Thayer School of Engineering
We study compressional pulsations in Pc5 frequency range observed in the dawn-side at distances of about 10 RE, close to the magnetic equator. We use data obtained during two events of conjunctions between Equator-S and Geotail: 1000-1700 UT on 9 March 1998, and 0200-0600 UT on 25 April 1998. In both events, pulsations are observed after substorm activity. The pulsations are antisymmetric with respect to the equatorial plane (even mode), and move eastward with phase velocity close to plasma velocity. The pulsations tend to be pressure balanced. We also discuss possible generation mechanisms of the pulsations.
Vaivads, A.; Baumjohann, W.; Haerendel, G.; Nakamura, R.; Kucharek, H.; Klecker, B.; Lessard, M. R.; Kistler, L. M.; Mukai, T.; Nishida, A. Compressional Pc5 Type Pulsations in the Morningside Plasma Sheet. Annales Geophysicae 2001, 19 (3), 311–320. https://doi.org/10.5194/angeo-19-311-2001.
Dartmouth Digital Commons Citation
Vaivads, A.; Baumjohann, W.; Haerendel, G.; Nakamura, R.; Kucharek, H.; Klecker, B.; Lessard, M. R.; Kistler, L. M.; Mukai, T.; and Nishida, A., "Compressional Pc5 type pulsations in the morningside plasma sheet" (2001). Dartmouth Scholarship. 4255.