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dc.contributor.authorAnagnostopoulos, Georgios C.
dc.contributor.authorKaranikola, I.
dc.contributor.authorRigas, A.
dc.date.accessioned2015-04-10T15:25:34Z
dc.date.available2015-04-10T15:25:34Z
dc.date.issued1999
dc.identifier.citationAnagnostopoulos, G., Karanikola, I., & Rigas, A. (1999) Characteristics of >= 290 keV magnetosheath ions. Annales Geophysicae, 17(5), 650.en_US
dc.identifier.urihttp://hdl.handle.net/11141/548
dc.description.abstractWe performed a statistical analysis of 290-500 keV ion data obtained by IMP-8 during the years 1982-1988 within the earth's magnetosheath and analysed in detail some time periods withdistinct ion bursts. These studies reveal the following characteristics for magnetosheath 290-500 keV energetic ions: (a) the occurrence frequency and the flux of ions increase with increasing geomagnetic activity as indicated by the Kp index; the occurrence frequency was found to be as high as P > 42% for Kp > 2, (b) the occurrence frequency in the dusk magnetosheath was found to be slightly dependent on the local time and ranged between ~30% and ~46% for all Kp values; the highest occurrence frequency was detected near the dusk magnetopause (21 LT), (c) the high energy ion bursts display a dawn-dusk asymmetry in their maximum fluxes, with higher fluxes appearing in the dusk magnetosheath, and (d) the observations in the dusk magnetosheath suggest that there exist intensity gradients of energetic ions from the bow shock toward the magnetopause. The statistical results are consistent with the concept that leakage of magnetospheric ions from the dusk magnetopause is a semi-permanent physical process often providing the magnetosheath with high energy (290-500 keV) ions.en_US
dc.language.isoen_USen_US
dc.rightsThis is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.titleCharacteristics of >= 290 keV magnetosheath ionsen_US
dc.typeArticleen_US
dc.identifier.doi10.1007/s00585-999-0650-z


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This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.