METHOD
In both magnetograms a total of 28 MMFs pairs have been selected. Each
pair was reliably defined by two successive magnetograms. We
selected only well-isolated MMFs pairs.
Orientation angle is defined as a smallest angle measured in
direction from N polarity element to the sunspot radius and is a
positive number when the measurement is made in the counter-clockwise
direction.
©BBSO/NJIT Seminar on OCT 99, 2000