Global evolution and propagation of electric fields during sudden commencements based on multi-­point observations

Naoko Takahashi1, Yasumasa Kasaba2, Yukitoshi Nishimura3, Dr. Atsuki Shinbori4, Takashi Kikuchi5, Tomoaki Hori6 and Nozomu Nishitani4, (1)Tohoku University, Sendai, Japan, (2)Tohoku University, Department of Geophysics, Graduate School of Science, Sendai, Japan, (3)University of California Los Angeles, Department of Atmospheric and Oceanic Sciences, Los Angeles, United States, (4)Nagoya University, Institute for Space-Earth Environmental Research, Nagoya, Japan, (5)Nagoya University, Solar-Terrestrial Environment Laboratory, Nagoya, Japan, (6)Nagoya University, Institute for Space-Earth Environment Research, Nagoya, Japan