The coupling of Dst variations to the interplanetary magnetic field

Details The coupling of Dst variations to the interplanetary magnetic field The coupling of Dst variations to the interplanetary magnetic field

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ge%26ae..19..703s&link_type=abstract

Geomagnetizm i Aeronomiia, vol. 19, July-Aug. 1979, p. 703-707. In Russian.

Computer Science

1

Geomagnetism, Interplanetary Magnetic Fields, Magnetic Storms, Ring Currents, Magnetic Signatures, Magnetic Variations, Magnetospheric Instability, Solar Wind, Time Response

Scientific paper

The coupling of the southern z-component of the interplanetary magnetic field to the magnitude of the index of Dst variations is examined on the basis of energetic relationships and experimental data for the moment of maximal field depression during the principle phase of a magnetic storm. A linear relationship between the southern z-component of the interplanetary field and a reduced Dst index is derived for the moment of maximal ring-current depression, and proportionality factors are determined from experimental data. The use of values of the southern z-component of the interplanetary magnetic field to predict extremum values of the Dst index is evaluated and simultaneous changes of the z-component of the interplanetary magnetic field and the Dst index are illustrated by cases of the single-stage and double-stage injection of particles into the ring current. The two distinct types of interplanetary magnetic field and associated Dst variations, corresponding to isolated streams of interplanetary plasma and two streams of solar plasma, are also discussed.

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