Longer-lived structures showing only those that are likely associated with chromospheric activity.
Enhanced by a spatial differencing technique, this movie of the north polar region (see movie 1) "removes" the larger, longer-lived structures to show only those that are small, dynamic and likely associated with chromospheric activity.
Credit: Scott McIntosh, Bart De Pontieu, Viggo Hansteen and Karel Schrijver/UCAR. Permission granted for non-commercial, non-profit research or educational purposes only. Contact UCAR for permissions regarding additional use.