Flare-time sudden enhancements of low frequency field strength and associated meter wave solar radio bursts

Abstract

A number of meter wavelength solar radio bursts of spectral Type-III have been observed by means of a solar radio spectroscope (40-240 MHz) simultaneously with sudden enhancements of low frequency (164 KHz) field strength (SES's) of Radio Tashkent which are known to take place due to the enhancements of D-layer ionization caused by flare-time solar X-rays. The association between the solar X-ray flares as detected by the SES's and the Type-III meter-wave solar bursts is discussed. It is found that the association of SES's and meter wave solar bursts, which implies the ejection of flare-time electrons towards the photosphere as well as corona, is about 72%.