孕震空区的环境应力特征及其机理探讨

Abstract

Abstract: In this paper, the ambient stress characteristics of seismogenic gap from several earthquake examples by using digital earthquake data are studied and its mechanism is discussed. It is indicated that the ambient stress approaching an earthquake is higher than that of usually small earthquakes (not near the focal zone of main earthquake) which form seismogenic gap at same period, and that the ambient stress of the small earthquakes near the focal zone of main earthquake is higher. The mechanism described above can be explained by the hard inclusion model. The conclusion of this research can be of great significance to improve forecast efficiency of seismogenic gap and increase the cognition of mechanic mechanism in the process of earthquake preparation.

Key words: Earthquake activity pattern, Seismogenic gap, Stress, Mechanism

CLC Number:

P315.7

LI Qiang, XU Ge, YANG Cai-xia. Research on ambient stress characteristics of seismogenic gap and its mechanism[J]. EARTHQUAKE, 2005, 25(3): 35-42.

References

[1] Dieterich J H. A model for the nucleation of earthquake slip, In Earthquake Source Mechanics[A]. AGU Geophys Mono 37 ( eds: S Das, J Boatwright and C Scholz) , Washington,D C,1986,37-47.
[2] Kanamori H, The nature of seismicity patterns before large earthquakes[A]. Earthquake Prediction-an international review ( eds: D W Simpson and P G Richards), Maurice Ewing Series (AGU 4), 1981, 1-19.
[3] Nur A, Dilatancy. Pore fluids and premonitory variations in ts/tp travel times[J]. Bull Seismol Soc Am, 1972, (62): 1217-1222.
[4] Mjachkin V, Brace W, Sobolev G, et al. Two models of earthquake forerunners[J]. PAGEOPH, 1975, (l13): 169-181.
[5] Rice J R, Rudnicki J W. Earthquake precursory effect due to pore fluid stabilization of a weakened fault zone[J]. J Geophys Res, 1979, (84): 2177-2184.
[6] Mogi K. Seismic activity and earthquake prediction, in proceedings of the symposium on Earthquake Prediction Research[M]. 1977, 203-214.
[7] Jones L M, Molnar P. Frequency of foreshocks[J]. Nature, 1976, (262): 677-679.
[8] Brune J N. Implications of earthquake triggering and rupture propagation for earthquake prediction based on premonitory phenomena[J]. J Geophys Res, 1979, (84): 2195-2198.
[9] 梅世蓉, 冯德益, 张国民, 等. 中国地震预报概论[M]. 北京: 地震出版社, 1993.
[10] Frankel A, Kanamori H. Determination of rupture duration and stress drop for earthquakes in Southern California[J]. Bull Seism Soc Amer, 1983, 73: 1527-1551.
[11] Boatwright J. A special theory for circular seismic sources, simple estimates of source dimension, dynamic stress drop and radiated seismic energy[J]. Bull Seism Soc Amer, 1980, 70: 1-28.
[12] 陈培善, 卓钰如, 金严, 等. 唐山地震前后京津唐张地区的应力场[J]. 地球物理学报, 1978, 21(1): 34-57.
[13] 陈培善, 刘祖荫, 阚荣举, 等. 由中小地震的震级M_L和M_S估算1970年通海地震前后其周围地区的剪应力值[J]. 地震学报, 1982 , 4(3): 228-230.
[14] 杨仕升. 广西地区中强地震前后环境应力场的时空演变特征[J]. 西北地震学报, 2003, 25(4): 326-330.
[15] 陈培善, Duda S J. 峰值速度和加速度对环境剪应力场面的依赖性[J]. 地球物理学报, 1993, 36(2): 185-194.
[16] 秦嘉政, 钱晓东, 张俊伟, 等. 武定地震序列剪应力场的时空分布特征[J]. 地震学报, 2000, 22(1): 9-15.
[17] 梅世蓉. 地震前兆场物理模式及前兆空间分布特征物理机制研究[A]. 中国地震局预测预防司. 大陆地震预报的方法和理论[C]. 北京: 地震出版社, 1998. 211-214.
[18] 张天中, 刘文龙, 姚栋华, 等. 地震波中提取的前兆指标[A]. 中国地震局监测预报司. 强地震中短期预报方法及其效能研究[C]. 北京: 地震出版社, 2002, 96-103.
[19] 陈培善, 陈海通. 由环境应力值寻找地震危险区的尝试[J]. 地震地磁观测与研究, 1992, 13(6), 1-11.

Research on ambient stress characteristics of seismogenic gap and its mechanism

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	GUAN Zhao-xuan, WAN Yong-ge, ZHOU Ming-yue, WANG Run-yan, SONG Ze-yao, HUANG Shao-hua, GU Pei-yuan. Seismogenic Fault Plane and Geodynamic Discussion of the 2024 Wushi M_S7.1 Earthquake, Xinjiang, China [J]. EARTHQUAKE, 2024, 44(2): 1-11.
[2]	JING Tao, Boonphor Phetphouthongdy, Chansouk Sioudom, LIU Yang-yang, LI Ji-geng, KANG Chun-li, MA Wei-yu. Analysis of Outgoing Longwave Radiation Changes before and after the Dengta M_S5.1 Earthquake Based on Tidal Additional Tectonic Stress [J]. EARTHQUAKE, 2024, 44(2): 52-62.
[3]	YANG Yan-ming, SU Shu-juan, WANG Lei. Determination of Rupture Direction and Seismogenic Structure of the 2020 Heerlinger M_L4.5 Earthquake in Hohhot, Inner Mongolia [J]. EARTHQUAKE, 2024, 44(2): 63-85.
[4]	WANG Hui, CAO Jian-ling, YAO Qi, SHI Yu-tao, LIU Yue. Two-dimensional Numerical Simulations of Effects of Static Stress Disturbance on Seismic Rupture Propagation Near Stepovers of Striking-slip Fault [J]. EARTHQUAKE, 2024, 44(2): 86-103.
[5]	SHU Tian-tian, LUO Yan, ZHU Yin-jie. The Source Rupture Process and the Strong Ground Motion Estimation of the 2022 M_S6.8 Earthquake in Luding, Sichuan [J]. EARTHQUAKE, 2024, 44(1): 19-36.
[6]	CHEN Guang-qi, WU Yan-qiang, XIA Ming-yao, LI Zhi-yuan. The Japan Noto Peninsula M7.6 Earthquake on January 1, 2024: Focal Characteristics, Disaster Situation and Emergency Response [J]. EARTHQUAKE, 2024, 44(1): 141-152.
[7]	YANG Yan-ming, SU Shu-juan. The 2023 Jishishan M_S6.2 Earthquake in Gansu Province, China: A Shallow Strong Earthquake with Thrust-dominated Components [J]. EARTHQUAKE, 2024, 44(1): 167-174.
[8]	WANG Run-yan, WAN Yong-ge, SONG Ze-yao, GUAN Zhao-xuan. Focal Mechanism and Stress Implication on the Surrounding Region of the Jishishan, Gansu M_S6.2 Earthquake on December 18, 2023 [J]. EARTHQUAKE, 2024, 44(1): 175-184.
[9]	WANG Qin-cai, LUO Jun, CHEN Han-lin, MENG Lin-xin. Focal Mechanism for the December 18, 2023, Jishishan M_S6.2 Earthquake in Gansu Province [J]. EARTHQUAKE, 2024, 44(1): 185-188.
[10]	TANG Jie, ZHANG Su-xin, FENG Xiang-dong, SUN Li-na, WANG Xiao-shan, BIAN Qing-kai. The Seismogenic Background of the 2020 Tangshan M5.1 Earthquake [J]. EARTHQUAKE, 2023, 43(4): 37-49.
[11]	XIN Jian-cun, FANG Wei, YANG Yi-hai, LI Na, YAN Wen-hua, FENG Hong-wu. Analysis on Variation of Geoelectric Field before M_S5.5 Earthquake in Aksai County, Jiuquan in 2021 [J]. EARTHQUAKE, 2023, 43(4): 153-168.
[12]	YANG Cheng, WAN Yong-ge. Study on Stress Field and Seismogenic Fault in Menyuan Area [J]. EARTHQUAKE, 2023, 43(3): 77-90.
[13]	CHEN Han-lin, LIU Rui-feng, WANG Qin-cai. Seismic Activity, Focal Mechanism Solution and Stress Field in the Jinping Ⅰ Reservoir and Its Surrounding Area before and after Impoundment [J]. EARTHQUAKE, 2023, 43(3): 120-137.
[14]	CUI Ren-sheng, CHEN Yang, ZHAO Cui-ping, LUO Jun. Design and Implementation of the Interactive Inversion Software for Focal Mechanism Solution [J]. EARTHQUAKE, 2023, 43(3): 190-202.
[15]	HE Kang, XIE Tao, WANG Yi-kun, LI Jun-hui, ZHENG Hai-gang. Analysis of Earth Resistivity Anomaly at Hefei Seismic Station before the 2011 Anqing M4.8 Earthquake [J]. EARTHQUAKE, 2023, 43(2): 72-84.