A recent geomagnetic storm produced stunning aurora displays over northern China, lighting up the starry sky. The appearance of an aurora results from a fascinating interaction between solar activity and Earth's magnetic field. Starting at 8 a.m. on Wednesday, a geomagnetic storm was detected, with the real-time global geomagnetic activity index (Kp) reaching as high as 9. The geomagnetic storm was mainly triggered by a solar eruption that occurred on Monday afternoon. A coronal mass ejection (C

受20年来最强的S4级太阳辐射风暴影响，1月20日晚至次日凌晨，南极光在澳大利亚多地上空绚丽绽放。从塔州、维州、南澳、西澳到新州，甚至昆州汉密尔顿岛，极光画面刷屏社交网络。专家预测，21日晚还可以看极光。 #极光 #南半球 #AuroraAustralia #澳洲极光 #天文奇观 | SBS中文

Aurora over Norway Northern Lights | Aurora Borealis & Australis