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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 33, issue 8
Ann. Geophys., 33, 1059–1070, 2015
https://doi.org/10.5194/angeo-33-1059-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Dynamic processes in geospace

Ann. Geophys., 33, 1059–1070, 2015
https://doi.org/10.5194/angeo-33-1059-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Regular paper 31 Aug 2015

Regular paper | 31 Aug 2015

Energy–latitude dispersion patterns near the isotropy boundaries of energetic protons

V. A. Sergeev et al.

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Short summary
We investigate the precipitated-to-trapped flux ratio patterns near the proton isotropy boundary (IB) using NOAA-POES observations. For 30 and 80keV proton energies, we found only 31% of events showing the dispersion pattern predicted by the non-adiabatic scattering in the tail current sheet. Most frequent pattern had no measureable IB energy dispersion (63%); structured IBs with a few Jprec/Jtrap dropouts were also usual (60%). Roles of current sheet and wave-induced scattering are discussed.
We investigate the precipitated-to-trapped flux ratio patterns near the proton isotropy boundary...
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