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www.ann-geophys.net/19/621/2001/
doi:10.5194/angeo-19-621-2001
© European Geosciences Union 2001
Dense ion clouds of 0.1 − 2 keV ions inside the CPS-region observed by Astrid-2
1Swedish Institute of Space Physics, Kiruna, Sweden
2Southwest Research Institute, San Antonio, USA
Abstract. Data from the Astrid-2 satellite taken between April and July 1999 show several examples of dense ion clouds in the 0.1–2 keV energy range inside the inner mag-netosphere, both in the northern and southern hemispheres. These inner magnetospheric ion clouds are found predomi-nantly in the early morning sector, suggesting that they could have originated from substorm-related ion injections on the night side. However, their location and density show no cor-relation with Kp, and their energy-latitude dispersion is not easily reproduced by a simple particle drift model. There-fore, these ion clouds are not necessarily caused by substorm-related ion injections. Alternative explanations for the ion clouds are the direct solar wind injections and up-welling ions from the other hemisphere. These explanations do not, however, account for all of the observations.
Key words. Magnetospheric physics (energetic particles, trapped; magnetospheric configuration and dynamics; storm and substorms)
Full Article (PDF, 2018 KB)
Citation: Høymork, S. H., Yamauchi, M., Ebihara, Y., Narita, Y., Norberg, O., and Winningham, D.: Dense ion clouds of 0.1 − 2 keV ions inside the CPS-region observed by Astrid-2, Ann. Geophys., 19, 621-631, doi:10.5194/angeo-19-621-2001, 2001. Bibtex EndNote Reference Manager XML
