Correlation of Solar and Magnetic Phenomena

Abstract

THE circumstances spoken of by Prof. Young, as alluded to in the accompanying letter, tell of special solar activity at the time of magnetic disturbance, observed solar paroxysms occurring apparently in correspondence with magnetic movements; but the question whether definite connection exists, is the really critical point, as in the Carrington observation of 1859. Prof. Young himself says (“The Sun,” p. 159):—“So far as appears, the magnetic action of the sun was instantaneous. After making allowance for longitude, the magnetic disturbance in England was strictly simultaneous, so far as can be judged, with the spectroscopic disturbance seen on the Rocky Mountains.” (The italics are mine.) Without being over-critical, it may be remarked that the terms “instantaneous” and “strictly simultaneous” are somewhat strong, in the circumstances of the case.