Geomagnetic effect associated with X-ray flare from Sco X-1

Abstract

The possibility is examined that an X-ray flare from Sco X-1, detected during a balloon flight in 1967, had a daytime geomagnetic effect. There was uncertainty as to the cause of the geomagnetic effect because of a simultaneous solar flare. The observed time lag between solar flare and geomagnetic effect (33 min), which is greater than that typical of SFEs or crochet events, as well as the observed production rates attributable to Sco X-1 (which are comparable to those attributable to cosmic rays and L-alpha radiation), indicate that the observed geomagnetic perturbation was a genuine effect of the X-ray flare from Sco X-1.