Some Observations of the H and K Lines in the Solar Spectrum During a Magnetic Storm

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Abstract
An account is given of some photometric observations of the region near the H and K lines in the solar spectrum. Oiie of the plates was taken on 1946 February 7 shortly after the commencement of a violent magnetic storm. An attempt is made to detect possible spectroscopic effects of the moving cloud of particles coming from the Sun. Profiles are derived for both the H and K lines, and slight indications are found of the existence of a small depression in the violet wings of both H and K on the critical date which would represent a velocity of the cloud of particles of some 750 km./sec.