FIARE ACTIVITY AND EVOLUTION WITHIN AR5629

The middle ten days of August,1989 was one of the peak times of solar activity.During the period the solar indices such as 10cm radio flux,relative sunspot number,spot area,X-ray flux,proton fluence and electron fluence had a evidently rising.Espec-ially,the X-ray background flux went so far as to C7.9 on Aug.16.The main reason for this was that the flares of AR5629 had a surprisingly activity.