Chumak[1987]提出来一个结构参数(文中称为有效距离参数)来定量地描述活动区磁场两极之间相互远离或者相互靠近的程度。这个参数将为定量研究活动区詹场位型演化研究,以及定量研究活动区磁场住型与太阳耀斑,日冕物质抛射等太阳活动的关系等开辟新的思路,Chumak,张洪起和郭娟对于这个参数的研究和应用做了一些研究工作,但是目前对这含参数的应用还不是很多。该文通过实际应用验缸有效距离参数探讨定量太阳活动预报参数的应用。我们将用有效距离参数,总磁通和磁倾角三个参数综合的定量的研究2011年2月15日一次X2.2级耀斑事件的演化情况。
Magnetic field plays a significantrole in solar activities. Most intense flares and fast cornnal-mass-ejections (CMEs) initiate in active regions with cumplex configuration. It is helpful for prediction of solar activities to quantify the complexity of magnetic field of active regions properly.We quantify the magnetic structure with effective distance dE and put forwardthe quantitative classification for magnetic field of solar active regions based ondE. Then using dE, together with other parameters (total flux (Ft),tilt angle(Tilt)),we have carried out some quantitative studies, including studies on ewdutionsof magnetic field of solar active reginns.We use these three parameters to analysis an X2.2 solar flares burst in February 12,2011.