Abstract
Observations of bi-polar type I storm centers with the Culgoora radioheliograph operating at 80 MHz show that in many cases they are not oriented as we should expect for emission in the ordinary mode and for the simplest magnetic field geometry. We interpret this as evidence for a twist in the magnetic field.
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McLean, D.J., Sheridan, K.V. Radio evidence of twisted bi-polar magnetic fields in the solar corona. Sol Phys 26, 176–182 (1972). https://doi.org/10.1007/BF00155118
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DOI: https://doi.org/10.1007/BF00155118