Fig. 11.
From: ULF waves in the outer magnetosphere: Geotail observation 1 transverse waves
Comparison of PSDs among the three intervals from 6:00, 6:50 and 7:35. The first interval corresponds to the growth phase. The second and third intervals correspond to the expansion phase and recovery phase of substorm, respectively. PSDs of magnetic variations at three stations, HRN, MAW and BJN, are shown in top panels of (a) and (b). PSDs at three stations LRV, GDH and NAQ, are added to the top panel of (c).