WANG TongLi,
CUI BoWen,
YE Qing et al
.2020.Temporal-spatial distribution of apparent resistivity before and after the Jiuzhaigou MS7.0 earthquake Chinese Journal of Geophysics(in Chinese),63(6): 2345-2356,doi: 10.6038/cjg2020N0454
Abstract:The Jiuzhaigou MS7.0 earthquake occurred in Sichuan Province on August 8, 2017. In this paper, data collected from a total of 25 stations distributed within ~800 km of the epicenter of the Jiuzhaigou MS7.0 earthquake from 2012 to 2018,were used to investigate the temporal-spatial evolution of apparent resistivity by applying the Normalized Variation Rate Method (NVRM). The results are as follows: (1) Apparent resistivity anomalies were observed at 14 stations around the epicenter before the earthquake. Combining with the focal mechanism analysis, we suggested that the temporal spatial variation of apparent resistivity observed at Linxia, Tongwei, Wudu and Baoji stations adjacent to the earthquake rupture zone was consistent with the development of apparent resistivity anomaly associated with the mechanism of earthquake. (2) Negative abnormal changes of apparent resistivity occurred in a large area and were featured with a two-quadrant distribution pattern around the epicenter before the earthquake. The long axis direction of the area with apparent resistivity anomaly was nearly perpendicular to the direction of the earthquake rupture, the fault strike, and the long axis direction of the earthquake intensity distribution, and was also consistent with the direction of the maximum principal stress. Our results obtained in this paper showed that the apparent resistivity anomaly observed near the epicenter before the mainshock could be served as seismic precursory for short-term earthquake prediction, therefore the dynamic evolution of the apparent resistivity anomaly is of great significance for understanding the mechanism of earthquake and the distribution of stress field.
Barsukov O M, Sorokin O N. 1973. Variations in apparent resistivity of rocks in the seismically active Garm region. Izv.Acad.Sci.U.S.S.R (Phys.Solid Earth), 8:685-687. Du X B, Tan D C. 2000. On the temporal and spatial clusters of one-year scale anomalies of earth-resistivity and the relation to seismicity. Earthquake Research in China (in Chinese), 16(3):283-292, doi:10.3969/j.issn.1001-4683.2000.03.010. Du X B, Ruan A G, Fan S H, et al. 2001. Anisotropy of the variation rate of apparent resistivity near the epicentral region of strong earthquake. Acta Seismologica Sinica (in Chinese), 23(3):289-297. Du X B, Li N, Ye Q, et al. 2007. A possible reason for the anisotropic changes in apparent resistivity near the focal region of strong earthquake. Chinese Journal of Geophysics (in Chinese), 50(6):1802-1810. Du X B. 2010. Two types of changes in apparent resistivity in earthquake prediction. Science China Earth Sciences(in Chinese), 40(10):1321-1330. Gui X T, Guan H P, Dai J A. 1989. The short-term and immediate anomalous pattern recurrences of the apparent resistivity before the Tangshan and Songpan earthquakes of 1976. Northwestern Seismological Journal (in Chinese), 11(4):71-75. Guo Z J, Qin B Y, Xu W Y, et al. 1973. Preliminary study on a model for the development of the focus of an earthquake. Acta Geophysica Sinica (in Chinese), 16(1):43-48. Huang Q H. 2011. Retrospective investigation of geophysical data possibly associated with the MS8.0 Wenchuan earthquake in Sichuan, China. Journal of Asian Earth Sciences, 41(4-5):421-427. Liang S S, Lei J S, Xu Z G, et al. 2018. Relocation of aftershocks of the 2017 Jiuzhaigou, Sichuang, MS7.0 earthquake and inversion for focal mechanism of the mainshock. Chinese Journal of Geophysics (in Chinese), 61(5):2163-2175, doi:10.6038/cjg2018L0508. Lu J, Xue S Z, Qian F Y, et al. 2004. Unexpected changes in resistivity monitoring for earthquakes of the Longmen Shan in Sichuan, China, with a fixed Schlumberger sounding array. Physics of the Earth and Planetary Interiors, 145(1-4):87-97. Lu J, Xie T, Li M, et al. 2016. Monitoring shallow resistivity changes prior to the 12 May 2008 M8.0 Wenchuan earthquake on the Longmen Shan tectonic zone, China. Tectonophysics, 675:244-257. Mazzella A, Morrison H F. 1974. Electrical resistivity variations associated with earthquakes on the San Andreas faults. Science, 185(4154):855-857. Mjachkin V I, Brace W F, Sobolev G A, et al. 1975. Two models for earthquake forerunners. Pure and Applied Geophysics, 113(1):169-181. Morrison H F, Corwin R F, Chang M. 1977. High-accuracy determination of temporal variations of crustal resistivity. Earth Crust, 20:593-614. Niu Z R. 1978. On the theory of precursors of tectonic earthquakes-dilatancy-creep model of earthquake source development. Acta Geophysica Sinica (in Chinese), 21(3):199-212. Nur A. 1972. Dilatancy, pore fluids, and premonitory variations of ts/tp travel times. Bulletin of the Seismological Society of America, 62(5):1217-1222. Qi Y P, Long F, Xiao B F, et al. 2018. Focal mechanism solutions and tectonic stress field characteristics of the 2017 MS7.0 Jiuzhaigou earthquake sequence. Acta Geoscientica Sinica (in Chinese), 39(5):622-634. Qian F Y, Zhao Y L, Yu M M, et al. 1982. The anomalous changes of georesistivity before earthquake. Science in China B series (in Chinese), 12(9):831-839. Qian F Y, Zhao Y L, Liu J, et al. 1990. Power spectrum anomaly of earthresistivity immediately before Tangshan earthquake M7.8. Earthquake (in Chinese), (3):33-39. Qian J D, Chen Y F, Jin A Z. 1985. The Geo-resistivity Method Used in Earthquake Prediction (in Chinese). Beijing:Seismological Press. Qian J D. 2010. Earthquake Electromagnetics Theory Basis and Observation Technology (in Chinese). Beijing:Seismological Press. Qian J D, Ma Q Z, Li S N. 2013. Further study on the anomalies in apparent resistivity in the NE configuration at Chengdu station associated with Wenchuan MS8.0 earthquake. Acta Seismologica Sinica (in Chinese), 35(1):4-17. Ren J J, Xu X W, Zhang S M, et al. 2017. Tectonic transformation at the eastern termination of the Eastern Kunlun fault zone and seismogenic mechanism of the 8 August 2017 Jiuzhaigou MS7.0 earthquake. Chinese Journal of Geophysics (in Chinese), 60(10):4027-4045, doi:10.6038/cjg20171029. Scholz C H, Sykes L R, Aggarwal Y P. 1973. Earthquake prediction:A physical basis. Science, 181(4102):803-810. Wang X H, Qi G Z, Zhao Y L. 1984. The extension before fault instability and geo-resistivity precursors. Science in China B Series (in Chinese), 14(11):1026-1038. Wang Z L, Zheng D L, Yu S R. 2002. Geoelectric Resistivity Precursor Anomalies of Earthquake (in Chinese). Beijing:Seismological Press. Xu X W, Chen G H, Wang Q X, et al. 2017. Discussion on seismogenic structure of Jiuzhaigou earthquake and its implication for current strain state in the southeastern Qinghai-Tibet Plateau. Chinese Journal of Geophysics (in Chinese), 60(10):4018-4026, doi:10.6038/cjg20171028. Yamazaki Y. 1975. Precursory and coseismic resistivity changes. Pure and Applied Geophysics, 113(1):219-227. Ye Q, Du X B, Chen J Y, et al. 2005. One-year prediction for the Dayao and Minle-shandan earthquakes in 2003. Journal of Seismological Research (in Chinese), 28(3):226-230. Yi G X, Long F, Liang M J. et al. 2017. Focal mechanism solutions and seismogenic structure of the 8 August 2017 M7.0 Jiuzhaigou earthquake and its aftershocks, northern Sichuan. Chinese Journal of Geophysics (in Chinese), 60(10):4083-4097, doi:10.6038/cjg20171033. Zhang G M, Geng L M, Zhang Y X, et al. 1995. Group seismogenic model of tectonic block and analysis of characteristics of precursory field. Acta Seismologica Sinica (in Chinese), 17(1):1-10. Zhang P Z, Deng Q D, Zhang G M, et al. 2003. Active tectonic blocks and strong earthquakes in the continent of China. Science in China Series D:Earth Sciences (in Chinese), 33(s1):12-20. Zhao L S, Helmberger D V. 1994. Source estimation from broad-band regional seismograms. Bulletin of the Seismological Society of America, 84(1):91-104. Zhao Y L, Lu J, Zhang H K, et al. 2001. The application of electrical measurements to earthquake prediction in China. Seismology and Geology (in Chinese), 23(2):277-285. Zheng G L, Du X B, Chen J Y, et al. 2011. Influence of active faults on earthquake-related anomalies of geo-electric resistivity. Acta Seismologica Sinica (in Chinese), 33(2):187-197. Zhu L P, Helmberger D V. 1996. Advancement in source estimation technique using broad-band regional seismograms. Bulletin of the Seismological Society of America, 86(5):1634-1641. Zhu T. 2013. Preliminary study on regional geo-resistivity anomaly before the Wenchuan MS8.0 earthquake. Acta Seismologica Sinica (in Chinese), 35(1):18-25. 附中文参考文献 杜学彬, 谭大诚. 2000. 地电阻率1年尺度异常时空丛集现象与地震活动性. 中国地震, 16(3):283-292, doi:10.3969/j.issn.1001-4683.2000.03.010. 杜学彬, 阮爱国, 范世宏等. 2001. 强震近震中区地电阻率变化速率的各向异性. 地震学报, 23(3):289-297. 杜学彬, 李宁, 叶青等. 2007. 强地震附近视电阻率各向异性变化的原因. 地球物理学报, 50(6):1802-1810. 杜学彬. 2010. 在地震预报中的两类视电阻率变化. 中国科学:地球科学, 40(10):1321-1330. 桂燮泰, 关华平, 戴经安. 1989. 唐山、松潘地震前视电阻率短临异常图象重现性. 西北地震学报, 11(4):71-75. 郭增建, 秦保燕, 徐文耀等. 1973. 震源孕育模式的初步讨论. 地球物理学报, 16(1):43-48. 梁姗姗, 雷建设, 徐志国等. 2018. 2017年四川九寨沟MS7.0强震的余震重定位及主震震源机制反演. 地球物理学报, 61(5):2163-2175, doi:10.6038/cjg2018L0508. 牛志仁. 1978. 构造地震的前兆理论-震源孕育的膨胀-蠕动模式. 地球物理学报, 21(3):199-212. 祁玉萍, 龙锋, 肖本夫等. 2018. 2017年九寨沟7.0级地震序列震源机制解和构造应力场特征. 地球学报, 39(5):622-634. 钱复业, 赵玉林, 余谋明等. 1982. 地震前地电阻率的异常变化. 中国科学 B辑, 12(9):831-839. 钱复业, 赵玉林, 刘婕等. 1990. 唐山7.8级地震地电阻率临震功率谱异常. 地震, (3):33-39. 钱家栋, 陈有发, 金安忠. 1985. 地电阻率法在地震预报中的应用. 北京:地震出版社. 钱家栋. 2010. 地震电磁学理论基础与观测技术. 北京:地震出版社. 钱家栋, 马钦忠, 李劭秾. 2013. 汶川MS8.0地震前成都台NE测线地电阻率异常的进一步研究. 地震学报, 35(1):4-17. 任俊杰, 徐锡伟, 张世民等. 2017. 东昆仑断裂带东端的构造转换与2017年九寨沟MS7.0地震孕震机制. 地球物理学报, 60(10):4027-4045, doi:10.6038/cjg20171029. 王新华, 祁贵仲, 赵玉林. 1984. 断层失稳前的扩展及电阻率前兆. 中国科学 B辑, 14(11):1026-1038. 汪志亮, 郑大林, 余素荣. 2002. 地震地电阻率前兆异常现象. 北京:地震出版社. 徐锡伟, 陈桂华, 王启欣等. 2017. 九寨沟地震发震断层属性及青藏高原东南缘现今应变状态讨论. 地球物理学报, 60(10):4018-4026, doi:10.6038/cjg20171028. 叶青, 杜学彬, 陈军营等. 2005. 2003年大姚和民乐-山丹地震1年尺度预测. 地震研究, 28(3):226-230. 易桂喜, 龙锋, 梁明剑等. 2017. 2017年8月8日九寨沟M7.0地震及余震震源机制解与发震构造分析. 地球物理学报, 60(10):4083-4097, doi:10.6038/cjg20171033. 张国民, 耿鲁明, 张永仙等. 1995. 构造块体的成组孕震模型和前兆场某些特征的分析. 地震学报, 17(1):1-10. 张培震, 邓启东, 张国民等. 2003. 中国大陆的强震活动与活动地块. 中国科学 (D辑), 33(S1):12-20. 赵玉林, 卢军, 张洪魁等. 2001. 电测量在中国地震预报中的应用. 地震地质, 23(2):277-285. 郑国磊, 杜学彬, 陈军营等. 2011. 断层构造对地震地电阻率异常的影响. 地震学报, 33(2):187-197. 朱涛. 2013. 汶川MS8.0地震前区域性地电阻率异常初步研究. 地震学报, 35(1):18-25.