Energetic ion anisotropies in the geomagnetic tail. I - A statistical survey. II - Magnetic field and substorm characteristics

Details Energetic ion anisotropies in the geomagnetic tail. I - A statistical survey. II - Magnetic field and substorm characteristics Energetic ion anisotropies in the geomagnetic tail. I - A statistical survey. II - Magnetic field and substorm characteristics

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98...99k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A1, p. 99-129.

Mathematics

Probability

9

Energetic Particles, Geomagnetic Tail, Geomagnetism, Ion Distribution, Magnetic Storms, Statistical Analysis, Anisotropy, Ion Temperature, Magnetic Field Reconnection, Magnetohydrodynamic Waves, Probability Theory

Scientific paper

A comprehensive data set from the ISEE 2 spacecraft is used here to perform a statistical study of events in the earth's central magnetotail that are characterized by high anisotropies of energetic ions. In about 75 percent of the cases the anisotropy vector deviates no more than 45 deg from the tidal axis. High-anisotropy samples within 45 deg of the tidal axis are dominated by the earthward fraction. High ion anisotropies are observed continuously for longer than 1 min only in a few cases. The probability of observing high ion anisotropies is significantly enhanced beyond about 16 R(E) downtail distance within a few earth radii of the neutral sheet and on the duskside of the magnetotail. The analysis is extended with respect to the local magnetic field and to the relationship between energetic ion anisotropies and substorm phases. It is found that the events can be well organized in terms of substorm expansion phase and substorm recovery. These relations and the magnetic field characteristics during the events support the notion that the near-earth source of tailward streaming ions is identical with a substorm neutral line.

Affiliated with

Also associated with

No associations

Rating

Energetic ion anisotropies in the geomagnetic tail. I - A statistical survey. II - Magnetic field and substorm characteristics 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 Energetic ion anisotropies in the geomagnetic tail. I - A statistical survey. II - Magnetic field and substorm characteristics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energetic ion anisotropies in the geomagnetic tail. I - A statistical survey. II - Magnetic field and substorm characteristics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1262135