Abstract
A magnetic loop located beyond 20 R ⊙ appears to be the later evolution of an expanding magnetic arch observed at 2 r ⊙. The expansion speed is of the order of 100 km s−1.
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References
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Stone, R.G., Fainberg, J. Radio evidence for an expanding magnetic arch beyond 20 solar radii. Sol Phys 42, 179–181 (1975). https://doi.org/10.1007/BF00153294
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DOI: https://doi.org/10.1007/BF00153294