MERIDIONAL FLOW AND ROTATION OF ACTIVE REGIONS

Meridional flow and rotation are studied using high-resolution magneto grams taken during the year 1988 with the NSO Vacuum Telescope on Kitt Peak. Motions are determined by a two-dimensional crosscorrelation an alysis of 107 pairs of consecutive daily observations. The analysis wa s done first with active regions included and repeated with active reg ions excluded. The difference between the two analyses provides an est imate of the motions of active regions. I find that active regions rot ate slower than small magnetic features and that active regions show a meridional flow toward the mean latitude of activity.