Physics
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...10023695r&link_type=abstract
Journal of Geophysical Research, Volume 100, Issue A12, p. 23695-23702
Physics
35
Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Interplanetary Physics: Interplanetary Shocks, Ionosphere: Electric Fields, Magnetospheric Physics: Current Systems
Scientific paper
The response of subauroral H component magnetograms at the time of passage of interplanetary shocks under northward interplanetary magnetic field (IMF) conditions is used to examine the behavior of the magnetosphere when it is suddenly compressed. At subauroral latitudes, near 55° or L=3, the response has some similarities and some important differences from the low-latitude response. The first effect is a preliminary impulse which appears to be due to the Hall current driven in the ionosphere by the arrival of the first Alfven waves along the magnetic field lines from the distant equatorial magnetosphere that has been set in motion by the penetration of the shock wave into the magnetosphere. Next there is a general increase of the magnetic field everywhere as the magnetosphere is compressed to its new size and the information of this compression propagates to the ground. This increase takes about 5 min followed by a 10-min relaxation to the final asymptotic value. This general increase is accompanied by two more localized current systems: one transient and one steady. The transient current appears to be a dual-vortex current system launched from noon toward the nightside. The other steady system is a fixed double-cell convection system. We identify the former with the propagation of the magnetopause indentation associated with the enhanced pressure in the solar wind. We attribute the latter, steady system to high-latitude reconnection with northward IMF.
Ginskey M.
Russell Christopher T.
No associations
LandOfFree
Sudden impulses at subauroral latitudes: Response for northward interplanetary magnetic field 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 Sudden impulses at subauroral latitudes: Response for northward interplanetary magnetic field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sudden impulses at subauroral latitudes: Response for northward interplanetary magnetic field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1561296