青海昆仑山口西8.1级地震时空强有序特征探讨

DISCUSSION ON THE FEATURE OF STRONG EARTHQUAKE DISTRIBUTION IN TIME,SPACE AND MAGNITUDE ORDER BEFORE KUNLUNSHAN 8.1 EARTHQUAKE

通过对 2 0 0 1年 11月 14日昆仑山口西 8.1级地震的时间、空间、强度和触发特征的分析和初步研究认为 ,昆仑山口西 8.1级地震在时间上具备时间节律的特征 ,符合 8级地震 2 4年左右和 7级以上地震 7年左右的时间节律关系 ;在空间上存在地震活动等间距、地震集中活动、共轭条带等特征 ;在强度上符合节律特征 ,并存在明显地受地球自转 ,以及月亮、太阳的调制和触发作用 .最后 ,对巨大地震孕震和发震的条件进行了讨论 .

In this paper, the feature of strong earthquake distribution in time, space and magnitude order is preliminarily studied. The modulation and triggering factors such as earth rotation, earth and sun tides are also analyzed. The results show that: giant earthquakes with magnitude more than 8 occurred about every 24 years in Chinese mainland; for earthquakes with magnitude more than 7, the duration between each two earthquakes is about 7 years. The Kunlunshan M 8.1 earthquake exactly occurred at the expected time point. The spatial distribution shows the feature that major earthquakes occurred along two conjugate belts. The earthquakes occurred concentrated and the distances between each two swarms are approximately the same. The earth rotation, earth tide, sun tide and sun magnetic field also played roles of modulation and triggering factors. At last, the conditions of earthquake generation and occurrence are also discussed.