论文部分内容阅读
本文给出了安徽佛子岭台不同时期的平均机制解结果,并讨论了这些结果的前兆意义。同时给出了霍山地区的小震频度变化曲线,认为:霍山地区可作为华北南部地区的应力场“窗口”,佛子岭台不同时期的机制解结果同大华北地震活动发展变化较为一致,这似可作为霍山地震“窗口”效应的佐证。文中还讨论了不同地区反映应力场的变化是否与其介质条件有关;而处在同一地区的不同台站反映应力场变化的“灵敏”程度与台站所处方位有关。
This paper gives the results of the average mechanism solutions of different periods in Foziling, Anhui Province, and discusses the precursory significance of these results. At the same time, the frequency curves of small earthquakes in Huoshan area are given. The results show that the Huoshan area can be regarded as a “window” of stress field in the southern part of North China, and the results of mechanism solutions in different periods of Foziling are consistent with the development and changes of seismic activity in the Greater North China. This may serve as evidence of the “window” effect of the Huoshan earthquake. The paper also discusses whether the changes of stress field reflected in different regions are related to their media conditions. The “sensitivity” of different stations in the same area reflecting the changes of stress field is related to the location of stations.