Dependence of geosynchronous relativistic electron enhancements on geomagnetic parameters

Details Dependence of geosynchronous relativistic electron enhancements on geomagnetic parameters Dependence of geosynchronous relativistic electron enhancements on geomagnetic parameters

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1388d&link_type=abstract

Journal of Geophysical Research, Volume 108, Issue A11, pp. SMP 1-1, CiteID 1388, DOI 10.1029/2002JA009664

Physics

2

Magnetospheric Physics: Energetic Particles, Trapped, Precipitating, Magnetospheric Physics: Magnetosphere-Outer, Magnetospheric Physics: Storms And Substorms

Scientific paper

Relativistic electron fluxes observed in geosynchronous orbit by GOES-8 in 1997 to 2000 were considered as a complex function of geomagnetic indices PC, Kp, and Dst, as well as parameters of the magnetosphere size, subsolar Rs, and terminator Rf magnetopause distances. A geosynchronous relativistic electron enhancement (GREE) is determined as daily maximal electron flux exceeding the upper root mean square deviation (RMSD) threshold of about 1500 (cm2s sr)-1. Comparison analysis of the GREE dynamics and geomagnetic conditions on the rising phase of current solar cycle revealed suppression of the relativistic electron enhancements by substantially increased strong geomagnetic activity in the solar maximum. Statistical consideration of a relationship between the GREEs and the geomagnetic parameters showed that the most important parameters controlling the geosynchronous relativistic electron enhancements were 4-day averaged Kp index, PC index, and magnetopause termination distance Rf, delayed on 3 and 14 hours, respectively. Relatively high averaging time for Kp was explained by the cumulative effect of substorm energy release in a gradual mechanism accelerating the relativistic electrons in the magnetosphere. Very short time delay for PC index was interpreted as intensification of a fast acceleration mechanism producing the GREEs during severe geomagnetic storms. Substantial increase of the PC index (PC > 5) was found to be a sufficient condition for GREE occurrence. The fast response of the geosynchronous relativistic electron fluxes on the magnetosphere compression was explained by drift losses of the energetic electrons at the magnetopause, which approaches the Earth during geomagnetic storms.

Affiliated with

Also associated with

No associations

Rating

Dependence of geosynchronous relativistic electron enhancements on geomagnetic parameters 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 Dependence of geosynchronous relativistic electron enhancements on geomagnetic parameters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dependence of geosynchronous relativistic electron enhancements on geomagnetic parameters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1090959