Abstract
A CORRELATION has been found between the aurora observed on November 19, 1949, and the increased cosmic ray activity recorded on the same day. A solar flare of importance 3 was observed during 1029–1119 G.M.T. at the Wendelstein Solar Observatory, Bavaria, Germany1. The flare was also reported by the Royal Observatory, Edinburgh, where it was noticed2 that the width of the Hα line in emission was abnormally large, 22.9 A., and that while there was an intense burst of solar radiation, “the position [of this flare] was unfavorable for a directive stream of solar corpuscles to impinge upon the earth”.
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GERSON, N. Correlation of Auroras with Increased Cosmic Ray Intensities (November 19, 1949). Nature 167, 894–895 (1951). https://doi.org/10.1038/167894a0
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DOI: https://doi.org/10.1038/167894a0
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