Computer simulation of inner magnetospheric dynamics for the magnetic storm of July 29, 1977

Details Computer simulation of inner magnetospheric dynamics for the magnetic storm of July 29, 1977 Computer simulation of inner magnetospheric dynamics for the magnetic storm of July 29, 1977

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.5949w&link_type=abstract

Journal of Geophysical Research, vol. 87, Aug. 1, 1982, p. 5949-5962.

Physics

85

Earth Magnetosphere, Magnetic Storms, Atmospheric Heating, Atmospheric Models, Birkeland Currents, Computerized Simulation, Electric Fields, Ionospheric Currents, Ring Currents, Sudden Storm Commencements

Scientific paper

The Rice University convection model is applied to the early main phase of the July 29, 1977 magnetic storm through a computer implementation that self-consistently calculates electric fields, currents, and plasma distributions and velocities in the inner magnetosphere/ionosphere system. On the basis of solar wind parameters and AL index as inputs, the model predicts the injection of plasma sheet plasma to form a substantial storm time ring current whose total predicted strength agrees with the observed Dst index. The possibility that the magnetic field may be sufficiently inflated to make 60 deg field lines extend to the outer magnetosphere is examined. In the model, distortion of the plasma sheet inner edge by magnetospheric compression associated with the sudden commencement temporarily disrupts the normal Birkeland current pattern. Normal Birkeland currents and shielding reassert themselves in about an hour.

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