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The effect of a distorted interplanetary magnetic field configuration on the December 7-8, 1982, ground level enhancement
Citation
Cramp, JL and Duldig, ML and Humble, JE, The effect of a distorted interplanetary magnetic field configuration on the December 7-8, 1982, ground level enhancement , Journal of Geophysical Research-Space Physics, 102, (A3) pp. 4919-4925. ISSN 0148-0227 (1997) [Refereed Article]
Abstract
The cosmic ray ground level enhancement (GLE) of December 7-8, 1982, occurred when the interplanetary magnetic field (IMF) direction measured near Earth indicated significant distortion from the nominal form. We have modeled the ground level response to this event to derive rigidity spectra and pitch angle distributions centered on apparent arrival directions. A deficit region associated with a near-Earth magnetic cloud-like structure has been modeled during the initial phase of the GLE. Using this modified model, we find agreement between the derived particle arrival directions and the measured IMF directions. We find a significant contribution from pitch angles greater than 90° throughout the event. This is probably due to scattering in the turbulent region behind the cloud-like structure. Copyright 1997 by the American Geophysical Union.
Item Details
Item Type: | Refereed Article |
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Research Division: | Physical Sciences |
Research Group: | Astronomical sciences |
Research Field: | High energy astrophysics and galactic cosmic rays |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the physical sciences |
UTAS Author: | Cramp, JL (Ms Jennifer Cramp) |
UTAS Author: | Duldig, ML (Dr Marc Duldig) |
UTAS Author: | Humble, JE (Dr John Humble) |
ID Code: | 10309 |
Year Published: | 1997 |
Web of Science® Times Cited: | 13 |
Deposited By: | Physics |
Deposited On: | 1997-08-01 |
Last Modified: | 2011-08-11 |
Downloads: | 0 |
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