"AR6919"

Title:		THE PROPERTIES OF FLARES PRODUCED WITHIN AR 6919
Authors:		B. Sylwester and J. Sylwester
Abstract:		We have analysed the eight flares which occurred in the active region NOAA 6919 during its passage across the solar disc between 8^th and 20^th November 1991. The main data set used consists of X-ray images as recorded by SXT and HXT on Yohkoh. The optical filter images have been available during this early period of SXT operation. Before performing detailed analysis, the SXT images have been deconvolved (resolution increased down to 1 arcsec) and carefully coaligned. The hard X-ray emission pattern has been reconstructed from HXT data using the maximum entropy method (MEM). Hard and soft X-ray images have been coaligned and the locations of hard and soft X-ray sources have been intercompared. Next the time variations of hard and soft maximum brightness locations have been investigated. For the flares reported we noticed distinctive pattern of evolution for both soft and hard X-rays most probably representing the systematic rearrangement of global magnetic field organisation within this active region.