Observations of the Spectrum of High-Intensity Solar Radiation at Metre Wavelength. II. Outbursts

Abstract

Observations are described of the spectrum of outbursts of solar radio-frequency radiation in the frequency range 70-130 Mc/s. In accordance with Part I of this series, an " outburst " is defined as a burst having a particular type of " dynamic " spectrum, characterized by a drift of spectral features, with time, towards the lower frequencies at a rate of the order of � Mc/s. per second. The observed outbursts are shown to have a close connexion with solar flares and their geophysical accompaniments. �� The spectra are tentatively interpreted in terms of the motion of a physical agency in the solar atmosphere. The possible identification of the agency with " surge " prominences and the corpuscular streams that cause a type of terrestrial magnetic storm is discussed. It is shown that the evidence is quite consistent with the hypothesis that the agency corresponds to the magnetic storm particles.