江西九江-瑞昌地震序列震源位置和发震构造再研究

doi:10.3969/j.issn.0253-4967.2016.02.009

摘要/Abstract

摘要：

选取江西九江-瑞昌M_S5.7地震序列2005年11月26日至2006年6月30日228次M_L≥1.0的地震，利用基于波形互相关技术的Hypodd定位方法进行了重新定位，最终获得224次地震的精确震源参数。统计定位误差（2倍标准偏差）在水平方向上为0.5km左右，垂直方向上<2km。重定位后地震序列的震源深度主要集中在8～14km，震中在NW和NE 2个方向展布，其中又以NW向条带地震居多。结合几个主要地震的震源机制解、地震序列展布方向和震区的构造背景，我们推断NW向断裂错动产生了M_S5.7主震，在右旋兼逆推过程中触发NE向断裂，产生了M_S4.8最大余震。NE向断裂的地震活动经过短时间应力调整后进入相对平静期，之后则是NW向断裂在长时间的应力释放过程中引发了一系列余震。M_S5.7主震的发震构造可能是NW向的洋鸡山-武山-通江岭隐伏断裂，而M_S4.8最大余震的发震构造可能是NE向的刘家-范家铺-城门山断裂。

关键词: 九江-瑞昌地震, Hypodd方法, 波形互相关, 发震构造

Abstract:

We collected seismic records of 228 M_L≥1.0 Jiujiang-Ruichang M_S5.7 earthquake sequence from Dec.26, 2005 to Jun. 30, 2006. By using double-difference method combined with waveform cross-correlation, those earthquakes were relocated and finally the accurate source parameters of 224 earthquakes were obtained. The errors are about 0. 5km in horizontal and less than 2km in vertical direction, respectively. It was found that the depth of earthquake sequence concentrates in 8~14km range, and the epicenters are distributed along both NW and NE direction, and dominantly along NW direction. Combined with the focal mechanism, the distribution direction and the tectonic setting, we infer that the rupture of the NW-trending fault caused the M_S5. 7 main shock, and then the rupture probably encountered an asperity and triggered the M_S4. 8 strong aftershock. The NE-trending fault came into a seismically quiet period by stress adjustment in a short time, while the NW-trending fault released stress for a long time which caused a series of aftershocks. The M_S5. 7 main shock is caused by the NW striking Yangjisshan-Wushan-Tongjiangling Fault and the M_S4. 8 aftershock occurred on the NE striking Liujia-Fanjiapu-Chengmenshan Fault.

Key words: Jiujiang-Ruichang earthquake, Hypodd method, waveform cross-correlation, seismogenic structure

中图分类号:

P315.2

罗丽, 吕坚, 曾文敬, 汤兰荣. 江西九江-瑞昌地震序列震源位置和发震构造再研究[J]. 地震地质, 2016, 38(2): 342-351.

LUO Li, Lü Jian, ZENG Wen-jing, TANG Lan-rong. RESTUDY ON HYPOCENTRAL LOCATION AND SEISMOGENIC TECTONIC OF THE JIUJIANG-RUICHANG M_S5.7 EARTHQUAKE SEQUENCE, JIANGXI PROVINCE[J]. SEISMOLOGY AND GEOLOGY, 2016, 38(2): 342-351.

参考文献

陈学忠, 吕坚, 王慧敏. 2008. 2005年11月26日江西九江-瑞昌M_S5.7地震序列的破裂过程研究［J］. 地震, 28(1):100-106. CHEN Xue-zhong, LV Jian, WANG Hui-min. 2008. Investigation on rupture process of the Jiujiang-Ruichang earthquake sequence of November 26, 2005［J］. Earthquake, 28(1):100-106(in Chinese).
崔学军. 2003. 赣江断裂特征及其与郯庐断裂接合关系［D］. 武汉:中国地质大学. 1-82. CUI Xue-jun. 2003. Characteristics of Ganjiang Fault and the junction between Ganjiang and Tanlu faults［D］. China University of Geosciences, Wuhan. 1-82(in Chinese).
黄浩, 付虹. 2014. 结合波形互相关的双差定位方法在2011年盈江地震序列中的应用［J］. 地震研究, 37(2):210-215. HUANG Hao, FU Hong. 2014. Application of double-difference relocation technique combined with waveform cross-correlation on Yingjiang earthquake sequence in 2011［J］. Journal of Seismological Research, 37(2):210-215(in Chinese).
黄媛. 2008. 结合波形互相关技术的双差算法在地震定位中的应用探讨［J］. 国际地震动态, 4:29-34. HUANG Yuan. 2008. Study on the application and development of the DD algorithm with cross correlation of waveform data in the earthquake location［J］. Recent Developments in World Seismology, 4:29-34(in Chinese).
李传友, 曾新福, 张剑玺. 2008. 2005年江西九江5.7级地震构造背景与发震构造［J］. 中国科学(D辑), 38(3):343-354. LI Chuan-you, ZENG Xin-fu, ZHANG Jian-xi. 2008. Seismogenic tectonic background and structures of 2005 M_S5.7 Jiujiang-Ruichang earthquake［J］. Science in China(Ser D), 38(3):343-354(in Chinese).
卢福水, 曾新福, 郑栋, 等. 2006. 九江-瑞昌5.7级地震发震构造初探［J］. 防灾减灾工程学报, 26(增刊):75-82. LU Fu-shui, ZENG Xin-fu, ZHENG Dong, et al. 2006. Study on the seismogenic structure of Jiujing-Ruichang M5.7 earthquake［J］. Journal of Disaster Prevention and Mitigation Engineering, 26(Suppl):75-82(in Chinese).
吕鹏, 丁志峰, 朱露培. 2011. 结合波形互相关的双差定位方法在2008年汶川地震余震序列中的应用［J］. 地震学报, 33(4):407-419. LV Peng, DING Zhi-feng, ZHU Lu-pei. 2011. Application of double-difference relocation technique to aftershocks of 2008 Wenchuan earthquake using waveform cross-correlation［J］. Acta Seismologica Sinica, 33(4):407-419(in Chinese).
吕坚, 倪四道, 沈小七, 等. 2007. 九江-瑞昌地震的精确定位及其发震构造初探［J］. 中国地震, 23(2):166-174. LV Jian, NI Si-dao, SHEN Xiao-qi, et al. 2007. Discussion on precise relocation and seismo-tectonics of the Jiujiang-Ruichang earthquake［J］. Earthquake Research in China, 23(2):166-174(in Chinese).
吕坚, 郑勇, 倪四道, 等. 2008. 2005年11月26日九江-瑞昌M_S5.7、M_S4.8地震的震源机制解与发震构造研究［J］. 地球物理学报, 51(1):158-164. LV Jian, ZHENG Yong, NI Si-dao, et al. 2008. Focal mechanisms and structures of the M_S5.7 and M_S4.8 Jiujiang-Ruichang earthquakes of Nov.26, 2005［J］. Chinese Journal of Geophysics, 51(1):158-164(in Chinese).
吕新彪, 姚书振, 周宗桂. 1997. 江西九瑞地区岩浆岩系统与成矿［J］. 华南地质与矿产, 19(1):27-36. LV Xin-biao, YAO Shu-zhen, ZHOU Zong-gui. 1997. Magmatic rock system and mineralization in Jiujiang-Ruichang region of Jiangxi［J］. Geology and Mineral Resources of South China, 19(1):27-36(in Chinese).
王椿镛, 丁志峰, 宋建立, 等. 1997b. 大别造山带地壳S波速度结构［J］. 地球物理学报, 40(3):337-346. WANG Chun-yong, DING Zhi-feng, SONG Jian-li, et al. 1997b. Shear wave velocity structure in Dabieshan orogenic belt［J］. Chinese Journal of Geophysics, 40(3):337-346(in Chinese).
王椿镛, 张先康, 陈步云, 等. 1997a. 大别造山带地壳结构研究［J］. 中国科学(D辑), 27(3):221-226. WANG Chun-yong, ZHANG Xian-kang, CHEN Bu-yun, et al. 1997a. Crustal structure in Dabieshan orogenic belt［J］. Science in China(Ser D), 27(3):221-226(in Chinese).
汪锐, 谭成轩, 安美建, 等. 2013. 结合波形互相关的双差定位在北京西北地区地震活动性研究中的应用［J］. 地学前缘, 20(4):115-124. WANG Rui, TAN Cheng-xuan, AN Mei-jian, et al. 2013. Application of double-difference relocation technique to seismic activity in the northwestern Beijing using waveform cross-correlation［J］. Earth Science Frontiers, 20(4):115-124(in Chinese).
杨中书, 曾文敬. 2007. 利用双差法对2005年江西九江-瑞昌5.7级地震序列重新定位［J］. 地震地磁观测与研究, 28(2):25-31. YANG Zhong-shu, ZENG Wen-jing. 2007. Relocation of the 26 Nov 2005 Jiujiang-Ruichang M5.7 earthquake sequence using the double-difference earthquake location algorithm［J］. Seismological and Geomagnetic Observation and Research, 28(2):25-31(in Chinese).
张小涛, 吕坚, 马光庆, 等. 2006. 九江-瑞昌地震序列的波速比特征研究［J］. 华北地震科学, 24(4):36-40. ZHANG Xiao-tao, LV Jian, MA Guang-qing, et al. 2006. Characteristics of V_p/V_s ratio in the series of Jiujiang-Ruichang earthquake［J］. North China Earthquake Sciences, 24(4):36-40(in Chinese).
Hauksson E, Shearer P. 2005. Southern California hypocenter relocation with waveform cross-correlation, part 1:Results using the double-difference method［J］. Bull Seism Soc Amer, 95(3):896-903.
Schweitzer J. 2001. HYPOSAT-An enhanced routine to locate seismic events［J］. Pure and Applied Geophysics, 158(1-2):277-289.
Waldhauser F, Ellsworth W L. 2000. A double difference earthquake location algorithm:Method and application to the Northern Hayward Fault, California［J］. Bull Seism Soc Amer, 90(6):1353-1368.
Waldhauser F, Sshaff D P. 2008. Large-scale relocation of two decades of northern California seismicity using cross-correlation and double-difference methods［J］. Translated World Seismology, 113(B8):4177-4183.

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