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.

N.A. Barkhatov at al. R(S i» ' Syxc)ж 07769 R[S mea ; ^ c ) = 0 73,5 Fig. 1. Nonnalized magnetograms for geomagnetic field horizontal components H (a) and D (b) in disturbed day on January, 7th, 2004 r ( s me *: S vkc ) ” 0 0332 R(S* * ' S vkc ) = D 1975 Fig. 2. Normalized magnetograms for geomagnetic field horizontal components H (a) and D (b) in quiet day on April, 29th, 2004 In disturbed day high correlation (correlation factor |R|>0.7) between magnetic recordings on considered observatories is marked. Development magnetospheres processes on polar and subauroral stations under the influence of the general source it allows to assume. Substorm activity on subauroral observatories of calculation Kp, i.e. to the south of usual, is marked. As a result the data used for an estimation planetary geomagnetic disturbance is deformed. It conducts to growth o f a prospective physical error of the calculated Kp index for this day. For check of this hypothesis we will in addition into consideration the magnetic data from low-latitude geomagnetic observatory Fresno (FRN, geom. latitude 43,5°), not belonging network of Kp observatories, is entered. For this data regression analysis together with the data of high-latitude observatory Yellowknife we will execute. Research has shown that substorm activity essential influence on the data o f a low-latitude observatory does not render. Low factors o f correlation between low-latitude and high-latitude magnetograms from stations of calculation Kp index it is confirmed. The analysis of materials for 2004 middle-latitude observatories Kp index and corresponding to them along a geomagnetic meridian high-latitude observatories ~30% magnetograms existence of the general magnetosphere source of disturbances (|R |>0.7) is shown. Therefore, for the purpose of an exception of superfluous influence polar electrojets at station o f calculation of Kp, subtract from magnetograms these observatories «the polar contribution» it is necessary. In the given research this term as a signal from the prospective general source generating processes in polar and subauroral zone is understood. In this connection, offered correction of Kp index o f planetary magnetic activity, clearing o f the polar contribution magnetograms from observatories of calculation Kp is reduced. The specified index dynamics of existential change magnetosphere- ionosphere current systems as a result of change o f topology of a magnetic field during the periods strong magnetospheric disturbances will allow considering. 3. Algorithm of «clearing» magnetograms from the polar contribution is working out Correction of an existing Kp index change of algorithm of its calculation is assumes. It consists in addition of some new stages. The offered algorithm sequence of following actions is contains. For everyone observatories of calculation o f Kp the high-latitude observatory corresponding to it is defined, i.e. pairs o f observatories are 14