CORRELATION BETWEEN SOLAR MICROWAVE BURSTS AND HARD X-RAY FLARES

Much attention is given to the correlation between solar microwave bursts and hard X-ray flares'The solar microwave bursts with fine structures(FS) at 2.84GHz observed at BAc are compared with hard x-ray flares(HXB)recorded with YOHKOH satellite from Oct. 1991 to Dec.1992.It is found that during this time interval only 12 out of 20 microwave FS events are related with HXB of YOHKOH observation.The June 7,1991 events is analysed.The quasi-period pulsations with an average period of about one hundred seconds which explained with MHD oscillation is found in the descending phase of the event at both 10cm and HXB. Some parameters.of source region are also deduced.