Fig. 14.
From: ULF waves in the outer magnetosphere: Geotail observation 1 transverse waves
(a) Geomagnetic variations at TRO, IQA and HUA, solar wind and IMF variations observed by the ACE spacecraft (time shifted by 53.5 min) on December 13, 1999. The arrows indicate magnetic local noon at IQA and HUA. (b) Comparison of ground and GTL PSDs in the interval from 17:25. The top panel shows ground PSDs at high latitudes in the forenoon region. PSDs at three low latitude stations, MBO, BNG and MMB are shown in the left bottom part. The second panel shows PSDs at high latitude stations and HUA in the dip equator in the afternoon sector.