Evolution of the near-Earth magnetotail associated with substorm expansion onsets

# Yukinaga Miyashita[1]; Shinobu Machida[2]; Yohsuke Kamide[3]; Kan Liou[4]; Masaki Fujimoto[5]; Akimasa Ieda[6]; Daisuke Nagata[7]; Miho Saito[8]; Toshifumi Mukai[9]; Yoshifumi Saito[10]; Masahito Nose[11]; Stephen P. Christon[12]; H.U. Frey[13]; Christopher T. Russell[14]; H. J. Singer[15] [1] ISAS/JAXA; [2] Dept. of Geophys., Kyoto Univ.; [3] RISH, Kyoto Univ; [4] JHU/APL; [5] ISAS, JAXA; [6] STEL, Nagoya Univ.; [7] Dept. of Geophysics, Kyoto Univ.; [8] Earth and Planetary Sci,Tokyo Univ; [9] JAXA; [10] ISAS; [11] DACGSM, Kyoto Univ.; [12] Focused Analysis and Research; [13] U.C.Berkeley; [14] IGPP,UCLA; [15] National Oceanic & Atmospheric Admin.