 Multiple dipolarization fronts observed by cluster spacecraft during a substorm were kinetic structures embedded in bursty plasma flow and moved earthward and downward. Intense electric fields and parallel and perpendicular currents were detected in these front layers, which were energy dissipation regions where electromagnetic fields transferred energy to thermal and kinetic energy of the plasma. These dissipations were dominated by electrons. Enhancements of plasma waves around the DF region were generated by alphane ion cyclotron instability and whistler waves triggered by electron temperature and esotropy and energetic electron fluxes, which could be important for understanding the evolution of DFs and electron energization during substorms. The generation mechanism of these DFs is suggested to have been transient reconnection, and they travel toward earth. This article was authored by S.Y. Huang, S.Y. Huang, M. Zhou, and others.