川滇地区中小地震应力降特征及趋势分析

doi:10.12196/j.issn.1000-3274.2024.04.001

Abstract

Abstract: In this study, 8071 focal parameters of small and moderate earthquakes from January 2019 to December 2023 in the Sichuan-Yunnan region were calculated. The temporal and spatial variation trends of stress drop in the focal areas of the May 21, 2021 Yangbi M_S6.4 earthquake, the September 5, 2022 Luding M_S6.8 earthquake, and key observation areas (Longmenshan fault zone and the intersection area of the Honghe fault and Xiaojiang fault) were analyzed. According to the variation trends of stress drop, significant precursor changes were observed in the 2021 Yangbi M_S6.4 focal area one year before the earthquake. The stress drop time series of the 2022 Luding M_S6.8 earthquake shows a rapid rise and decline in the short term after the main earthquake; meanwhile, the stress drop has no obvious upward trends at present. The stress drops in the intersection area of the Honghe fault and Xiaojiang fault at the southern end of the Sichuan-Yunnan rhombohedral block and the northeast section of the Longmenshan fault zone are relatively high. Consequently, the future risk of strong earthquakes deserves attention, and the stress drop changes in these two areas should be continuously observed.

Key words: Sichuan-Yunnan region, Source parameter, Stress drop, The 2021 Yangbi earthquake, The 2022 Luding earthquake

CLC Number:

P315.3

ZHENG Xian, ZHAO Cui-ping, WU Wei-wei, YANG Jing-qiong. Characteristics and Trend Analysis of Stress Drop in Small and Moderate Earthquakes in the Sichuan-Yunnan Region[J]. EARTHQUAKE, 2024, 44(4): 1-13.

References

[1] 陈运泰, 吴忠良, 王培德, 等. 数字地震学[M]. 北京: 地震出版社, 2000.
CHEN Yun-tai, WU Zhong-liang, WANG Pei-de, et al. Digital seismology[M]. Beijing: Seismological Press, 2000 (in Chinese).
[2] Allmann B P, Shearer P M. Spatial and temporal stress drop variations in small earthquakes near Parkfield, California[J]. Journal of Geophysical Research: Solid Earth, 2007, 112(B4): B04305.
[3] Hardebeck J L, Aron A. Earthquake stress drops and inferred fault strength on the Hayward fault, east San Francisco Bay, California[J]. Bulletin of the Seismological Society of America, 2009, 99(3): 1801-1814.
[4] 华卫, 陈章立, 郑斯华. 2008年汶川8.0级地震序列震源参数分段特征的研究[J]. 地球物理学报, 2009, 52(2): 365-371.
HUA Wei, CHEN Zhang-li, ZHENG Si-hua. A study on segmentation characteristics of aftershock source parameters of Wenchuan M8.0 earthquake in 2008[J]. Chinese Journal of Geophysics, 2009, 52(2): 365-371 (in Chinese).
[5] 赵翠萍, 陈章立, 华卫, 等. 中国大陆主要地震活动区中小地震震源参数研究[J]. 地球物理学报, 2011, 54(6): 1478-1489.
ZHAO Cui-ping, CHEN Zhang-li, HUA Wei, et al. Study on source parameters of small to moderate earthquakes in the main seismic active regions, China mainland [J]. Chinese Journal of Geophysics, 2011, 54(6): 1478-1489 (in Chinese).
[6] 唐兰兰, 李志海. 新疆天山中东段地区地震波衰减、场地响应及震源参数研究[J]. 地震学报, 2011, 33(2): 134-142.
TANG Lan-lan, LI Zhi-hai. Ground motion attenuation, site response and source parameters of earthquakes in middle and eastern range of Tianshan Mountain, Xinjiang of China[J]. Acta Seismologica Sinica, 2011, 33(2): 134-142 (in Chinese).
[7] 吴微微, 苏金蓉, 魏娅玲, 等. 四川地区介质衰减、场地响应与震级测定的讨论[J]. 地震地质, 2016, 38(4): 1005-1018.
WU Wei-wei, SU Jin-rong, WEI Ya-ling, et al. Discussion on attenuation characteristics, site response and magnitude determination in Sichuan[J]. Seismology and Geology, 2016, 38(4): 1005-1018 (in Chinese).
[8] 吴微微, 吴朋, 魏娅玲, 等. 川滇活动块体中-北部主要活动断裂带现今应力状态的分区特征[J]. 地球物理学报, 2017, 60(5): 1735-1745.
WU Wei-wei, WU Peng, WEI Ya-ling, et al. Regional characteristics of stress state of main seismic active faults in mid-northern part of Sichuan-Yunnan block[J]. Chinese Journal of Geophysics, 2017, 60(5): 1735-1745 (in Chinese).
[9] Brune J N. Tectonic stress and the spectra of seismic shear waves from earthquakes[J]. Journal of Geophysical Research, 1970, 75(26): 4997-5009.
[10] 段梦乔, 赵翠萍, 周连庆, 等. 2021年5月21日云南漾濞M_S6.4地震序列发震构造[J]. 地球物理学报, 2021, 64(9): 3111-3125.
DUAN Meng-qiao, ZHAO Cui-ping, ZHOU Lian-qing, et al. Seismogenic structure of the 21 May 2021 M_S6.4 Yunnan Yangbi earthquake sequence[J]. Chinese Journal of Geophysics, 2021, 64(9): 3111-3125 (in Chinese).
[11] 雷兴林, 王志伟, 马胜利, 等. 关于2021年5月滇西漾濞M_S6.4地震序列特征及成因的初步研究[J]. 地震学报, 2021, 43(3): 261-286.
LEI Xing-lin, WANG Zhi-wei, MA Sheng-li, et al. A preliminary study on the characteristics and mechanism of the May 2021 M_S6.4 Yangbi earthquake sequence, Yunnan, China[J]. Acta Seismologica Sinica, 2021, 43(3): 261-286 (in Chinese).
[12] 易桂喜, 龙锋, 梁明剑, 等. 2022年9月5日四川泸定M_S6.8地震序列发震构造[J]. 地球物理学报, 2023, 66(4): 1363-1384.
YI Gui-xi, LONG Feng, LIANG Ming-jian, et al. Seismogenic structure of the 5 September 2022 Sichuan Luding M_S6.8 earthquake sequence[J]. Chinese Journal of Geophysics, 2023, 66(4): 1363-1384 (in Chinese).
[13] 戴丹青, 孙丽, 杨志高. 2022年9月5日四川泸定M_W6.6地震破裂过程研究[J]. 地震地磁观测与研究, 2022, 43(5): 186-192.
DAI Dan-qing, SUN Li, YANG Zhi-gao. Rupture process of the 5 September 2022 M_W6.6 Luding earthquake in Sichuan[J]. Seismological and Geomagnetic Observation and Research, 2022, 43(5): 186-192 (in Chinese).
[14] 尹凤玲, 蒋长胜, 韩立波, 等. 红河断裂带库仑应力演化及未来地震危险性估计[J]. 地球物理学报, 2018, 61(1): 183-198.
YIN Feng-ling, JIANG Chang-sheng, HAN Li-bo, et al. Seismic hazard assessment for the Red River fault: Insight from Coulomb stress evolution[J]. Chinese Journal of Geophysics, 2018, 61(1): 183-198 (in Chinese).
[15] 叶建庆, 张建国, 杨晶琼, 等. 红河断裂带两侧块体地震震源参数研究[J]. 地震研究, 2007, 30(3): 241-247.
YE Jian-qing, ZHANG Jian-guo, YANG Jing-qiong, et al. Source parameters of blocks beside Honghe fault zone[J]. Journal of Seismological Research, 2007, 30(3): 241-247 (in Chinese).
[16] 王茗册. 云南地区强震应力触发及未来地震活动性研究[D]. 武汉: 武汉大学, 2022.
WANG Ming-ce. Stress triggering interaction among the large earthquakes and risk of future seismicity in Yunnan[D]. Wuhan: Wuhan University, 2022 (in Chinese).
[17] 薛晨, 徐克科, 刘新奇, 等. GNSS约束的红河断裂带现今三维闭锁耦合程度及时空演变特征研究[J]. 大地测量与地球动力学, 2024, 44(1): 63-68+104.
XUE Chen, XU Ke-ke, LIU Xin-qi, et al. Time-space evolution of the current three-dimensional fault locking of the Red River fault zone constrained by GNSS[J]. Journal of Geodesy and Geodynamics, 2024, 44(1): 63-68+104 (in Chinese).
[18] 黄勇, 孟国杰, 吴伟伟, 等. 基于GNSS的红河断裂中段现今变形特征[J]. 大地测量与地球动力学, 2024, 44(1): 57-62.
HUANG Yong, MENG Guo-jie, WU Wei-wei, et al. Present-day deformation characteristics of the central segment of the Red River fault based on GNSS[J]. Journal of Geodesy and Geodynamics, 2024, 44(1): 57-62 (in Chinese).

Characteristics and Trend Analysis of Stress Drop in Small and Moderate Earthquakes in the Sichuan-Yunnan Region

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	WANG Li-wei, WANG Hui, CAO Jian-ling, YAO Qi. Seismicity Related to Coulomb Stress Transfer Model and Rate-state Friction Criterion: A Case Study in the Sichuan-Yunnan Region [J]. EARTHQUAKE, 2024, 44(4): 26-44.
[2]	GUO Xue-qi, WANG Yi, HE Xiao-hui, LUO Yan, ZHENG Kai-yue. Research on the Influence of Velocity Model Uncertainty on Source Parameter Waveform Inversion Based on Numerical Experiments [J]. EARTHQUAKE, 2024, 44(4): 131-152.
[3]	ZHANG Rong-xin, XING Hui-lin, SHU Tao, LIU Jun-biao, GUO Zhi-wei, WANG Jian-chao, TAN Yu-yang. 3D Mesh for the Fault System in China Seismic Experimental Site [J]. EARTHQUAKE, 2023, 43(3): 18-33.
[4]	ZHANG Zheng-shuai, ZHOU Chen, ZHENG Jian-chang, LIU Cheng-yu. Inversion of Seismic-Source Spectral Parameters and Characteristics of the Source Parameters for Changdao Swarm [J]. EARTHQUAKE, 2022, 42(1): 85-98.
[5]	XU Wei-min, CHEN Shi, RUAN Ming-ming, YANG Jin-ling, HAN Jian-cheng, LI Hong-lei, LU Hong-yan. Evaluation of Field Source Resolution of Terrestrial Mobile Gravity Network in Sichuan-Yunnan Region [J]. EARTHQUAKE, 2021, 41(1): 191-204.
[6]	ZHENG Qiu-yue, CHEN Shi, LI Xiao-yi, XU Wei-min. Model Testing and Forward Modeling of Regional Micro-gravity Changes based on Known Field-source Parameters [J]. EARTHQUAKE, 2016, 36(4): 186-195.
[7]	WANG Jun, SHAO Zhi-gang, SUN Xiao-long, WANG Yi-xi, XIANG yang, WANG Xi-long. A Prerliminary Study of Subsurface Fluid Precursors and Prediction Index before Strong Earthquakesin Sichuan-Yunnan region [J]. EARTHQUAKE, 2016, 36(4): 109-119.
[8]	LIU Yue, LU Xiao-jian, TIAN Qin-jian. Analysis of Seismicity Changes prior to Strong Earthquakes in Sichuan-Yunnan Region by the Region-Time-Length Algorithm [J]. EARTHQUAKE, 2016, 36(2): 94-104.
[9]	PAN Ying, ZHANG Xiao-dong, FU Hong. Seismic Activity and Source Parameters in the Nuozhadu Reservoir Region, Yunna Province [J]. EARTHQUAKE, 2015, 35(3): 31-43.
[10]	LI Yan-e, CHEN Li-juan, WANG Sheng-wen, GUO Xiang-yun, CHEN Xue-zhong. Temporal and Spatial Variations of Apparent Stress in Shandong Province, China [J]. EARTHQUAKE, 2015, 35(2): 80-90.
[11]	HE Kang, YAN Rui, WANG Chun, ZHENG Hai-gang, LI Jun-hui, FANG Zhen. Extracting Geomagnetic Precursory Anomaly based on Wigner-Ville Distribution and Application in the Sichuan- Yunnan Region [J]. EARTHQUAKE, 2014, 34(4): 88-99.
[12]	WANG Peng, ZHENG Jian-chang. Temporal and Spatial Variation of Apparent Stress in Eastern Shandong Province [J]. EARTHQUAKE, 2014, 34(4): 70-77.
[13]	DENG Fei, LIU Jie. Source Parameters and Correlation Coefficients of Focal Mechanisms for the 2008 Yingjiang Earthquake Sequence [J]. EARTHQUAKE, 2014, 34(2): 22-34.
[14]	LIU Jian-ming, LI Zhi-hai. Non-elastic Attenuation, Site Response and Source Parameters in the Northern Tianshan Mountain, Xinjiang of China [J]. EARTHQUAKE, 2014, 34(1): 77-86.
[15]	CHEN Zhang-li, CHEN Han-lin, ZHAO Cui-ping, WANG Qin-cai, HUA Wei, ZHOU Lian-qing. Measuring the Earthquake Size [J]. EARTHQUAKE, 2014, 34(1): 1-12.