The effect of interplanetary parameters as observed in geomagnetic storms in dependence on geomagnetic latitude

Summary The purpose of this study was to determine to what extent the effect of interplanetary parameters is reflected in the separate storms in dependence on geomagnetic latitude. The results were obtained by studying 5 storms of February 1967 and 1968 recorded at 6 observatories between latitude 5.7° and 53.5° with small differences in local time. These results concern the dynamic pressure of the solar wind and the function of the interplanetary electric field, which approximates the plasma injection into the ring current. This is also associated with the decay time of the storm ring. In most cases the dependence of the effect of the investigated parameters on latitude was proved and expressed in terms of quantitative relations with a reasonable degree of correlation. The derived constants were used in a model of time variations of the storm-time geomagnetic field. The storm-time variations, constructed using this model, mostly agree, as regards their main features, with the real variations, whereas differences can be observed in details, namely of a local nature.

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mam maua maum, a nm uu nam naam u nu amuu auumu maum um. mam mm 5 , aumua a 1967. u 1968. m amuu um ¶rt;uana 5, 7°–53,5° nu auuu m u. mam aam ¶rt;uau ¶rt;au ma u uu nam mu n, m annuum uu na m. mu a u ana¶rt;a m ma. um a auum ma u¶rt; naam m um n¶rt;m¶rt;ua u a aa um nu ¶rt;mam mnu uu. nm u una ¶rt;u uuaum n u. ¶rt; auauu u am ¶rt;mumu, u ¶rt;ma mam m mu num a aama.