Our results further demonstrate that, in addition to conventional separation motion of flare ribbons and corresponding upward motion of HXR coronal sources, there exists an opposite motion pattern.

• 结果表明：耀斑相偶亮核间距离的时间曲线，与HXR亮度曲线具有相反的相关性，亮核间距离在HXR流量上升阶段会减少；