地震活动周期的谱分析

SPECTRAL ANALYSIS OF THE PERIODS IN THE SEISMIC ACTIVITY

本文通过谱分析方法,探讨了台湾东带、台湾西带和泉州—汕头地震带地震活动的周期性。结果表明,这三条地震带均隐含了2—3种周种;三条地震带的卓越周期分别为17、30和335年。即由板块冲撞部位向大陆内部,地震活动周期由十几年增加到几百年。这一现象可能反映了板块活动及其对大陆内部作用的某种规律。深入研究这三条地震带的地震活动规律,有可能揭示板缘与板内地震之间的内在关系。

In this paper, the periods of the seismic activity in the east and west of Taiwan and Quanzhou-Shantou belts are studied. The result shows that all of the three belts contain two or three types of periods. The predominateperiod of the three belts is 17, 30 and 335 years respectively, the period increases from 17 to 335 years with the site of the plate in collision toward the inside of continent. This may suggest some regularity about the activity of plates and their actions on the inside of the continent. Going further into the question of the regularity about seismicity in the three belts, we may reveal the correlation of seismicity in the edge and the inside of th e plate.