To directly driven and loading-unloading processes during substorm
1996 (English)In: European Space Agency, (Special Publication) ESA SP, ISSN 03796566 (ISSN), no 389, 69-74 p.Article in journal (Refereed) Published
Model calculations of the electric fields in the high-latitude ionosphere are compared to measurements made by the Viking satellite during August 3, 1986 pass. The model calculations are based on the IZMEM procedure, where the electric field and currents in the ionosphere are given as functions of the interplanetary magnetic field (IMF). The event chosen correspond to the growth phase of substorm. The correlation between the model results and the satellite data is high, which assumes directly driven of the magnetosphere by the solar wind. Similar high correlation exists between the electric field in the solar wind (V*Bs) and AL magnetic activity indices, if time delays between the V*Bs observations in space and magnetic activity above the Earth's ground are taken into account. It is concluded, that the directly driven response of the magnetosphere to highly variable solar wind electric field is the main feature of geomagnetic activity at high latitudes.
Place, publisher, year, edition, pages
1996. no 389, 69-74 p.
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:kth:diva-91721OAI: oai:DiVA.org:kth-91721DiVA: diva2:511113
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