co-seismic coulomb stress changes and its influences on aftershock distribution and surrounding faults caused by 2014 ludian earthquake, yunnan

doi:10.3969/j.issn.0253-4967.2015.04.012

Abstract

Abstract:

The studies of earthquake stress transfer and its influence on regional seismicity have found that earthquake occurrences are highly interactive and correlated rather than isolated and random in traditional point in recently years. A lot of phenomena in earthquake observations such as aftershock distribution, stress shadow, earthquake interaction and migration were well explained based on the theory of earthquake stress interaction. It is important that understanding the process of earthquake interaction could give an insight into the physical mechanism of earthquake cycle, and could help us assess the seismic hazard in future.It has long been recognized that regional stress accumulated by tectonic motion is released when earthquake occurs. When earthquakes occur, the accumulated stress does not vanish completely, but is redistributed through the process of stress transfer, and then the redistributed stress may trigger potential earthquakes. The increment of Coulomb failure stress loading in the certain regions may improve the seismic activities. By contrast, the decrement of Coulomb failure stress in the areas of stress shadow where the stress on faults may unload could lead to the decrement of seismic activities.On August 3, 2014, an M_S6.5 earthquake occurred in Zhaotong-Ludian region, Yunnan Province, China, killing and injuring hundreds of people. Therefore, it is critical to outline the areas with potential aftershocks before reconstruction and re-settlement so as to avoid future disasters. Based on the elastic dislocation theory and multi-layered lithospheric model, we calculate the co-stress changes caused by the Zhaotong-Ludian earthquakes to discuss its influences on aftershock distribution and surrounding faults. It is shown that the Coulomb stress changes based on the rupture in the NNW direction can explain better the aftershock distribution. It indicates that the NNW direction may represent the real rupture. The aftershocks mainly distribute in the regions with increased stress along main rupture and west to the rupture. In other regions with increased stress, the distributions of aftershock are rare which may indicate the low tectonic stress accumulation in these regions. The stress accumulation and corresponding seismic hazard on the southern part of Zhaotong Fault, Qiaojia segment of Zemuhe-Xiaojiang Fault and northeastern part of Lianfeng Fault are further increased by the Zhaotong-Ludian earthquake. We should pay special attention to the southern part of Zhaotong Fault where seismic activity is very high in recently years and the increment of Coulomb failure stress in this area is more than 0.1bar(0.1bar is the threshold of earthquake triggering). In order to make a more objective and comprehensive discussion, we calculate the sensitivity of the parameters such as effective coefficient of friction, the calculated depth and multilayered crustal model.

Key words: Zhaotong-Ludian earthquake, Coulomb failure stress, earthquake triggering, seismic hazard

摘要：

利用弹性位错理论和分层岩石圈模型, 计算了2014年8月3日发生的M_S6.5云南鲁甸地震导致的同震库仑应力变化场, 讨论了主震对余震分布以及对周边主要活动断层的影响。结果表明: 1)基于NNW向破裂面计算得到的应力变化场能够更好地解释余震的空间分布, 可能为主震的破裂面; 2)目前余震主要沿主破裂面及破裂面以西的应力增强区分布, 其他没有余震记录的应力增强区构造应力积累可能较低; 3)鲁甸地震提升了昭通断裂南段、则木河-小江断裂巧家段以及莲峰断裂NE段上的库仑应力增量, 地震危险性有所增强。这些结果对于判断余震可能发生的区域、圈定震区周边未来可能的地震危险区, 对于灾区人员安置、灾后恢复重建, 以及加强震灾和次生灾害防御具有重要的参考价值。

关键词: 鲁甸地震, 库仑破裂应力, 地震触发, 地震危险性

CLC Number:

P315.2

FU Rui, SHAN Bin, XIONG Xiong, ZHENG Yong, XIE Zu-jun, LIU Cheng-li, FANG Li-hua. co-seismic coulomb stress changes and its influences on aftershock distribution and surrounding faults caused by 2014 ludian earthquake, yunnan[J]. SEISMOLOGY AND GEOLOGY, 2015, 37(4): 1084-1095.

付芮, 单斌, 熊熊, 郑勇, 谢祖军, 刘成利, 房立华. 2014年云南鲁甸地震同震库仑应力对余震分布及周边断层的影响[J]. 地震地质, 2015, 37(4): 1084-1095.

References

房立华, 吴建平, 王未来, 等. 2014. 云南鲁甸M_S6.5地震余震重定位及其发震构造［J］. 地震地质, 36(4): 1173—1185. doi: 10.3969/j.issn.0253-4967.2014.04.019.
FANG Li-hua, WU Jian-ping, WANG Wei-lai, et al. 2014. Relocation of the aftershock sequence of the M_S6.5 Ludian earthquake and its seismogenic structure ［J］. Seismology and Geology, 36(4): 1173—1185(in Chinese).
刘成利, 郑勇, 熊熊, 等. 2014. 利用区域宽频带数据反演鲁甸M_S6.5地震震源破裂过程［J］. 地球物理学报, 57(9): 3028—3037. doi: 10.6038/cjg20140927.
LIU Cheng-li, ZHENG Yong, XIONG Xiong, et al. 2014. Rupture process of M_S6.5 Ludian earthquake constrained by regional broadband data ［J］. Chinese Journal of Geophysics, 57(9): 3028—3037(in Chinese).
钱晓东, 秦嘉政. 2008. 小江断裂带及周边地区强震危险性分析［J］. 地震研究, 31(4): 354—361.
QIAN Xiao-dong, QIN Jia-zheng. 2008. Strong earthquake risk analysis of Xiaojiang fault zone and surrounding area ［J］. Journal of Seismological Research, 31(4): 354—361(in Chinese).
单斌, 李佳航, 韩立波, 等. 2012. 2010年M_S7.1玉树地震同震库仑应力变化以及对2011年M_S5.2级囊谦地震的影响［J］. 地球物理学报, 55(9): 3028—3042.
SHAN Bin, LI Jia-hang, HAN Li-bo, et al. 2012. Coseismic Coulomb stress change by 2010 M_S=7.1 Yushu earthquake and its influence to 2011 M_S=5.2 Nangqian earthquake ［J］. Chinese Journal of Geophysics, 55(9): 3028—3042(in Chinese).
万永革. 2001. 地震 "静态应力触发"问题的研究［D］: ［学位论文］. 北京: 中国地震局地球物理研究所.
WAN Yong-ge. 2001. Research on earthquake "Static stress triggering" problem ［D］. Ph D thesis. Institute of Geophysics, China Earthquake Administration, Beijing(in Chinese).
万永革, 沈正康, 兰从欣. 2005. 兰德斯地震断层面及其附近余震产生的位移场研究［J］. 地震学报, 27(2): 139—146.
WAN Yong-ge, SHEN Zheng-kang, LAN Cong-xin. 2005. Study on displacement field generated by aftershocks in Landers seismic fault plane and its adjacent areas ［J］. Acta Seismologica Sinica, 27(2): 139—146.
万永革, 沈正康, 盛书中, 等. 2009. 2008年汶川大地震对周围断层的影响［J］. 地震学报, 31(2): 128—139.
WAN Yong-ge, SHEN Zheng-kang, SHENG Shu-zhong, et al. 2009. The influence of 2008 Wenchuan earthquake on surrounding faults ［J］. Acta Seismologica Sinica, 31(2): 128—139(in Chinese).
万永革, 沈正康, 盛书中, 等. 2010. 2008年新疆于田7.3级地震对周围断层的影响及其正断层机制的区域构造解释［J］. 地球物理学报, 53(3): 280—289.
WAN Yong-ge, SHEN Zheng-kang, SHENG Shu-zhong, et al. 2010. The mechanical effects of the 2008 M_S7.3 Yutian, Xinjiang earthquake on the neighboring faults and its tectonic origin of normal faulting mechanism ［J］. Chinese Journal of Geophysics, 53(3): 280—289(in Chinese).
闻学泽, 杜方, 易桂喜, 等. 2013. 川滇交界东段昭通、莲峰断裂带的地震危险背景［J］. 地球物理学报, 56(10): 3361—3372.
WEN Xue-ze, DU Fang, YI Gui-xi, et al. 2013. Earthquake potential of the Zhaotong and Lianfeng fault zones of the eastern Sichuan-Yunnan border region ［J］. Chinese Journal of Geophysics, 56(10): 3361—3372(in Chinese).
闻学泽, 范军, 易桂喜, 等. 2008. 川西安宁河断裂上的地震空区［J］. 中国科学(D辑), 38(7): 797—807.
WEN Xue-ze, FAN Jun, YI Gui-xi, et al. 2008. A seismic gap on the Anninghe Fault in western Sichuan, China ［J］. Science in China(Ser D), 51(10): 1375—1387.
张广伟, 雷建设, 梁姗姗, 等. 2014. 2014年8月3日云南鲁甸M_S6.5地震序列重定位与震源机制研究［J］. 地球物理学报, 57(9): 3018—3027. doi: 10.6038/cjg20140926.
ZHANG Guang-wei, LEI Jian-she, LIANG Shan-shan, et al. 2014. Relocations and focal mechanism solutions of the 3 August 2014 Ludian, Yunnan M_S6.5 earthquake sequence ［J］. Chinese Journal of Geophysics, 57(9): 3018—3027(in Chinese).
赵博, 高原, 黄志斌, 等. 2013. 四川芦山M_S7.0地震余震序列双差定位、震源机制及应力场反演［J］. 地球物理学报, 56(10): 3385—3395.
ZHAO Bo, GAO Yuan, HUANG Zhi-bin, et al. 2013. Double difference relocation, focal mechanism and stress inversion of Lushan M_S7.0 earthquake sequence ［J］. Chinese Journal of Geophysics, 56(10): 3385—3395(in Chinese).
周宇明, 单斌, 熊熊. 2008. 静态应力触发中影响库仑应力变化的参数敏感性分析［J］. 大地测量与地球动力学, 28(5): 21—26.
ZHOU Yu-ming, SHAN Bin, XIONG Xiong. 2008. Parameters sensitivity analysis of Coulomb stress change in static stress triggering ［J］. Journal of Geodesy and Geodynamics, 28(5): 21—26(in Chinese).
Barka A. 1999. The 17 August 1999 Izmit earthquake ［J］. Science, 285: 1858—1859.
Freed A M. 2005. Earthquake triggering by static, dynamic, and postseismic stress transfer ［J］. Annu Rev Earth Planet Sci, 33: 335—367.
Harris R A, Simpson R W. 1998. Suppression of large earthquakes by stress shadows: A comparison of Coulomb and rate-and-state failure ［J］. J Geophys Res, 103: 24439—24451.
Ji C, Wald D J, Helmberger D V. 2002. Source description of the 1999 Hector Mine, California, earthquake, part I: Wavelet domain inversion theory and resolution analysis ［J］. Bull Seismol Soc Am, 92(4): 1192—1207.
King G C P, Stein R S, Lin J. 1994. Static stress changes and triggering of earthquakes ［J］. Bull Seismol Soc Amer, 84: 935—953.
Meier M A, Werner M J, Woessner J, et al. 2014. A search for evidence of secondary static stress triggering during the 1992 M_W7.3 Landers, California, earthquake sequence ［J］. Journal of Geophysical Research: Solid Earth, 119(4): 3354—3370.
Parsons T, Stein R S, Simpson R W, et al. 1999. Stress sensitivity of fault seismicity: A comparison between limited-offset oblique and major strike-slip faults ［J］. J Geophys Res, 14: 20183—20202.
Shan B, Xiong X, Zheng Y, et al. 2013. Stress changes on major faults caused by 2013 Lushan earthquake, and its relationship with 2008 Wenchuan earthquake ［J］. Science in China: Earth Sciences, 56(7): 1169—1176.
Shan B, Xiong X, Zheng Y, et al. 2009. Stress changes on major faults caused by M_W7.9 Wenchuan earthquake, May 12, 2008 ［J］. Science in China(Ser D), 52(5): 593—601.
Toda S, Stein R S, Reasonberg P A, et al. 1998. Stress transferred by the 1995 M_W=6.5 Kobe, Japan, shock: Effect on aftershocks and future earthquake probabilities ［J］. J Geophys Res, 103: 24543—24565.
Wang R, Kuempel H J. 2003a. Poroelasticity: Efficient modeling of strongly coupled, slow deformation processes in a multi-layered half-space ［J］. Geophysics, 68(2): 705—717.
Wang R, Lorenzo F, Roth F. 2003b. Computation of deformation induced by earthquakes in a multi-layered elastic crust-FORTRAN programs EDGRN/EDCMP ［J］. Comput Geosci-UK, 29: 195—207.
XIE Zu-jun, ZHENG Yong, LIU Cheng-li, et al. 2015. Source parameters of the 2014 M_S6.5 Ludian earthquake sequence and their implications on the seismogenic structure ［J］. Seismological Research Letters.
Xiong X, Shan B, Zheng Y, et al. 2010. Stress transfer and its implication for earthquake hazard on the Kunlun Fault, Tibet ［J］. Tectonophysics, 482(1): 216—225.

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