Abstract: In order to adopt the far distance between geomagnetic stations in China's mainland and in applying absolute geomagnetic measurement method to predict earthquakes, we may make a full use of the characteristics of regular isoporic distribution and expand the difference prediction method for small station distance to large station distance. This method has some prediction effects for six strong earthquakes (MS ≥ 6.0) since 1996.

Key words: Geomagnetic field, Earthquake prediction, Absolute geomagnetic measurement, Isoporic line