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本文讨论了川滇地活动震的时空分布特征。研究表明:(1)从8世纪来,本区经历了两个较完整的地震活动时期。(2)在两个活动时期至,大震呈现不同的空间格局。(3)20世纪以来的最近一个地震活动时期里,显示出两个活动周期。(4)在两个活动周期里,Ms≥6.5级地震具有空间上的重演。(5)一些孕震区的地震活动存在同步和滞后现象。对于长的地震活动时期有空间格局的改变,对短的活动周期有空间重演;从长期来看格局的改变是主要的,从短期来看地震的重复性是主要的;地震活动的同步和滞后现象反映了应力的传播。目前,川滇地区正处于最近一个地震活动时期的最近一个周期的前半期向后半期过渡的时期。
This paper discusses the temporal and spatial distribution of active earthquakes in Sichuan-Yunnan region. The research shows that: (1) Since the 8th century, the region has experienced two relatively complete periods of seismic activity. (2) In the two active periods, the great earthquake presented a different spatial pattern. (3) During the last seismic activity since the 20th century, two cycles of activity were shown. (4) In the two periods of activity, Ms≥6.5 earthquakes have spatial repetition. (5) The seismic activity in some seismogenic zones is synchronous and lagging. For long periods of seismic activity there is a change in the spatial pattern and space for a short period of activity recovers; changes in the pattern are dominant in the long run, and the repeatability of the earthquakes is dominant in the short term; the synchronization and lag of seismic activity Phenomenon reflects the spread of stress. At present, the Sichuan-Yunnan region is in the transitional period from the first half of the most recent period of a seismic activity to the latter half.