Characteristics of precursor anomalies of earth resistivity at Yushu and Siping seismic stations of Jilin Province
-
摘要: 应用吉林省内榆树、 四平两个地电阻率台站观测资料， 采用形态法、 归一化变化速率法和各向异性度法， 分析研究了1999年汪清MS7.0深震以及2006年乾安—前郭MS5.0浅源地震前的地电阻率异常变化. 结果表明, 震前地电阻率出现长趋势下降变化或短临异常变化， 表现为： ① 汪清MS7.0深震前， 榆树台和四平台地电阻率月均值曲线上均显示出震前持续2年尺度的中期下降异常； ② 汪清MS7.0深震以及乾安—前郭MS5.0浅源中强震前， 榆树台和四平台地电阻率变化速率均大于异常指标； ③ 乾安—前郭MS5.0地震前， 四平台地电阻率各向异性度曲线显示出明显的低值异常变化， 而榆树台各向异性度S曲线则出现破年变变化. 上述异常变化的原因可能为， 太平洋板块向NW方向挤压， 导致震源区及附近最大主压应力方位(或近于该方位)NW向的挤压作用突出， 引起介质内部导电流体快速进入或重新分布， 从而使地电阻率出现长趋势下降变化和各向异性变化.Abstract: This paper studies the anomalous changes of earth resistivity before 1999 Wangqing MS7.0 earthquake and 2006 Qian’an-Qianguo MS5.0 earthquake observed at Yushu and Siping stations of Jilin Province. The results show that, at the Yushu and Siping stations a long-trend decreasing or short-impending anomaly of earth resistivity appeared before the two earthquakes. Monthly mean curves of earth resistivity displayed two-year decrease anomalies at Yushu and Siping stations before the Wangqing earthquake. Before Wangqing and Qian’an-Qianguo earthquakes, normalized variation rates of earth resistivity are larger than anomaly index at Yushu and Siping stations. Before Qian’an-Qianguo earthquake, earth resistivity anisotropy degree showed obviously low value anomaly at Siping station, and at Yushu station it broke its annual variation value. Possible reasons for the anomalous changes maybe are related to the maximum principal compressive stress orientation’s (or close to the range) compressing NWwards in the source region and its vicinity resulting from NWwards extrusion of Pacific Plate, which makes the conductive fluid in the media quickly enter or redistribute, so that the earth resistivity shows a long-trend decrease and anisotropic variation.
-
-
![]()
图 1 吉林省地电阻率台站与震中分布图
Figure 1. Distribution of earth resistivity observation stations and epicenters of Jilin Province
![]()
图 2 榆树台和四平台地电阻率月均值曲线
Figure 2. The curves of monthly mean values of earth resistivity recorded at Yushu and Siping stations
![]()
图 3 1997—2002年榆树台和四平台地电阻率归一化变化速率曲线
Figure 3. The curves of normalized variation rate of earth resistivity at Yushu and Siping stations in 1997—2002
![]()
图 4 2003—2011年榆树台和四平台地电阻率归一化变化速率曲线
Figure 4. The curves of normalized variation rate of earth resistivity at Yushu and Siping stations in 2003—2011
![]()
图 5 2004—2009年四平台电阻率月均值曲线及各向异性度(S)曲线
Figure 5. The curves of monthly mean and anisotropy degree (S) of earth resistivity at Siping station in 2004—2009
![]()
图 6 2004—2009年榆树台电阻率月均值曲线及其各向异性度(S)曲线
Figure 6. The curves of monthly mean and anisotropy degree (S) of earth resistivity at Yushu station in 2004—2009
表 1 吉林省地电阻率震兆异常统计
Table 1 The statistics on precursor anomalies of earth resistivity in Jilin Province
下载: 导出CSV
-
杜学彬. 2010. 在地震预报中的两类视电阻率变化[J]. 中国科学: 地球科学, 40(10): 1321-1330. Du X B. 2010. Two types of changes in apparent resistivity in earthquake prediction[J]. Science China: Earth Sciences, 40(10): 1321-1330 (in Chinese).
杜学彬, 任广军, 薛顺章. 1999. 中国大陆多种前兆异常研究及强震的尝试性预测[J]. 西北地震学报, 21(2): 113-122. Du X B, Ren G J, Xue S Z. 1999. Study on many kinds of precursory anomalies and trial prediction of strong earthquakes in the continent of China[J]. Northwestern Seismological Journal, 21(2): 113-122 (in Chinese).
杜学彬, 薛顺章, 郝臻, 张世中. 2000. 地电阻率中短期异常与地震的关系[J]. 地震学报, 22(4): 368-376. Du X B, Xue S Z, Hao Z, Zhang S Z. 2000. On the relation of moderate-short term anomaly of earth resistivity to earthquake[J]. Acta Seismologica Sinica, 22(4): 368-376 (in Chinese).
杜学彬, 阮爱国, 范世宏, 郝臻. 2001. 强震近震中区地电阻率变化速率的各向异性[J]. 地震学报, 23(3): 289-297. Du X B, Ruan A G, Fan S H, Hao Z. 2001. Anisotropy of the variation rate of apparent resistivity near the epicentral region of strong earthquakes[J]. Acta Seismologica Sinica, 23(3): 289-297 (in Chinese).
杜学彬, 赵家骝, 谭大诚, 席继楼, 钱家栋, 卢军, 唐宇雄, 康好林, 陆阳泉, 陈有发, 王得志. 2006. 地震台站建设规范: 地电台站(第1部分): 地电阻率台站(DB/T 18.1-2006)[S]. 北京: 地震出版社: 2-3, 9-12. Du X B, Zhao J L, Tan D C, Xi J L, Qian J D, Lu J, Tang Y X, Kang H L, Lu Y Q, Chen Y F, Wang D Z. 2006. Specification for the Construction of Seismic Station: Geoelectrical Station, Part 1: Geoelctrical Resistivity Observatory (DB/T 18.1-2006)[S]. Beijing: Seismological Press: 2-3, 9-12 (in Chinese).
杜学彬, 李宁, 叶青, 马占虎, 闫睿. 2007. 强地震附近视电阻率各向异性变化的原因[J]. 地球物理学报, 50(6): 1802-1810. Du X B, Li N, Ye Q, Ma Z H, Yan R. 2007. Possible reason for the anisotropic changes in apparent resistivity near the focal region of strong earthquake[J]. Chinese Journal of Geophysics, 50(6): 1802-1810 (in Chinese).
冯志生, 杨建军, 梅卫萍, 耿杰, 汪雪泉, 刘义高. 2004. 华东地区地电阻率各向异性度的地震前兆异常特征初步研究[J]. 地震学报, 26(2): 223-227. Feng Z S, Yang J J, Mei W P, Geng J, Wang X Q, Liu Y G. 2004. Preliminary study on characteristics of seismic precursor of earth resistivity anisotropy degree in East China[J]. Acta Seismologica Sinica, 26(2): 223-227 (in Chinese).
关华平, 张学民, 李美. 2008. 汶川地震前的地电阻率异常分析[J]. 国际地震动态, (11): 144. Guan H P, Zhang X M, Li M. 2008. Study on geo-resistivity anomaly before Wenchuan earthquake[J]. Recent Developments in World Seismology, (11): 144 (in Chinese).
吉林省地震局. 2005. 吉林省地震监测志[M]. 北京: 地震出版社: 75-85, 128-135, 138-148. Earthquake Administration of Jilin Province. 2005. Seismic Monitoring Annals of Jilin Province[M]. Beijing: Seismological Press: 75-85, 128-135, 138-148 (in Chinese).
陆阳泉, 刘建毅, 梁子斌. 1998. 岩石电学性质的实验研究概述[G]//地震地电学发展与展望. 兰州: 兰州大学出版社: 32-34. Lu Y Q, Liu J Y, Liang Z B. 1998. Overview of experimental studies on the electrical property of rocks[G]//Development and Prospect of Seismic Geoelectricity. Lanzhou: Lanzhou University Press: 32-34 (in Chinese).
吕政. 2003. 吉林省汪清两次深源地震的研究[J]. 东北地震研究, 19(4): 1-8. Lü Z. 2003. Research on the two deep earthquakes in Jilin Province[J]. Seismological Research of Northeast China, 19(4): 1-8 (in Chinese).
毛桐恩, 王铁城. 1995. 唐山地震地电阻率各向异性变化特征研究[J]. 地震学报, 17(4): 505-510. Mao T E, Wang T C. 1995. Variations of ground resistivity anisotropy during the Tangshan earthquake[J]. Acta Seismologica Sinica, 17(4): 505-510 (in Chinese).
毛桐恩, 陈大元, 刘新美, 余素荣, 宋大捷. 1998. 承载岩石地电阻率各向异性变化的实验研究与现场观测结果[J]. 地震, 18(S1): 33-38. Mao T E, Chen D Y, Liu X M, Yu S R, Song D J. 1998. Experimental research on change of georesistivity anisotropy of pressed rocks and on the spot observation[J]. Earthquake, 18(S1): 33-38 (in Chinese).
毛桐恩, 胥广银, 范思源, 赵明, 孙景芳. 1999. 地电阻率各向异性度的动态演化图像与地震孕育过程[J]. 地震学报, 21(2): 180-186. Mao T E, Xu G Y, Fan S Y, Zhao M, Sun J F. 1999. Dynamic evolution patterns of ground resistivity anisotropy and the seismogenic process[J]. Acta Seismologica Sinica, 21(2): 180-186 (in Chinese).
孟宪森, 朱景春, 孙文斌, 许学礼, 李登恒. 1996. 东北地区浅源中强震及深震与西太平洋板块俯冲[J]. 东北地震研究, 12(2): 12-23. Meng X S, Zhu J C, Sun W B, Xu X L, Li D H. 1996. Shallow moderate and deep earthquake in Northeast China and Western Pacific Plate subduction[J]. Seismological Research of Northeast China, 12(2): 12-23 (in Chinese).
钱复业, 赵玉林. 1980. 地震前地电阻率变化十例[J]. 地震学报, 2(2): 186-197. Qian F Y, Zhao Y L. 1980. Ten examples of changes in earth-resistivity prior to strong earthquakes[J]. Acta Seismologica Sinica, 2(2): 186-197 (in Chinese).
钱复业, 赵玉林. 1998. 地电阻率的各向异性地震前兆及其在探索震中区域应力场分布中的应用[G]//地震地电学发展与展望. 兰州: 兰州大学出版社: 64-69. Qian F Y, Zhao Y L. 1998. Precursory of anisotropy of earth resistivity and its application to exploring distribution of regional stress field in the epicenter region[G]//Development and Prospect of Seismic Geoelectricity. Lanzhou: Lanzhou University Press: 64-69 (in Chinese).
钱家栋. 1993. 与大震孕育过程有关的地电阻率变化研究[J].中国地震, 9(4): 341-350. Qian J D. 1993. A study on the changes in geoelectrical resistivity associated with preparatory process of great earthquakes in China[J]. Earthquake Research in China, 9(4): 341-350 (in Chinese).
阮爱国, 卢军, 符琼玉, 吴振利. 2004. 两次大震的视电阻率各向异性特征[J]. 华南地震, 24(4): 1-7. Ruan A G, Lu J, Fu Q Y, Wu Z L. 2004. Anisotropic characteristics of earth apparent resistivity during the two strong earthquakes[J]. South China Journal of Seismology, 24(4): 1-7 (in Chinese).
史红军, 赵卫星, 庞晶源. 2008. 吉林汪清深源地震前榆树地震台地电阻率异常分析[J]. 地震研究, 31(3): 233-237. Shi H J, Zhao W X, Pang J Y. 2008. Earth resistivity anomalies observed at Yushu Seismic Station before Wangqing deep earthquakes[J]. Journal of Seismological Research, 31(3): 233-237 (in Chinese).
史红军, 赵卫星, 张振文, 杨柳. 2011. 榆树地电阻率台观测效能评价[J]. 防灾减灾学报, 27(1): 57-64. Shi H J, Zhao W X, Zhang Z W, Yang L. 2011. Assessment on the observation efficiency of Yushu earth resistivity station[J]. Journal of Disaster Prevention and Reduction, 27(1): 57-64 (in Chinese).
汪志亮, 王志贤, 余素荣. 1995. 地电前兆异常特征及澜沧-耿马7.6级等地震预报问题[J]. 地震, 25(3): 240-245. Wang Z L, Wang Z X, Yu S R. 1995. Features of anomalous precursors and prediction of Lancang-Gengma earthquake with M=7.6 and other events[J]. Earthquake, 25(3): 240-245 (in Chinese).
张继红, 赵国泽, 王晋生, 唐廷梅, 齐丽杰. 2010. 2008年汶川MS8.0地震与青岛台地电阻率异常变化关系[J]. 地震地质, 32(3): 409-416. Zhang J H, Zhao G Z, Wang J S, Tang T M, Qi L J. 2010. Preliminary study on the relationship between the MS8.0 Wenchuan earthquake of 2008 and the anomalies of earth resistivity observed at Qingdao seismic station[J]. Seismology and Geology, 32(3): 409-416 (in Chinese).
张立敏, 唐晓明. 1983. 西太平洋板块俯冲运动与中国东北深震带[J]. 地球物理学报, 26(4): 331-340. Zhang L M, Tang X M. 1983. The underthrusting movement of the Western Pacific Plate and the deep focus earthquake zone of Northeast China[J]. Chinese Journal of Geophysics, 26(4): 331-340 (in Chinese).
张学民, 李美, 关华平. 2009. 汶川8.0级地震前的地电阻率异常分析[J]. 地震, 29(1): 108-115. Zhang X M, Li M, Guan H P. 2009. Anomaly analysis of earth resistivity observations before the Wenchuan earthquake[J]. Earthquake, 29(1): 108-115 (in Chinese).
赵玉林, 钱复业. 1978. 唐山7.8级强震前震中周围形变电阻率的下降异常[J]. 地球物理学报, 21(3): 181-190. Zhao Y L, Qian F Y. 1978. Electrical resistivity anomaly observed in and around the epicentral area prior to the Tang-shan earthquake of 1976[J]. Acta Geophysica Sinica, 21(3): 181-190 (in Chinese).
中国地震局. 2001. 地震及前兆数字观测技术规范: 电磁观测(试行)[M]. 北京: 地震出版社: 3-6, 19-36. China Earthquake Administration. 2001. Technical Specification for Digital Observation of Earthquakes and Precursors: Electromagnetic Observation (For Trial Implementation)[M]. Beijing: Seismological Press: 3-6, 19-36 (in Chinese).
Qian J D, Gui X T, Lu Y Q. 1996. Review on the observation and experiment in earthquake prediction by using geoelectrical methods[G]//The Selected Papers of Earthquake Prediction in China. Beijing: Seismological Press: 170.
计量
- 文章访问数: 673
- HTML全文浏览量: 278
- PDF下载量: 22
