Precision Orbit Determination of Low-Earth Orbiters under Magnetic Storms;

Recognition of magnetic storms at the early stage with the horizontal component of geomagnetism;

Discussion on the physical mechanism of predicting big earthquakes by means of the double method of magnetic storm;

Nonlinear mechanism of four solitons on origin of magnetic storms;

2004 and that of the current of the transformer neutra1 point,the paper proved that abnormal phenomenon of bigger vibration and greater noise in transformer arose from GIC in the electric power network,which induced by magnetic storm,and pointed out magnetic storm have greater impact on chinese power grid,and magnetic storms issue have an urgent need to study.

Therefore,the study of GIC characteristics and occurrence regularity is of great significance for the analysis of the impart of magnetic storms and the warming or prediction of the magnetic storms.

Research on Dc Biased Transformers Caused by HVDC or Geomagnetic Storm;

The geomagnetic indexes to predict the time of a medium or strong earthquake are the low point movement appearing in Sichuan and nearby regions and the medium and strong geomagnetic storm with factor K≥6.

Geo-magnetically induced currents(GIC) are triggered by geomagnetic storms,the frequency of which ranges from 0.