A comparison of the observed mid-latitude magnetic disturbance fields with those reproduced from the high-latitude modeling current system

Details A comparison of the observed mid-latitude magnetic disturbance fields with those reproduced from the high-latitude modeling current system A comparison of the observed mid-latitude magnetic disturbance fields with those reproduced from the high-latitude modeling current system

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....8910881s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Dec. 1, 1984, p. 10881-10889.

Physics

20

Geomagnetism, Ionospheric Currents, Magnetic Disturbances, Magnetospheric Instability, Midlatitude Atmosphere, Current Distribution, Diurnal Variations, Field Aligned Currents, Magnetic Storms, Ring Currents

Scientific paper

Magnetic disturbance fields at six mid-latitude stations are computed at 5-min intervals for March 17, 18, and 19, 1978 using a numerical modeling method developed by Kamide et al. (1981). Then each ionospheric high-latitude current segment is assumed to be connected to two (upward and downward) field-aligned currents along the dipole field lines and a closure current in the equatorial plane of the magnetosphere. None of the magnetic records from the six mid-latitude stations were used in determining the high-latitude modeling current system. It is shown that the middle-latitude magnetic disturbance fields thus constructed can reproduce fairly well the observed fields (both the H and D components), indicating that the method used is fairly reliable. Further, in agreement with earlier studies, the field-aligned current segments have, in general, the largest contribution to both the H and D components in the middle latitude. The differences between the observed and computed magnetic fields are discussed in detail.

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