我国北方多地迎来新年首场“极光秀”

Core Viewpoint - The first aurora display of the new year was observed in several northern regions of China due to a geomagnetic storm that occurred on January 20, with significant intensity noted [1][2]. Group 1: Geomagnetic Storm and Aurora - A geomagnetic storm is caused by the interaction of charged particle flows from the sun with the Earth's magnetic field, primarily triggered by coronal mass ejections (CME) [2]. - The geomagnetic storm on January 20 was classified as a "super level," providing a great opportunity for aurora enthusiasts to witness vibrant auroras [2]. Group 2: Observations and Experiences - Aurora enthusiasts reported varying experiences; some, like Wang Junfeng in Beijing, were unable to see the aurora despite waiting for hours, while others in regions like Hami, Xinjiang, were able to observe colorful auroras [4][6]. - Observations indicated that the auroras featured colors such as red, orange, and green, although cloud cover affected visibility for some observers [6]. - The auroras were noted to be particularly beautiful in areas like the Eerguna Wetland, with reports of long-lasting displays due to the influence of two CMEs [6].