Abstract
IN supplement to my letter in the last issue of NATURE I may add that if a solar outburst, acting in the way supposed, causes a magnetic storm which lasts eight hours, the effective influence of the whole group of electric streams at the distance of the earth must extend over a breadth of about six million miles; so that if simply conical, with vertex at the sun's centre, the angle of the cone would be four degrees. Projected back to the surface of the sun, this would correspond to what we may call a “spot” about one-thirtieth of the visible disc in diameter; but, inasmuch as the trajectory of the particles in the beam would be slightly curved, the size of the actual solar eruption could be much less.
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LODGE, O. Magnetic Storms. Nature 81, 456 (1909). https://doi.org/10.1038/081456a0
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DOI: https://doi.org/10.1038/081456a0
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