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为了进行地震预报,人们曾提出了许多地震模式,并解释了一些现象。然而有一些现象至今未能很好解释,如前兆分布一般是围绕震中呈椭园形,某一地点上的前兆异常会突然出现反向变化,以及前兆异常从外围区向震中区迁移,临震时前兆由震中区向外围迁移等。为了解释这些现象,本文主要以海城大震为例提出了一种上冲模式。
Many earthquakes have been proposed for earthquake prediction and some phenomena have been explained. However, some phenomena have not been well explained so far. For example, the distribution of precursors is generally elliptical around the epicenter. The precursory anomalies at a place suddenly appear reverse changes, and precursor anomalies migrate from the periphery to the epicenter. When the precursor from the epicenter to the periphery of the migration and so on. In order to explain these phenomena, this paper puts forward a kind of punching pattern based on the example of Haicheng earthquake.