【摘要】 系统分析了1900年以来新疆及周边6级以上地震成组活动基本特征。结果表明,新疆及周边地区6级以上地震成组活动明显,并具有持续时间短、地震强度大、频度高的特点。新疆及周边地区7级以上地震有95%发生在地震成组活动期间,地震成组活动是该区域发生7级以上强震的中期预测指标之一。地震成组活动一般出现在低活动水平背景下,而且成组地震活动在空间上相对集中分布,在地震活动期间强震存在由新疆西南向北东迁移的特点,其中天山地震带尤其是南天山西段为强震主要的活动区域。地震成组活动伴随地震条带图像的出现;在地震成组活动前或活动中新疆地区前兆测项异常明显增加,具有群体异常的起伏变化过程。更多还原

【Abstract】 In this paper,we have analyzed systematically the characteristics of seismic activity with the magnitude greater than 6 in Xinjiang and its adjacent area.It shows that the activity has clearly grouping characteristics,and the duration time is short,the intensity and frequency is high.The 95% earthquakes with magnitude greater than 7 in Xinjiang and its adjacent area occurred during the grouping seismic activity period,and the grouping seismic activity is also the index of medium-term prediction.The grouping seismic activity with the magnitude greater than 6 occurred commonly with a weak background of seismic activity,and the area where the grouping seismic activity was relatively centralized,the strong earthquake focus moved form southwest to northeast in Xinjiang.The Tianshan seismic belt is the main area of grouping seismic activity,especially the western part of south Tianshan,and is associated with the seismic bands,the clear increase of the precursor anomaly,and the grouping anomaly shows a changeable course.更多还原