Physics
Scientific paper
Mar 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.4115o&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A3, p. 4115-4129
Physics
28
Auroras, Geomagnetic Pulsations, Morning, Particle Precipitation, Polar Substorms, Self Organizing Systems, Earth Magnetosphere, Vortex Streets
Scientific paper
In contrast to the extensively studied growth and expansion phases of magnetospheric substorms, the substorm recovery phase has not received much attention in the published literature. It has generally been considered as a period in which all disturbances caused by the previous two phases decay, the magnetosphere 'recovers' to reach a quiet state again. Using mainly ground-based data, we show that the 'recovery phase' contains a number of features which are qualitatively different from the expansion phase, that is, not just a decay of previously excited forms of energy release. Typical recovery phase phenomena include intense electrojet activity in the morning sector, high-energy particle precipitation, the development of large-scale auroral vortex streets (so-called Omega bands and associated magnetic Ps 6 pulsations), and very often new eastward expanding active auroral phenomena, not unlike evening-sector expansion phase features but concentrated to the morning sector of the auroral oval. Such features must be associated with the substorm mechanism itself. We suggest that our observations during the substorm recovery phase are explained by the magnetospheric reorganization after the ejection of a plasmoid. We show that a more detailed investigation of the late substorm features can increase our understanding of the physical processes leading to the complete cycle of magnetospheric energy release.
Opgenoorth Hermann J.
Pellinen Risto J.
Persson A. L. M.
Pulkkinen Tuija I.
No associations
LandOfFree
Recovery phase of magnetospheric substorms and its association with morning-sector aurora does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Recovery phase of magnetospheric substorms and its association with morning-sector aurora, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery phase of magnetospheric substorms and its association with morning-sector aurora will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1872032