太阳NOAA6891活动区磁中性线的分析

AN ANALYSIS OF THE MAGNETIC INVERSION LINES IN SOLAR ACTIVE REGION NOAA 6891

太阳活动高产区NOAA6891是一个岛型δ黑子，它有5条中性线，表现出不同的性质．其中第3条的横场比较弱，但是由于有剪切，所以有耀斑活动．而第2条中性线的横场较大，剪切得非常厉害，所以在这个区域产生了大量的耀斑，包括2个白光耀斑．正因为如此，所以要对磁场作三维分析，其中用磁场拓扑界面来分析是一种好的途径．

The superactive region NOAA 6891 is an : island' delta-sunspot. There are five magnetic inversion lines in it. Across the 2nd and 3rd invedon lines there are highly sheared field configurations, and at there two places a lot of flares occurred.Especially near the 2nd inversion line, two white-light flares were produced. Magnetic inversion lines have different characteristics. This is due to their different magnetic circumstances. So we should study three-dimensional magnetic fields, and it is a useful way to study the magnetic topology separatrices.