].地球科学进展,2006,21(7):661-665
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