A high resolution study in time,position, intensity,and frequency of the radio event of January 14, 1971

A high resolution study in time, frequency, position, and intensity was made at 169 MHz and neighbouring frequencies of the solar radio event of 1971, January 14, 11^h 20^m–30^m UT. The event consisted of two closely resembling groups of type III bursts and type II like details.Before, during, and after the outburst a stationary type IV continuum was seen, with small amplitude pulsating structure. The size of the pulsating structure (which was located inside the continuum) was considerably smaller than the continuum size, and in agreement with an explanation by fluctuating magnetic inhomogeneities inside the continuum source.The continuum moved outward after each outburst at a high speed (2–4000 km s^–1). After the second event the continuum source returned inward slowly ( 450 km s^–1). The outward motion is discussed. It can be explained by a combination of the impact of a fast magnetohydrodynamic shock and the injection of highly energetic particles during the event, the required number being also necessary to account for the observed radio flux. The slow returning motion can be related to mhd restoring of the magnetic field configuration.