 Multiple dipolarization fronts, DFs, were observed by cluster spacecraft in the magnetotail during a substorm. These DFs were kinetic structures embedded in the bursty plasma flow, and moved earthward, mainly, and toward Dawnward. Intense electric field, parallel and perpendicular currents were also detected in the DF layer. This article was authored by S.Y. Huang, S.Y. Huang, M. Zhou, and others.