南欧上空的北极光
(原标题: Northern Lights over Southern Europe)
2023-04-25
浏览次数: 12
你在过去的两个晚上看到极光了吗？许多不住在地球极北地区的人都住在那里。极光的报告不仅来自美国北部的阿拉斯加，而且远至南部的德克萨斯州和亚利桑那州。一个巨大的椭圆形极光也延伸到了欧洲和亚洲。图为昨晚在西班牙中部的Cáceres镇附近拍摄到的令人印象深刻的红色极光。西班牙南部部分地区也出现了极光。这些极光是由几天前发生在太阳上的强烈日冕物质事件（CME）引起的。日冕物质抛射的粒子在与地球磁层相撞之前穿过了太阳系内部。从那里开始，电子和质子沿着地球北部的磁力线盘旋而下，与地球大气中的氧和氮相撞，产生了风景如画的极光。我们异常活跃的太阳可能会提供未来在南方天空看到北极光的机会。
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Did you see an aurora over the past two nights? Many people who don't live in Earth's far north did. Reports of aurora came in not only from northern locales in the USA as Alaska, but as far south as Texas and Arizona. A huge auroral oval extended over Europe and Asia, too. Pictured, an impressively red aurora was captured last night near the town of Cáceres in central Spain. Auroras were also reported in parts of southern Spain. The auroras resulted from a strong Coronal Mass Event (CME) that occurred on the Sun a few days ago. Particles from the CME crossed the inner Solar System before colliding with the Earth's magnetosphere. From there, electrons and protons spiraled down the Earth's northern magnetic field lines and collided with oxygen and nitrogen in Earth's atmosphere, causing picturesque auroral glows. Our unusually active Sun may provide future opportunities to see the northern lights in southern skies.
© Lorenzo Cordero