Physics
Scientific paper
Jan 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000angeo..18...42a&link_type=abstract
Annales Geophysicae, vol. 18, Issue 1, pp.42-46
Physics
7
Scientific paper
We present for the first time a statistical study of geq50 keV ion events of a magnetospheric origin upstream from Earth's bow shock. The statistical analysis of the 50-220 keV ion events observed by the IMP-8 spacecraft shows: (1) a dawn-dusk asymmetry in ion distributions, with most events and lower intensities upstream from the quasi-parallel pre-dawn side (4 LT-6 LT) of the bow shock, (2) highest ion fluxes upstream from the nose/dusk side of the bow shock under an almost radial interplanetary magnetic field (IMF) configuration, and (3) a positive correlation of the ion intensities with the solar wind speed and the index of geomagnetic index Kp, with an average solar wind speed as high as 620 km s-1 and values of the index Kp > 2. The statistical results are consistent with (1) preferential leakage of sim50 keV magnetospheric ions from the dusk magnetopause, (2) nearly scatter free motion of sim50 keV ions within the magnetosheath, and (3) final escape of magnetospheric ions from the quasi-parallel dawn side of the bow shock. An additional statistical analysis of higher energy (290-500 keV) upstream ion events also shows a dawn-dusk asymmetry in the occurrence frequency of these events, with the occurrence frequency ranging between sim16%-sim34% in the upstream region.
Anagnostopoulos G. C.
Argyropoulos G.
Kaliabetsos G.
No associations
LandOfFree
Spatial distribution of upstream magnetospheric geq50 keV ions 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 Spatial distribution of upstream magnetospheric geq50 keV ions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spatial distribution of upstream magnetospheric geq50 keV ions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1253088