Исследование стационарной магнитосферной конвекции / В. А. Сергеев [и др.] ; Акад. наук СССР, Кол. фил. им. С. М. Кирова, Поляр. геофиз. ин-т. – Препр. ПГИ 86-05-47. - Апатиты : Кольский филиал АН СССР, 1986.

fluctuations was found during other SHC episodes. There is a good possibility for monitoring magnetospheric convection for these cases, based on the IMS magnetometer data from the southern (sunlit) polar cap. Fig.9 shows, as an example, the equivalent current pattern obtained by the Antarctic chain of magnetometer (6 ones between -77°A and South invariant magnetic pole - all at 110°E CGLong) during the whole day on Nov.24, 1981. This figure shows the intense transpolar part of twin-vor- tice convection cell continuing throughout all that day. The zonal component of the equivalent currents during 07-18 MLT is due to the positive By existed during the first half of the day on Nov.24, 1981. Quite an interesting feature was found in the analysis of the riometer absorption data available from the worldwide network of stations. It showed almost no absorption (no intense precipita tion of the energetic electrons) within the auroral zone during SMC periods, that contrasts sharply with the absorption bays fol lowed after the substorms. Finishing this section we must mention that many interesting observations and few puzzling features stayed outside of this brief presentation. In summary, during SMC episodes we found few repetitious patterns. The gross equivalent current system consists of the DP-2 like (plus B^. induced) currents in the polar cap and two intense (westward and eastward) electrojets. The auroral pre cipitation pattern consists of intense diffuse-like precipitation and a steady (in the large-scale sense) auroral bulge at the night- side of the auroral zone, which contacts bright and regular even ing-side auroral arcs. No significant energetic electron precipi tation is found within the auroral electron precipitation region. Though this large-scale pattern is reproduced steadily, many transi ent (probably, local) features are found, especially within the westward A£J and Earang discontinuity regions. 5. Data availability and future aspects of SMC campaign Here we shall discuss two described intervale from the view point of the data available (or expected to be available). These intervals, Feb.19-20, 1978 (A) and Nov.24, 1981 (3), are similar in their seasons, AEJ intensities and solar wind conditions (with their main difference being in the sign of IMF By component). 19