Based on ground-based GPS TEC and occultation electron density of ionosphere,it is possible to detect and identify disturbance stimulated by earthquake wave.In this paper,the ionospheric effect was obtained through ground-based GPS TEC and occultation electron density of ionosphere before several earthquakes occurred in Fujian province in recent years,which provides predictive hints for earthquake prediction of our province in future.
Using the method of geomagnetic annual difference,the anomalies in data of mobile geomagnetic survey in April,2006,in west area of Fujian province are ideatified.It is considered that the anomalies are relate to the increasing of the regional stress field before M4.9 and M4.7 earthquakes in Shunchang county,Fujian province.It is also found that the anomalies synchronistically occurred in the stations which distribute along a fault before the earthquakes.It is possible that the phenomena is relate to the stress centralizing in some structure parts.
