We present preflare activity associated with an eruptive flare. For this work we have analyzed high temporal (about 1 minute) and spatial (about 1 arcsec) resolution images taken by SOHO/MDI, BBSO H-alpha centerline and blue wing, and TRACE 1600 UV images. We found that there were several transient brightenings seen around the preflare phase. They took place near one footpoint of the filament and were associated with cancelling magnetic features (CMFs) as well as recurrent EUV ejections. The flux variations suggest that the flux cancellation may have been driven by the flux emergence and/or shearing motions. The above results imply that the preflare activity is caused by lowatmospheric reconnections. For this event, we estimated the ejection speeds of the associated filament ranging from 10 to 160 km/s for the first twenty minutes. It is noted that the initiation of the filament eruption (as defined by the rise speed of about 10 km/s) was coincident with the preflare activity characterized by UV brightenings and CMFs. Our results support that the initiation of the filament eruption be physically related to low-atmosphere magnetic reconnection.
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机译：我们提出与爆发耀斑相关的前列活动。对于这项工作，我们已经分析了SoHO / MDI，BBSO H-α中心线和蓝翼拍摄的高时（约1分钟）和空间（约1个arcsec）分辨率图像，以及跟踪1600紫外线图像。我们发现预制阶段周围有几种瞬态发光。它们在灯丝的一条脚下进行，并且与取消磁性（CMF）以及复发性EUV喷射有关。磁通态变化表明，磁通消除可能是由助焊剂出现和/或剪切运动驱动的。上述结果意味着前议性活动是由低移动性重新连接引起的。对于此事件，我们估计了第20分钟的相关灯丝的喷射速度为10至160 km / s。注意，长丝喷发的开始（如约10km / s的上升速度限定）与由UV发光和CMF的预制活动相结合。我们的研究结果支持，灯丝喷发的启动与低气氛磁性重新连接有关。
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