How Did the 2013 Lushan Earthquake (Ms?=?7.0) Trigger its Aftershocks? Insights from Static Coulomb Stress Change Calculations

详细信息    查看全文

• 作者：Shoubiao Zhu ; Miao Miao
• 关键词：Aftershock triggering ; static Coulomb stress changes ; afterslip ; pore fluid flow ; Lushan earthquake
• 刊名：Pure and Applied Geophysics
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：172
• 期：10
• 页码：2481-2494
• 全文大小：2,799 KB
• 参考文献：Anderson , G., & Johnson , H. 1999. A new statistical test for static stress triggering: Application to the 1987 Superstition Hills earthquake sequence. J. Geophys. Res., 104(B9): 20153-0120,20168.
  Bosl , W.J. & Nur , A. 2002. Aftershocks and pore fluid diffusion following the 1992 Landers earthquake, J. geophys. Res., 107(B12), 2366, doi:10.-029/-001JB000155 .
  Bounif , A., Dorbath , C., Ayadi , A., Meghraoui , M., Beldjoudi , H., Laouami , N., Frogneux , M., Slimani, A., Alasset , P., & Kharroubi , A. 2004. The 21 May 2003 Zemmouri (Algeria) earthquake Mw 6.8: relocation and aftershock sequence analysis. Geophys. Res. Lett., 31(19): L19606.
  Burchfiel , B.C., Chen , Z., Liu , Y., & Royden , L.H. 1995. Tectonics of the Longmen Shan and adjacent regions. International Geology Review 37: 661-35.
  Burchfiel , B.C., Royden , L.H., van der Hilst , R.D., Hager , B.H., Chen , Z., King , R.W., Li , C., Lü , J., Yao , H., & Kirby , E. 2008. A geological and geophysical context for the Wenchuan earthquake of 12 May 2008, Sichuan, People’s Republic of China. GSA Today 18: 4-1, doi:10.-130/?GSATG18A.- .
  Chan , C. H., & Stein , R. S. 2009. Stress evolution following the 1999 Chi-Chi, Taiwan, earthquake: consequences for afterslip, relaxation, aftershocks and departures from Omori decay.?Geophysical Journal International,?177(1), 179-92.
  Cocco , M., & Rice , J. R. 2002. Pore pressure and poroelasticity effects in Coulomb stress analysis of earthquake interactions. J. Geophys. Res., 107(B2): 2030.
  Das , S., & Scholz , C. H. 1981. Off-fault aftershock clusters caused by shear stress increase? Bull. Seism. Soc. Am, 71(5): 1669-675.
  Dieterich , J. H. 1979. Modeling of rock friction: 2. Simulation of preseismic slip. Journal of Geophysical Research: Solid Earth (1978-012), 84(B5): 2169-175.
  Fialko , Y. 2004, Evidence of fluid-filled upper crust from observations of postseismic deformation due to the 1992 Mw7.3 Landers earthquake, J. Geophys. Res., 109, B08401, doi:10.-029/-004JB002985 .
  Freed , A. 2005, Earthquake triggering by static, dynamic, and postseismic stress transfer. Annu. Rev. Earth Planet. Sci., 33:335-67.
  Gavrilenko , P. 2005. Hydromechanical coupling in response to earthquakes:on the possible consequences for aftershocks, Geophys. J. Int., 161(1), 113-29.
  Ge , S., & Stover , S. C. 2000. Hydrodynamic response to strike-and dip-slip faulting in a half-space. J. Geophys. Res., 105(B11): 25513-5524.
  Gomberg , J., Beeler , N. M., Blanpied , M., & Bodin , P. 1998. Earthquake triggering by transient and static deformations. J. Geophys. Res., 103(B10): 24411-4426.
  Gomberg , J., Reasenberg , P., Bodin , P., & Harris , R. 2001. Earthquake triggering by seismic waves following the Landers and Hector Mine earthquakes. Nature, 411(6836): 462-66.
  Gomberg , J., & Johnson , P. 2005. Seismology: Dynamic triggering of earthquakes.?Nature,?437(7060), 830-30.
  Gutenberg , B., & Richter , C. F. 1944. Frequency of earthquakes in ? California.?Bulletin of the Seismological Society of America,?34(4): 185-88.
  Hainzl , S., G. Z?ller , & R. Wang 2010, Impact of the receiver fault distribution on aftershock activity, J. Geophys. Res., 115, B05315, doi:10.-029/-008JB006224 .
  Hardebeck , J. L., Nazareth , J. J., & Hauksson , E. 1998. The static stress change triggering model: Constraints from two southern California aftershock sequences. J. Geophys. Res., 103(B10): 24427-4437.
  Harris , R. A. 1998. Introduction to special section: Stress triggers, stress shadows, and implications for seismic hazard. J. Geophys. Res., 103(B10): 24347-4358.
  Harris , R. A., Simpson , R. W., & Reasenberg , P. A. 1995. Influence of static stress changes on earthquake locations in southern California. Nature, 375(6528): 221-24.
  Hearn , E. H., Bürgmann , R., & Reilinger , R. E. (2002). Dynamics of Izmit earthquake postseismic deformation and loading of the Düzce earthquake hypocenter.?Bulletin of the Seismological Society of America,?92(1), 172-93.
  Helmstetter , A., & B. E. Shaw (2009), Afterslip and aftershocks in the rate-and-state friction law, J. Geophys. Res., 114, B01308, doi:10.-029/-007JB005077 .
  Hsu , Y.-J., M. Simons , J.-P. Avouac , J. Galetzka , K. Sieh , M. Chlieh , D. Natawidjaja , L. Prawirodirdjo , & Y. Bock (2006), Frictional afterslip following the 2005 Nias-Simeulue earthquake, Sumatra, Science, 312, 1921-926, doi:10.-126/?science.-126960 .
  Kennedy B. M., Y. K. Kharaka , W. C. Evans , A. Ellwood ., et al. Mantle Fluids in the San Andreas Fault System, California. Science,1997, 278:1278-281, DOI: 10.-126/?science.-78.-341.-278 .
  Kilb , D., Ellis , M., Gomberg , J., & Davis , S. 1997. On the origin of diverse aftershock mechanisms following the 1989 Loma Prieta earthquake. Geophysical Journal International, 128(3): 557-70.
  Kilb , D., Gomberg, J., & Bodin , P. 2000. Triggering of earthquake aftershocks by dynamic s
• 作者单位：Shoubiao Zhu (1) (2)
  Miao Miao (1)
  
  1. Institute of Crustal Dynamics, China Earthquake Administration, No. 1, Road Anningzhuan, Haidian District, Beijing, 100085, China
  2. Key Lab of Computational Geodynamics, Chinese Academy of Sciences, Beijing, 100049, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geophysics and Geodesy
  
• 出版者：Birkh盲user Basel
• ISSN：1420-9136

文摘

The Lushan earthquake Ms7.0 occurred at 08:02 Beijing Time (00:02 UTC) on 20 April 2013, located on the eastern margin of the Tibetan Plateau, where the 2008 Ms8.0 Wenchuan earthquake took place. The other strong shock following the Wenchuan earthquake occurred on the Longmen Shan thrust fault. A large number of aftershocks were recorded after the mainshock. To investigate how the aftershocks were triggered, we firstly relocated the 6-month aftershock sequence by the double-difference algorithm. Next, we calculated Coulomb failure stress changes imparted by the Lushan mainshock both on the optimally oriented plane and on the aftershock nodal planes. Then we examined the correspondence between the Coulomb failure stress changes and the spatial distribution of the aftershocks. The computed results show that most of the aftershock hypocenters did not occur on the region with the positive Coulomb stress changes caused by the Lushan mainshock. Moreover, the majority of aftershock nodal planes were brought away from failure by coseismic Coulomb stresses. This implies that coseismic static Coulomb stress changes may not be the governing process for aftershock genesis. In contrast, postseismic stress transfer by processes of afterslip and pore fluid flow are assumed to play an important part in aftershock triggering, based upon the spatiotemporal distribution of the aftershocks. Keywords Aftershock triggering static Coulomb stress changes afterslip pore fluid flow Lushan earthquake