Abstract

The effects of non-field-aligned diffusion (i. e., terms in the diffusion tensor proportional to the antisymmetric coefficient κA) on the observed day-to-day deviation of the diffusive diurnal anisotropy from the daily average magnetic field direction are considered. Using reasonable parameters for the diffusion of cosmic rays in interplanetary space, I show that these terms give a natural explanation for the angular difference between the anisotropy and field directions during normal quiet interplanetary epochs.

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