【摘要】 利用安徽及邻近地区的数字化地震资料,详细研究了“霍山地震窗口”小震序列的构造环境背景应力和视应力变化特征。结果表明,环境应力值和视应力值不仅能反映震“源”区的应力背景强弱,在距未来强震震中比较远的特殊构造部位,即素有“地震活动穴位”的地震窗口的小地震,同样能较客观反映出孕震区附近应力环境的信息,在华东中强地震前后应力状态的差异性是显著的。更多还原

【Abstract】 In this paper,the tectonic ambient shear stress and apparent stress varying characteristics of the small easthquake sequences in "Huoshan seismic window" was studied in detailed by using the digital earthquake data in Anhui Province and its adjacent region.The results indicate that the value of tectonic ambient shear stress and apparent stress not only reflects strong or weak stress background in earthquake source region but also the information of stress background around earthquake generating area in special tectonic position,namely the small earthquake in seismic window of "seismic activity point" farther from the future strong earthquake epicenter.The difference of the stress state is distinct before and after moderately strong earthquake in East China region.更多还原