Physics
Scientific paper
Feb 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ssrv...18..413k&link_type=abstract
Space Science Reviews, vol. 18, Feb. 1976, p. 413-540. Research supported by the Department of Space of India.
Physics
14
Geomagnetism, Magnetic Variations, Periodic Variations, Auroral Electrojets, Diurnal Variations, Energy Transfer, Equatorial Electrojet, Geomagnetic Micropulsations, Kp Index, Magnetic Storms, Magnetospheric Instability, Secular Variations, Solar Cycles, Solar Wind
Scientific paper
Different types of quiet-day variations are described and present ideas regarding their possible mechanisms are discussed. In general, periodicities exceeding several tens of years can be attributed to changes in the interior of the earth while periodicities of 22 years or less seem to be related to the interaction of solar wind with the earth's magnetosphere. The morphology of irregular storm-time variations and its relationship with interplanetary plasma parameters is discussed with particular reference to the orientations of interplanetary magnetic field. Various storm-time phenomena occurring in the polar, auroral, mid-latitude and equatorial regions and their interconnections are described. Theoretical models offering explanations of many of these phenomena are discussed, the unsolved problems are outlined, and the direction of the present effort in solving these is indicated.
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