宁夏地区小震频谱偏移特征研究
A Study on the Spectrum Deviation Characteristics of Small Earthquakes in the Ningxia Region
摘要: 本文基于强震前的小震频谱偏移特征，系统研究了2009年以来宁夏吴忠灵武地区和海原–六盘山断裂带小震频谱特征，重点分析了2025年银川4.8级震群和2023年平川4.9级地震前震中区附近的小震频谱特征，结果表明吴忠灵武地区显著地震前存在较为明显的小震频谱偏移特征，与该区域前震显著的特征吻合；海原六盘山断裂显著地震前小震偏移特征不显著，与该区域孤立性地震为主的特征吻合。该结果为宁夏地区震例总结与震情短临跟踪提供参考依据。
Abstract: Based on the spectral shift characteristics of small earthquakes before strong seismic events, this paper systematically investigates the spectral features of small earthquakes in the Wuzhong-Lingwu area and the Haiyuan-Liupanshan Fault Zone in Ningxia since 2009. It focuses on analyzing the spectral characteristics of small earthquakes near the epicentral areas before the 2025 Yinchuan M4.8 earthquake swarm and the 2023 Pingchuan M4.9 earthquake. The results indicate that significant spectral shifts of small earthquakes are observed prior to notable seismic events in the Wuzhong-Lingwu area, consistent with the prominent foreshock characteristics of this region. In contrast, such spectral shifts are not significant before notable earthquakes in the Haiyuan-Liupanshan Fault Zone, aligning with the predominance of isolated seismic events in this area. These findings provide a reference for summarizing earthquake cases and short-term seismic tracking in the Ningxia region.
文章引用：罗恒之, 侯炳正. 宁夏地区小震频谱偏移特征研究[J]. 地球科学前沿, 2026, 16(2): 88-98. https://doi.org/10.12677/ag.2026.162009

参考文献

[1] 陈宇卫, 陆远忠. 我国某些六级以上地震前震的分析[J]. 地震, 1987(4): 5-11+38.
[2] 王林瑛, 陈佩燕, 吴忠良, 等. 前震特征及其识别研究[J]. 地震学报, 2005, 27(2): 171-177.
[3] Jones, L.M. and Molnar, P. (1979) Some Characteristics of Foreshocks and Their Possible Relationship to Earthquake Prediction and Premonitory Slip on Faults. Journal of Geophysical Research: Solid Earth, 84, 3596-3608. [Google Scholar] [CrossRef] 
[4] 朱传镇, 王琳瑛. 前震活动特征及其识别的研究(I) [J]. 地球物理学报, 1996, 39(1): 80-88.
[5] Bouchon, M., Durand, V., Marsan, D., Karabulut, H. and Schmittbuhl, J. (2013) The Long Precursory Phase of Most Large Interplate Earthquakes. Nature Geoscience, 6, 299-302. [Google Scholar] [CrossRef] 
[6] Scholz, C.H. (2002) The Mechanics of Earthquakes and Faulting. Cambridge University Press, 471.
[7] Kato, A., Obara, K., Igarashi, T., Tsuruoka, H., Nakagawa, S. and Hirata, N. (2012) Propagation of Slow Slip Leading up to the 2011 m w 9.0 Tohoku-Oki Earthquake. Science, 335, 705-708. [Google Scholar] [CrossRef] [PubMed]
[8] Chen, Y., Liu, J. and Ge, H. (1999) Pattern Characteristics of Foreshock Sequences. Pure and Applied Geophysics, 155, 395-408. [Google Scholar] [CrossRef] 
[9] 韩晓明, 刘芳, 张帆, 等. 2013年通辽MS5.3地震及其前震序列判定[J]. 中国地震, 2015, 31(2): 271-280.
[10] Li, L., Chen, Q., Cheng, X. and Niu, F. (2007) Spatial Clustering and Repeating of Seismic Events Observed along the 1976 Tangshan Fault, North China. Geophysical Research Letters, 34, L23309. [Google Scholar] [CrossRef] 
[11] 谭毅培, 邓莉, 曹井泉, 等. 2015年河北滦县震群发震机理分析[J]. 地球物理学报, 2016, 59(11): 4113-4125.
[12] 孙庆山, 李乐. 重复地震应用研究综述[J]. 地球物理学进展, 2018, 33(1): 84-93.
[13] 杨立明, 梅秀苹, 姜佳佳. 前震或广义前震识别的频谱偏移法及其应用研究[J]. 中国地震, 2015, 31(2): 188-197.
[14] 郑建常, 王鹏, 许崇涛, 等. 2014年于田MS7.3地震序列的频谱特征分析及其前震识别[J]. 中国地震, 2015, 31(2): 253-261.
[15] 杨立明. 西北地区地震短期综合预测方法研究[R]. “十五”国家科技攻关项目子专题结题报告, 2005.
[16] 张晓东. 强地震短期预测综合预报方法与方法[M]. 北京: 地震出版社, 2006.
[17] 杨立明. 汶川地震临震地脉动记录特殊频率波动现象及其重现性初步研究[J]. 国际地震动态, 2009(1): 14-19.
[18] 许英才, 曾宪伟. 吴忠-灵武地区地震活动性与强震危险性分析[J]. 地震科学进展, 2020, 50(10): 1-12.
[19] 任雪梅, 马禾青, 赵知军, 等. 宁夏及邻区5级以上地震前中等地震活动增强特征研究[J]. 西北地震学报, 2002(3): 76-81.
[20] 陈学忠, 李艳娥, 郭祥云. 2008年5月12日四川汶川8.0级地震前后震源区应力水平估计[J]. 国际地震动态, 2008(6): 1-3.
[21] 刘福田, 曲克信, 吴华, 等. 华北地区的地震层面成象[J]. 地球物理学报, 1986, 29(5): 442-449.
[22] 曾宪伟, 冯建刚, 吕俊强. 2003年民乐MS6.1地震前后Pg波速度横向变化特征[J]. 地球物理学进展, 2014, 29(4): 1601-1608.
[23] 曾宪伟, 冯建刚, 龙锋, 等. 鄂尔多斯西缘中上地壳Pg波速度成像研究[J]. 地震研究, 2017, 40(2): 176-185+333.
[24] 孙若昧, 刘福田. 京津塘地区地壳结构与强震的发生-I.P波速度结构[J]. 地球物理学报, 1995, 38(5): 599-607+694.
[25] 王椿镛, Mooney W D, 王溪莉, 等. 川滇地区地壳上地幔三维速度结构研究[J]. 地震学报, 2002, 24(1): 1-16.
[26] Zuñiga, F.R., Wyss, M. and Wilson, M.E. (1987) Apparent Stresses, Stress Drops, and Amplitude Ratios of Earthquakes Preceding and Following the 1975 Hawaiims 7.2 Main Shock. Bulletin of the Seismological Society of America, 77, 69-96. [Google Scholar] [CrossRef]