华北大地震气压场特征分析

本文研究了发生在华北的四次强地震(即邢台、渤海、海城和唐山地震)与大气压力之间的相互关系,发现在空间和时间上,四次地震的气压变化型式几乎相似。1.震前震中地区的月平均气压距平位明显的不同于周围地区,震中十分靠近气压距平中心。2.震前逐日平均气压值呈现出一种超过10毫巴的特殊变化。上述现象表明地震孕育过程对大气可能有影响,也表明大气压力触发作用存在。作者认为这些结果可以用于短期预报。

THE CHARACTERISTIC ANALYSIS OF ATMOSPHERE PRESSURE FIELD BEFORE STRONG EARTHQUAKES IN NORTH CHINA

In this paper, the relationship between atmosphere pressure and the four strong earthquakes occurring in north China(i. e. Xingtai, Bohai, Haicheng and Tangshan)have been studied. And it is found that the pressure change patterns in space and time before four earthquakes are much the same as follows:1. The departure values of the monthly mean pressure in epicentral districts before earthquakes are evidently different from those of the surrounding ones. The epicenter is very close to the centre of pressure departure.2. The values of the daily mean pressure in epicentral districts before earthquakes show a special larger change which is usually beyond 10 mb.The above-mentioned phenomena illustrate that it is possible to have the influence of the seismic brewing process on atmosphere and the existance of trigger action.The author thinks that these consequences can be applied to the short-term prediction.