大地测量与地球动力学2025，Vol.45Issue(8)：829-833,5.DOI:10.14075/j.jgg.2024.08.388
2008年以来云南M≥5.0地震前震型地震序列特征分析
Characteristics of Foreshock-Type Seismic Sequence of M≥5.0 Earthquakes in Yunnan since 2008
摘要
Abstract
Utilizing the Yunnan small earthquake monthly catalog and seismic wave data recorded by the seismic network,we calculated the correlation coefficients of spectral amplitudes for Yunnan M≥5.0 earthquake sequences since 2008.A comprehensive analysis of traditional seismological pa-rameters,including the h and b values,for different types of earthquake sequences revealed that the correlation coefficients of spectral amplitudes for foreshock type seismic sequences are significantly higher than those for earthquake swarm and mainshock-aftershock type sequences.Moreover,the range of variation is relatively small,with values exhibiting a concentrated distribution.In contrast,traditional seismological parameters show a more concentrated b value and a wider distribution range for the h value.Analysis of the correlation coefficients of spectral amplitudes for 8 typical foreshock type earthquake sequences indicates a good correspondence between changes in the correlation coeffi-cients of spectral amplitude and the magnitude intensity of foreshock type earthquake sequences.The analysis suggests that a high correlation coefficient of spectral amplitude is indicative of high regional stress levels,and fluctuations in the correlation coefficient of spectral amplitude may be influenced by the loading and unloading of seismic stress.关键词
地震序列/谱振幅相关系数/地震学参数/b值/h值/前震Key words
earthquake sequence/correlation coefficient of spectral amplitude/seismology parameters/b value/h value/foreshock earthquake分类
天文与地球科学引用本文复制引用
张天宇,黄浩,刘自凤,匡泳庄,杨黎..2008年以来云南M≥5.0地震前震型地震序列特征分析[J].大地测量与地球动力学,2025,45(8):829-833,5.基金项目
云南省青年地震科学基金(2024K02) （2024K02）
云南省地震科技创新团队(CXTD202403). Youth Earthquake Science Foundation of Yunnan Province,No.2024K02 （CXTD202403）
Earthquake Science and Technology Inno-vation Team of Yunnan Province,No.CXTD202403. （）
