Position of the Energetic Electron Trapping Boundary Relative to Auroral Oval Boundaries during the Magnetic Storm on December 19–22, 2015, Based on Data from the Meteor-M2 Satellite
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This paper studies the position of the trapping boundary of electrons with energies of >100 keV relative to the equatorial boundary of the auroral oval during a large magnetic storm on December 19–22, 2015, with a minimum Dst of –170 nT as measured by the Meteor-M2–1 satellite. Energetic electrons with energies from 0.1 to 13 MeV and fluxes of low-energy electrons with energies from 0.13 to 16.64 keV have been measured. It is taken into account that the pitch-angle distribution of energetic electrons near the trapping boundary is almost isotropic. It is shown that the energetic electron trapping boundary during the considered storm is detected inside the auroral oval or near its polar boundary. The distance along the geomagnetic latitude between the energetic electron trapping boundary and the equatorial boundary of the auroral oval is determined. The dependence of this distance on time for crossings of the oval before and after midnight is analyzed. It is shown that the distance between the trapping boundary and the equatorial boundary of the oval during the storm decreases after midnight and increases before midnight. These values are almost equal near minimum Dst. The significance of the results obtained for a description of changes in the magnetospheric topology during magnetic storms is discussed.
We thank the team of developers of the equipment for METEOR satellites and the creators of the OMNI database.
This work was supported by the Russian Foundation for Basic Research, project no. 18-05-00362.
- 2.Akasofu, S.I., Polar and Magnetospheric Substorms, Dordrecht: D. Reidel, 1968; Moscow: Mir, 1971.Google Scholar
- 3.Antonova, E.E. and Stepanova, M.V., The problem of the acceleration of electrons of the outer radiation belt and magnetospheric substorms, Earth Planets Space, 2015, vol. 67. https://doi.org/10.1186/s40623-015-0319-7
- 4.Antonova, E.E., Kirpichev, I.P., Vovchenko, V.V., Stepanova, M.V., Riazantseva, M.O., Pulinets, M.S., Ovchinnikov, I.L., and Znatkova, S.S., Characteristics of plasma ring, surrounding the earth at geocentric distances ~7–10R E, and magnetospheric current systems, J. Atmos. Sol.-Terr. Phys., 2013, vol. 99, no. 7, pp. 85–91. https://doi.org/10.1016/j.jastp.2012.08.013 CrossRefGoogle Scholar
- 5.Antonova, E.E., Vorobjev, V.G., Kirpichev, I.P., and Yagodkina, O.I., Comparison of the plasma pressure distributions over the equatorial plane and at low altitudes under magnetically quiet conditions, Geomagn. Aeron. (Engl. Transl.), 2014, vol. 54, no. 3, pp. 278–281. https://doi.org/10.7868/S001679401403002X
- 6.Antonova, E.E., Vorobjev, V.G., Kirpichev, I.P., Yagodkina, O.I., and Stepanova, M.V., Problems with mapping the auroral oval and magnetospheric substorms, Earth Planets Space, 2015, vol. 67. https://doi.org/10.1186/s40623-015-0336-6
- 8.Baker, D.N., Elkington, S.R., Li, X., and Wiltberger, M.J., Particle acceleration in the inner magnetosphere, in The Inner Magnetosphere: Physics and Modeling, Pulkinen, T.I., Tsyganenko, N.A., and Friedel, R.H.W.V., Eds., Washington D.C., Am. Geophys. Union, 2005, pp. 73–85.Google Scholar
- 9.Feldstein, Ya.I., Some problems in the morphology of polar auroras and magnetic disturbances at high latitudes, Geomagn. Aeron., 1963, vol. 3, no. 2, pp. 227–239.Google Scholar
- 11.Feldstein, Y.I., Vorobjev, V.G., Zverev, V.L., and Förster, M., Investigations of the auroral luminosity distribution and the dynamics of discrete auroral forms in a historical retrospective, Hist. Geo- Space Sci., 2014, vol. 5, no. 1, pp. 81–134. https://doi.org/10.5194/hgss-5-81-2014 CrossRefGoogle Scholar
- 21.Kalegaev, V.V., Barinova, V.O., Myagkova, I.N., Eremeev, V.E., Parunakyan, D.A., Nguyen, M.D., and Barinov, O.G., Empirical model of the high-latitude boundary of the Earth’s outer radiation belt at altitudes of up to 1000 km, Cosmic Res., 2018, vol. 56, no. 1, pp. 32–37. https://doi.org/10.7868/S0023420618010053 CrossRefGoogle Scholar
- 22.Kanekal, S.G., Baker, D.N., Blake, J.B., Klecker, B., Cummin, J.R., Mewaldt, R.A., Mason, G.M., and Mazur, J.E., High-latitude energetic particle boundaries and the polar cap: A statistical study, J. Geophys. Res., 1998, vol. 103, pp. 9367–9372. https://doi.org/10.1029/97JA03669 CrossRefGoogle Scholar
- 23.Kirpichev, I.P., Yagodkina, O.I., Vorobjev, V.G., and Antonova, E.E., Position of projections of the nightside auroral oval equatorward and poleward edges in the magnetosphere equatorial plane, Geomagn. Aeron. (Engl. Transl.), 2016, vol. 56, no. 4, pp. 407–414. https://doi.org/10.7868/S0016794016040064
- 24.Kuznetsov, S.N. and Tverskaya, L.V., Radiation belts, in Modeli Kosmosa, (Models of the Cosmos), Panasyuk, M.I., Ed., Moscow: Universitet, 2007, vol. 1, ch. 3.4, pp. 518–546.Google Scholar
- 27.Reeves, G.D., McAdams, K.L., Friedel, R.H.W., and O’Brien, T.P., Acceleration and loss of relativistic electrons during geomagnetic storms, Geophys. Res. Lett., vol. 30, no. 10. https://doi.org/10.1029/2002GL016513
- 28.Rezhenov, B.V., Vorob’ev, V.G., Tsirs, V.E., Lyatskii, V.B., Pervaya, T.I., and Savin, B.I., Distribution of intruding low-energy electrons in the evening–premidnight sector according to Kosmos-426 data, Geomagn. Aeron., 1975, vol. 13, no. 4, pp. 521–527.Google Scholar
- 29.Riazantseva, M.O., Myagkova, I.N., Karavaev, M.V., Antonova, E.E., Ovchinnikov, I.L., Marjin, B.V., Saveliev, M.A., Feigin, V.M., and Stepanova, M.V., Enhanced energetic electron fluxes at the region of the auroral oval during quiet geomagnetic conditions November 2009, Adv. Space Res., 2012, vol. 50, pp. 623–631. https://doi.org/10.1016/j.asr.2012.05.015 CrossRefGoogle Scholar
- 30.Riazanteseva, M.O., Antonova, E.E., Stepanova, M.V., Marjin, B.V., Rubinshtein, I.A., Barinova, V.O., and Sotnikov, N.V., A relation between the locations of the polar boundary of outer electron radiation belt and the equatorial boundary of the auroral oval, Ann. Geophys., 2018, vol. 36, pp. 1131–1140. https://doi.org/10.5194/angeo-36-1131-2018 CrossRefGoogle Scholar
- 31.Turner, D.L., Angelopoulos, V., Li, W., Hartinger, M.D., Usanova, M., Mann, I.R., Bortnik, J., and Shprits, Y., On the storm-time evolution of relativistic electron phase space density in Earth’s outer radiation belt, J. Geophys. Res.: Space Phys., 2013, vol. 118, pp. 2196–2212. https://doi.org/10.1002/jgra.50151 CrossRefGoogle Scholar
- 33.Yahnin, A.G., Sergeev, V.A., Gvozdevsky, B.B., and Vennerstrum, S., Magnetospheric source region of discrete auroras inferred from their relationship with isotropy boundaries of energetic particles, Ann. Geophys., 1997, vol. 15, pp. 943–958. https://doi.org/10.1007/s00585-997-0943-z CrossRefGoogle Scholar
- 34.Yermolaev, Y.I. and Nikolaeva, N.S., Catalog of large-scale solar wind phenomena during 1976–2016, VarSITI Newsletter, 2017, vol. 14, pp. 6–7. https://www.researchgate.net/ publication/318239148.Google Scholar