苍山地震库仑破裂应力变化与地震活动相关性探讨
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
本文收集了苍山地震周围断层的几何参数和运动学参数,选择不同的接受断层,研究了苍山地震库仑应力变化对余震及周边断层活动的影响。结果表明,苍山地震正的库仑应力变化对余震活动有促进作用,大部分苍山余震分布于库仑应力变化增加区域,应力增加量值为0.003~0.005MPa。通过对比该地区苍山地震前后16年的地震资料,发现苍山地震正的库仑应力变化对苍山断裂附近地震活动增强亦有一定的促进作用,而对于周边其他断层,由于距离较远,库仑应力变化量较小,苍山地震库仑应力变化的影响可以忽略。
In order to investigate Coulomb stress changes from the 1995 Cangshan M5.2 earthquake and the effects on surrounding faults,geometry parameters and kinematic parameters of faults have been collected and different received faults are used.The results show that the positive Coulomb stress promotes aftershock activities and most aftershocks distributed in Coulomb stress increasing region,the value of which is about 0.003~0.005 MPa.Comparing the seismic references of 16 years before and after the Cangshan earthquake,we found that positive Coulomb stress increases the stress around Cangshan fault,but the effects of the Coulomb stress changes on other faults can be ignored due to the farther distance.
引文
①http://quake.usgs.gov/research/deformation/modeling/coulomb/index.html
    [1]李家灵,晁洪太,崔昭文,等.1668年郯城8.5级地震断层及其破裂机制[J].地震地质,1994,16(3):229-237.
    [2]晁洪太,崔昭文,李家灵.鲁中地区北西向断裂及其第四纪晚期的活动特征[J].地震学刊,1992,(2):1-10.
    [3]王志才,晁洪太.1995山东苍山5.2级地震的发震构造[J].地震地质,1999,21(2):115-120.
    [4]Harris R A.Introduction to special section:Stress triggers,stress shadows,and implications forseismic hazard[J].J Geophys Res,1998,103:24 347-24 358.
    [5]Stein R S,Lisowski M.The 1979Homestead Valley earthquake sequence,California:Control of af-tershocks and postseismic deformation[J].J Geophys Res,1983,88:6 477-6 490.
    [6]King G,Stein R S,Jian L.Static stress changes and the triggering of earthquake[J].Bull SeismolSoc Am,1994,84:935-953.
    [7]Toda S,Stein R S,Richards-Dinger K,et al.Forecasting the evolution of seismicity in southernCalifornia:Animations built on earthquake stress transfer[J].Journal of Geophysical Research,v.2005,110,B05S16,doi:10.1029/2004JB003415.
    [8]Lin J,Stein R S.Stress triggering in thrust and subduction earthquakes,and stress interaction be-tween the southern San Andreas and nearby thrust and strike-slip faults[J].Journal of GeophysicalResearch,v.2004,109,B02303,doi:10.1029/2003JB002607.
    [9]Toda S.Stress transferred by the 1995 MW=6.9Kobe,Japan,shock:Effect on aftershocks and fu-ture earthquake probabilities[J].J Geophys Res,1998,103(B10):24 543-24 565.
    [10]Stein R S.The role of stress transfer in earthquake occurrence[J].Nature 1999,402:605-609.
    [11]Okada Y.Internal deformation due to shear and tensile faults in a half-space[J].Bull Seismol SocAm,1992,82:1 018-1 040.
    [12]Toda S,Stein R S,King G.Coulomb_25_User_Guide[M].USGS,2003.
    [13]周翠英,耿杰.山东地区地震分析预报手册[M].北京:地震出版社,2010.
    [14]Chinnery M.The stress changes that accompany strike-slip faulting[J].Bull Seismol Soc Am,1963,53:9 231-932.
    [15]Reasenberg P A,Simpson R W.Response of regional seismicity to the static stress change producedby the Loma Prieta earthquake[J].1992,255:1 687-1 690.
    [16]Hardebeck J L,Nazareth J J,Hauksson E.The static stress change triggering model:Constraintsfrom two southern California aftershock sequence[J].J Geophys Res,1998,103:24 427-24 437.
    [17]刘桂萍,傅征祥.1976年7月28日唐山7.8级地震前应力场的动态变化[J].地震学报,2000,22(5):17-26.
    [18]Ziv A,Rubin A M.Static stress transfer and earthquake triggering:No lower threshold in sight?[J].J Geophys Res,2000,105:13 631-13 642.
    [19]Shapiro S A,Kummerrow J.Fluid induced seismicity guided by a continental fault:injuction experi-ment of 2004/2005at the German Deep Drilling Site(KTB)[J].Geophysical R L 2006,33(1):1-4.
    [20]张晶,郗钦文,杨林章,等.引潮力和潮汐应力对强震触发的研究[J].地球物理学报,2007,50(2):448-454.
    [21]Cocco M,Hainzl S,Catalli F,et al.Sensitivity study of forecasted aftershock seismicity based oncoulomb stress calculation and rate and state-dependent frictional response[J].J Geophys Res,2010,115(B05307):1-15.
    [22]王志才,贾荣光.沂沭断裂带安丘—莒县断裂安丘—朱里段几何结构与活动特征[J].地震地质,2005,27(2):212-220.
    [23]贾荣光,王志才,王健,等.潍坊市主要隐伏断层活动特征研究[J].震害防御技术,2007,2(3):249-263.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心