在地震预测研究中使用GPS和震源机制资料的问题探讨——与王秀文等商榷
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摘要
针对"山西地区应力场变化与地震的关系"一文,本文指出:(1)P波初动存在误读的可能,出现矛盾符号是正常的;(2)地震仪器极性也可能反向,不校核可能会导致错误的震源机制解.还讨论如何正确地表示震源机制随时间的变化.分析认为GPS观测结果若不认真考虑观测误差、模型误差以及应变信息的层次,所得结果可能会与震源机制解反演的区域构造应力场相矛盾.比较了地震与GPS资料存在的差别和二者所提供信息的优劣后,认为二者恰好可以互补.利用GPS和地震两种资料联合反演、解释、相互约束,则可增加反演结果的可靠性.地震学和GPS观测两学科的交叉、融合必将有力地推动地学研究的深入.
In view of "Research on relationship between stress field variation and earthquakes in Shanxi area",this paper shows that 1.it is normal having inconsistent signs because there is some possibility of misreading the first motion polarity of P waveform;2.the polarity of seismometer may be reserved,it would lead to wrong focal mechanisms if the polarity of seismometer is not corrected when we use the first motion polarity to invert for focal mechanism.Moreover,we also discussed how to exactly display the temporal changes of focal mechanisms.Not consider seriously the observational error,model error and the level of strain information,the regional tectonic stress field derived from GPS data would be in contradiction with those from focal mechanisms. Through the comparison of the difference,advantage and disadvantage between seismic data and GPS data,we deem that they just can be complementary.Combined inversion,interpretation and mutual constraint of GPS data and seismic data will increase the reliability of inversion results. Cross-disciplinary integration between seismology and GPS will powerfully push the geosciences research forward.
引文
2)杨国华,杨博,武艳强等.GPS后期数据处理与地壳形变信息提取.会议报告材料(PPT).2010.5.6
    [1]许忠淮.东亚地区现今构造应力图的编制.地震学报,2001, 23(5):492-501 Xu Z H.A present-day tectonic stress map for eastern Asia region.Acta Seismologica Sinica(in Chinese),2001,23 (5):492- 501
    [2]Zoback M L,Zoback M D,Adams J,et al.Global patterns of tectonic stress.Nature,1989,341(6240):291-298
    [3]Wang Q,Zhang P Z,Freymueller J T,et al.Present-day crustal deformation in China constrained by GPS measurements.Science,2001,294(5542):574- 577
    [4]Li Y X,Yang G H,Li Z,et al.Movement and strain ??conditions of active blocks in the Chinese mainland.Science China Earth Sciences,2003,46(Suppl.):82-117
    [5]王秀文,宋美琴,杨国华等.山西地区应力场变化与地震的关系.地球物理学报,2010,53(5):1127-1133 Wang X W,Song M Q,Yang G H,et al.Research on relationship between stress field variation and earthquakes in Shanxi area,China.Chinese J.Geophys.(in Chinese), 2010,53(5):1127-1133
    [6]许向彤,许忠淮,张东宁.求震源机制P波初动解的格点尝试概率法.地震地磁观测与研究,1996,16(4):34-42 Xu X T,Xu Z H,Zhang D N.A probabilistic grid test method of determining earthquake focal mechanism using P-wave onset polarity data.Seismological and Geomagnetic Observation and Research(in Chinese),1996,16(4):34- 42
    [7]Shannon C E.The Mathematical Theory of Communication. Champaign:University of Illinois Press,1949
    [8]Pakiser L C,Steinhart J S.Explosion Seismology in the Western Hemisphere.In:Odishaw H,ed.Research in Geophysics.Cambridge:M.I.T.Press,1964
    [9]Aki K.Signal to Noise Ratio in Seismic Measurements.In: Aoki H,Iizuka S,eds.Volcanoes and Tectonosphere. Tokyo:Tokai University Press,1976
    [10]Aki K,Richards P G.Quantitative Seismology:Theory and Methods.San Francisco:W.H.Freeman and Company, 1980.576-579
    [11]刘巍,王赵丽,孟雁英.大同—阳高2次地震前后震源应力场的变化过程.山西地震,1994,(4):33-39 Liu W,Wang Z L,Meng Y Y.Change process of the focal stress field before and after 2 Datong-Yanggao earthquakes. Earthquake Research in Shanxi(in Chinese),1994,(4): 33-39
    [12]张四昌,刁桂苓,于利民.1989年大同—阳高地震序列的破裂特征.地震学报,1993,15(增刊):528-534 Zhang S C,Diao G L,Yu L M.Fracture feature of 1989 Datong-Yanggao Earthquake.Acta Seismologica Sinica(in Chinese),1993,15(Suppl.):528-534
    [13]刁桂苓,赵英萍,啜永清等.大同晚期强余震前震源机制解的一致性特征.内陆地震,2004,18(3):202-206 Diao G L,Zhao Y P,Chuo Y Q,et al.Coherence characteristics of focal mechanism solutions of later-period strong aftershocks.Inland Earthquake(in Chinese),2004, 18(3):202-206
    [14]李钦祖.华北地壳应力场的基本特征.地球物理学报,1980, 23(4):376-388 Li Q Z.General features of the stress field in the crust of north China.Chinese J.Geophys.(in Chinese),1980,23 (4):376-388
    [15]许忠淮,阎明,赵仲和.由多个小地震推断的华北地区构造应力场的方向.地震学报,1983,5(3):268-279 Xu Z H,Yan M,Zhao Z H.Evaluation of the direction of tectonic stress in north China from recorded data of a large number of small earthquakes.Acta Seismologica Sinica(in Chinese),1983,5(3):268-279
    [16]成尔林,张美芳.山西地堑系现代北西—北北西向拉张应力场.西北地震学报,1990,12(4):20-25 Cheng E L,Zhang M F.Modern NW-NNW tension stress field of rift valley series in Shanxi province.Northwestern Seismological Journal(in Chinese),1990,12(4):20-25
    [17]刘巍,赵新平,安卫平等.山西地区的地壳应力场.山西地震,1993,(3):3-11 Liu W,Zhao X P,An W P,et al.The crustal stress field in Shanxi province.Earthquake Research in Shanxi(in Chinese),1993,(3):3-11
    [18]刁桂苓,徐锡伟,陈于高等.汶川M_w7.9和集集M_w7.6地震前应力场转换现象及其可能的前兆意义.地球物理学报, 2011,54(1):128-136 Diao G L,Xu X W,Chen Y G,et al.The precursory significance of tectonic stress field transformation before the Wenchuan M_w7.9 earthquake and the Chi-Chi M_w7.6 earthquake.Chinese J.Geophys.(in Chinese),2011,54 (1):128-136
    [19]Frohlich C.Triangle diagrams:ternary graphs to display similarity and diversity of earthquake focal mechanisms. Physics of the Earth and Planetary Interiors,1992,75(1- 3):193-198
    [20]刁桂苓,于利民,李钦祖.震源机制解的系统聚类分析—以海城地震序列为例.中国地震,1992,(3):86-92 Diao G L,Yu L M,Li Q Z.Hierarchical clustering analysis of the focal mechanism solution-taking the Haicheng earthquake sequences for example.Earthquake Research in China(in Chinese),1992,(3):86- 92
    [21]王俊国,刁桂苓.千岛岛弧大震前哈佛大学矩心矩张量(CMT)解一致性的预测意义.地震学报,2005,27(2): 178-183 Wang J G,Diao G L.Consistent CMT solutions from Harvard university before the great earthquakes in Kurile islands and its significance for earthquake prediction.Acta Seismologica Sinica(in Chinese),2005,27(2):178-183
    [22]郭良迁,占伟,杨国华等.山西断陷带的近期位移和应变率特征.大地测量与地球动力学,2010,30(4):36-42 Guo L Q,Zhan W,Yang G H,et al.Short-term displacement and characteristics of strain rate of Shanxi fault subsidence zone.Journal of Geodesy and Geodynamics(in Chinese),2010,30(4):36-42
    [23]杨国华,韩月萍,杨博等.华北地区最近几年水平形变场的含义与讨论.山东科技大学学报(自然科学版),2009,28 (6):1-8 Yang G H,Han Y P,Yang B,et al.Meanings and discussion on the horizontal deformation fields in north China in recent years.Journal of Shandong University of Science and Technology(Natural Science)(in Chinese),2009,28 ??(6):1-8
    [24]梁尚鸿,李幼铭,束沛镒等.利用区域地震台网P、S振幅比资料测定小震震源参数.地球物理学报,1984,27(3):249-256 Liang SH,Li Y M,Shu P Y,et al.On the determining of source parameters of small earthquakes by using amplitude ratios of P and S from regional network observations.Chinese J.Geophys.(Acta Geophysica Sinica)(in Chinese),1984, 27(3):249-256
    [25]Gephart J W.FMSI:A fortran program for inverting fault/ slickenside and earthquake focal mechanism data to obtain the regional stress tensor.Computers & Geosciences,1990,16 (7):953-989
    [26]邓起东,冉永康,杨晓平等.中国活动构造图.北京:地震出版社,2007 DengQ D,Ran Y K,Yang X P,et al.Map of Active Tectonics m China(in Chinese).Beijing:Seismological Press,2007
    [27]Niu F L,Li J.Component azimuths of the CEArray stations estimated from P-wave particle motion.Earthquake Science, 2011,24(1):3-13
    [28]Zhao L S,Helmberger D V.Source estimation from, broadband regional seismograms.Bull.Seism.Soc.Am., 1994,84:91-104
    [29]Zhu L P,Helmberger D V.Advancement in source estimation techniques using broadband regional seismograms. Bull,Seism.Soc.Am.,1996,86(5):1634-1641
    [30]Sonke J A,Munsey J W,Teague A G,et al.A program for focal mechanism determination by combined use of polarity and SV-P amplitude ratio data.Earthquake Notes,1984,55 (3):15
    [31]朱守彪,石耀霖.由GPS站点速度观测误差引起的应变率计算结果的误差分析.大地测量与地球动力学,2007,27(6): 51-57 Zhu S B,Shi Y L.Error analysis of strain rates resulted from errors of GPS measurement.Journal of Geodesy and Geodynamics(in Chinese),2007,27(6):51-57
    [32]杨国华,武艳强,杨博等.应变计算与分析的若干问题及有关偏差的修正.大地测量与地球动力学,2010,30(4): 59-63 Yang G H,Wu Y Q,Yang B,et al.Several problems of strain calculation analysis and the correction of related deviation.Journal of Geodesy and Geodynamics(in Chinese),2010,30(4):59-63
    [33]杨博,张风霜,占伟等.水平运动场滤波试验与应变计算.大地测量与地球动力学,2010,30(5):106-111 Yang B,Zhang F S,Zhan W,et al.Experiment for filtering horizontal movement field and its strain calculation.Journal of Geodesy and Geodynamics(in Chinese),2010,30(5): 106-111

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