3个太阳活动区中的水平和垂直电流与耀斑的关系

对3个超级活动区（大的δ型黑子群）NOAA 5395、6659、6891中的电流分布作了系统计算；利用已发表的计算方法，首次用于实际活动区的水平电流分布；给出了电流与耀斑核的关系。将这种关系分为两类：密切相关和准相关，并同时给出了统计结果。结果显示：1）对于垂直电流和水平电流来说，密切相关率分别是29％和10％，准相关率分别是50％和30％；2）有些耀斑核与两种电流都相关，而大多数只与其中一种相关；3）与两种电流都不相关的耀斑核只占6％左右；4）两种电流起互补作用，因而对于预报耀斑具有一定的作用。通过分析还发现，磁场剪切强的地方相应于强的垂直电流，而磁中性线附近纵向磁场梯度大的地方相应于强的水平电流。

Transverse and Longitudinal Current Densities Related to Solar Flare Sites in Three Active Regions

In this paper, we systematically calculate the distribution of the current density in three superactive regions (isolated large spots) NOAA 5395, 6659, 6891. The transverse current is for the first time included by using a simple algorithm. The main purpose is to analyse the spatial correlation between flare kernels and the current. The correlation between the current and the flare kernels is classified into two categories: intimately-correlation and quasi-correlation. We analyse three superactive regions and give a statistical result. For these active regions a statistical result is given showing that:1) The intimately-correlation rate is about 29% and 10% for logitudinal and transverse current while the quasi-correlation rate is about 50% and 30% respectively.2) Some flare kernles are correlating with both currents while most of them are correlating with one of them.3) The numbers of flare kernels which fail to correlate with both current is only about 6% on average.4) The areas of both current peaks are compensated for one another which are very useful in the prediction of solar flare sites. Through analysis, it is shown that J peak regions are contained in high magnetic shearing areas while J peak regions belong to mixed polarity areas or are near the magnetic inversion line.