Abstract:

Based on the simultaneous FGM observations of 4 Cluster satellites,this paper calculated and analyzed the current density of FTEs occurred between 12:24 and 12:54UT on April 1,2004 by using the Curlometer analyzer.It showed that intense current flows inside the flux tubes with the current density reaching as high as about 10-7A/m2.By Minimum Directional Derivative(or Difference)(MDD) analyzing,it was also found that the FTEs were of the quasi-2D structure,the direction of the current was almost parallel to the plasma flows and the axis of the flux tubes.