大同地震与华北北部地壳异态垂直运动

The Datong Earthquake and the Abnormal Vertical Crustal Movement in North China

本文根据笔者提取异态信息的新数据处理方法，分析了华北北部地区近十年来地壳异态垂直运动。结果显示出以大同地震为界（１９８９），震前的整个华北北部地区均处于应变的积累阶段，而且震源区具有非常清晰的四象限分布图像，呈一种典型的水平应力作用下的点源理论垂直形变场图象，震后整个华北北部地区则出现了截然相反的异态垂直运动，这又清楚地表明了具有弹性回跳的理论特征。迄今为止，这是我们唯一获得中强地震前后地壳异态垂直运动在空间上具有如此大范围的一致性，在时间上（地震前后）具有互反性及“场”、“源”图象分布有序性的结果。

In this paper, the abnormal vertical crustal movement in North China are studied in the recent decade by authors' new method for the abnormal deformation information and the results show that North China had been in strain accumulation before the Datong earthquake(1989) and there had been a very obvious quadrantal distribution image in Datong area of North China and that there has been in strain recovery of movement or elastic rebound after the event. UP to now, this is that we have obtained a unique result which has the same movement property in such a large area from the space field, an opposite movement from the time field and the order structure of the image distrbution of the 'field' and the 'resource'before and after the event of more than Ms=6.0.