受地磁活动影响，11月12日17时30分左右，黑龙江大兴安岭地区加格达奇区迎来极光美景。极光是太阳带电粒子进入地球磁场时，与大气中的原子和分子碰撞激发产生的发光现象，通常在地球南北两极附近地区夜间高空出现。当地磁指数较高时，在我国大兴安岭等中高纬度地区也会出现。（总台记者 李鑫）

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