中文摘要：

用东方西方，地磁气的骚乱领域从车站观察了在中间纬度，我们在 2000 年 4 月 6 日 superstorm 期间在夜面上调查排列地的水流的特征。结果显示在磁性的暴风雨的主要阶段期间北半球的夜面上有东方骚乱，当星际间的磁场(IMF ) 被继续时向南方。在 postmidnight 的积极骚乱在 premidnight 比那大。这建议向上排列地的水流在夜面上发展，当 IMF 被指导时向南方。向上排列地的水流的山峰位于 postmidnight，并且它将在 substorm 扩大是更明显的。我们得到结论当前的部分戒指和 region-2 排列地的当前的移动到黄昏部门。向上的 region-2 水流在 substorm 发作被减少，并且在它以后加强了。我们也在高纬度在夜面和黎明的电喷射气流上调查在向上排列地的水流之间的关系。它显示出在 region-2 电流之间的好通讯并且向西在 postmidnight 的电喷射气流。我们假定他们两个都与传送对流电场被联系。

英文摘要：

Using the east-west geomagnetic disturbance fields observed from stations at mid-latitudes, we investigate the characteristics of field-aligned currents on the nightside during the April 6, 2000 superstorm. The results indicate that there is an eastward disturbance on the nightside of Northern Hemisphere during the main phase of magnetic storm, while the interplanetary magnetic field （IMF） is continued southward. The positive disturbances in the postmidnight are larger than that in the premidnight. This suggests that upward field-aligned currents develop on the nightside, when the IMF is directed southward. The peak of upward field- aligned currents is located in postmidnight, and it will be more obvious at substorm expansion. We get the conclusion that both partial ring current and region-2 field-aligned current shift to dusk sector. The upward region-2 current is decreased at substorm onset, and intensified after it. We also investigate the relationship between the upward field-aligned currents on the nightside and the auroral electrojets at high latitudes. It shows a good correspondence between region-2 current and the westward electrojet in the postmidnight. We suppose that they are both associated with the convection electric field.