Physics of auroral phenomena : proceedings of the 33rd Annual seminar, Apatity, 02 - 05 March, 2010 / [ed.: A.G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 206 с. : ил.

V.H. Guineva at al. The development of 4 substorms at Andenes and Longyearbyen by auroral emissions measurements has been studied. The minimum in the I6300A/I5577A ratio testifies for the most energetic electrons precipitated over the polar edge o f the auroral bulge. It is obtained, that the average ratio I6300A/I5577A is about 2 times lower at the polar edge, that inside the auroral bulge. ;■& ze.0l.200f.. SS'XM. У? 21:42:43 LVfc 2c.C1.2<A>$. Sb'J'/K 1Я !M d :4 I** ?6лЛ S&W-, W 7*. '.'I 21:21:1 I 21:00 21:10 21:20 U T , 26.01.2006 Fig. 3. A substorm at Longyerbyen on 26 January 2006. The upper panel shows the auroral bulge dynamics, expressed in the images of the 5577 A emission intensity recorded by ASI. The development of the emissions and their ratio in zenith is presented in the bottom panel. A cknow ledgem en ts. The work was supported by the Presidium of the Russian Academy of Sciences (RAS) through the basic research programme “Solar activity and physical processes in the Sun-Earth system” and by the Division of Physical Sciences of RAS through the Programme ’’Plasma processes in the solar system”. Data access has been provided under the Project “ALOMAR eARI” (RITA-CT-2003-506208), Andenes, Norway. This Project received research funding from the European Community’s 6th Framework Program. The study is part o f a joint Russian -Bulgarian project “The influence of solar activity and solar wind streams on the magnetospheric disturbances, particle precipitations and auroral emissions” of PGI RAS and STIL-BAS under the program for fundamental space research between RAS and BAS. References Burlaga, L.F., L.F. Klein, L. Sheeley, N.R. Michels, D.J. Howard, R.A. Koomen, M.J. Schwenn, and H. Rosenbauer (1982), A magnetic cloud and a coronal mass ejection. Geophys. Res. Lett., 9, 1317-1320. Despirak, I.V., A.A. Lubchich, H.K. Biemat, and A.G. Yahnin (2008), Poleward expansion of the westward electrojet depending on the solar wind and IMF parameters. Geomagnetism and Aeronomy, 48,284-292. Dmitrieva, N.P., and V.A. Sergeev (1984), The appearance of an auroral electrojet at polar cap latitudes: The characteristics of the phenomenon and the possibility of its use in predicting large-scale high-speed solar wind streams. Magnitosfernye Issledovaniia, 3, 58-66. Hviuzova, T.A., and S.V. Leontyev (1997), Characteristics of aurora spectra connected with high-speed streams from coronal holes. Geomagnetism and Aeronomy, 3 7 , 155-159. Hviuzova, T.A., and S.V. Leontiev (2001), Characteristics of aurora spectra connected with non-stationary solar wind streams. Geomagnetism and Aeronomy, 41, 337-341. Pudovkin, M.I. (1996), Solar wind. Soros Educational Journal, 12, 87-94. Sergeev, V.A., A.G. Yakhnin, and N.P. Dmitrieva (1979), Substorm in the polar cap - the effect of high-velocity streams o f the solar wind. Geomagnetism and Aeronomy, 19, 1121-1122. Sivjee, G.G., and D. Shen (1997), Auroral optical emissions during the solar magnetic cloud event of October 1995. J. Geophys. Res., 102, 7431-7437. Rees, M.H., and D. Luckey (1974), Auroral electron energy derived from ratio of spectroscopic emissions. 1 - Model computations. J. Geophys. Res., 79, 5181-5185. Wang, Y.-M., and N.R. Sheeley, Jr. (1994), Global evolution of interplanetary sector structure, coronal holes, and solar wind streams during 1976-1993: Stackplot displays based on solar magnetic observations. J. Geophys. Res., 99,6597-6612. 28