不同地震序列类型地震的特征性质研究

收集整理了1993年以来的地震资料,建立M5地震和M6地震两个样本组,选取发震断层、震源复杂性、视应力3个参数,使用模糊等价关系的聚类分析方法对地震进行分类,把具有相同性质的地震归为同一类,研究孤立型、主余型、多震型地震的某些特征性质。结果表明:1孤立型地震性质:震源错动方式简单,应力降高或很高,视应力低或很低,震源区介质非均匀程度低;2多震型地震性质:对于走滑断层地震,震源错动方式复杂,应力降低或很低,视应力偏高或很高,震源区介质非均匀程度较高。

Research on Characteristic of Different Types of Earthquake Sequence

The collected data of earthquakes since 1993 are divided into two sample groups of grade 5 and grade 6 respectively. Based on the cluster analysis method of fuzzy equivalence relation, these earthquakes are classified into different classes according to three parameters, i.e., earthquake fault, earthquake source complexity and apparent stress, and the characteristics of isolated earthquake, main shock-after shock earthquake and multiple earthquake are studied. It can be concluded: 1) isolated earthquake features simple earthquake dislocation mode, high or very high stress drop, low or very low apparent stress and low heterogeneous level of medium in earthquake source region; 2) multiple earthquake (strike-slip) features complex earthquake dislocation mode, low or very low stress drop, high or very high apparent stress and high heterogeneous level of medium in earthquake source region.