Relationship between magnetic field evolution and major flare event on July 14, 2000
Relationship between magnetic field evolution and major flare event on July 14, 2000
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DOI：
10.1051/0004-6361:20010550
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发表时间：
2001-06
影响因子：
6.5
通讯作者：
Yu Liu;Hongqi Zhang
中科院分区：
文献类型：
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作者：
Yu Liu;Hongqi Zhang
. 2000年7月14日，活动区NOAA 9077产生了近年来最大的太阳战神之一（3B/X5.7），与猛烈的日冕物质抛射（CME）有关。它具有（cid：12）γ（cid：14）磁类阳离子，黑子群和磁场的形态每天都有明显的变化。本文根据对自行的精确测量，给出了7月14日黑子大尺度运动与主黑子运动的关系。我们（cid：12）认为：（1）特殊的磁形态和快速、连续的碎裂使活动区始终处于高剪切状态，（2）黑子群的运动方向与（cid：12）黑子被剪切激活的位置在空间上有很好的对应关系;（3）快速形成的太阳系的运动特征表明，黑子运动与最大黑子战神有很好的相关性，这表明，7月14日开始的双带双束流是由连续出现的双束流系统推动的。密集的大射电暴总是与一个新出现的磁射电暴系统密切相关（K（cid：19）alm（cid：19）an 1997）。这一结论说明，在大规模战神中，（cid：14）-（cid：12）-（cid：14）
. On July 14, 2000 the active region NOAA 9077 produced one of the largest solar flares (3B/X5.7) seen in recent years associated with a violent halo coronal mass ejection (CME). It had a (cid:12)γ(cid:14) magnetic classi(cid:12)cation and the morphology of the sunspot group and magnetic (cid:12)eld changed obviously every day. We present here the relationship between the large scale motions of the spots and the major flare on July 14, based on precise measurements of the proper motions. We (cid:12)nd that: (1) The special magnetic morphology and quick, successive fragmentation caused the active region to be always in a high shear con(cid:12)guration; (2) There is a good spatial correspondence between the direction of the movement of one spotgroup and the place where the (cid:12)lament was cut o(cid:11) and activated; (3) The motion characteristics of the rapidly emerging flux system showed a good correlation between spot motions and the largest flares, suggesting that the initiation of the two-ribbon flare on July 14 was promoted by the successive emergence of the flux systems. The intensive major flare was always connected strongly with a newly emerging magnetic flux system (K(cid:19)alm(cid:19)an 1997). This con(cid:12)rms that (cid:14) -con(cid:12)gurations and dynamical processes are important in large flares.