Coincidence of the Explosive Phase of Solar Flares with 10.7-cm. Solar Noise Bursts

Abstract

THE observational evidence of an explosive phase in the development of the solar flare, as reported by Athay and Moreton¹, is of great interest. This phase appears after the commencement of the flare, is well defined, and thus provides a stage in the evolution of certain flares which may be of significance for examination of flare-related phenomena, such as solar noise bursts, etc. The Athay and Moreton paper lists eleven selected flares with ‘explosive’ phases. Two of these flares occurred outside the normal observing period at Ottawa, but the remaining nine can be compared with 10.7-cm. solar noise bursts observed at Ottawa. These cases, while few in number, sharpen the already well-established close relationship between flares and 10.7-cm. radio bursts which have been derived from other work done on the Ottawa data².