Recently, a rare red-and-green aurora was observed above Sayram Lake in Xinjiang, drawing widespread attention. Auroras typically occur in high-latitude regions near the Arctic Circle, making this vivid display at approximately 44°N exceptionally unusual. Experts attribute the phenomenon to intense solar activity: powerful solar flares released a surge of charged particles, triggering a geomagnetic storm that expanded the auroral oval toward lower latitudes. The red and green colors result from excited oxygen atoms emitting light at different altitudes—red above 200 km and green around 100 km. Located on the northern slopes of the Tianshan Mountains, Sayram Lake offers ideal viewing conditions due to its high elevation, minimal light pollution, and pristine air. This celestial spectacle has attracted photographers and tourists alike, while also highlighting the importance of space weather awareness. Scientists urge enhanced monitoring of solar activity to better predict and mitigate potential disruptions to communication and navigation systems caused by geomagnetic disturbances.
近日，新疆赛里木湖上空出现罕见的红绿双色极光现象，引发广泛关注。通常，极光多见于高纬度地区如北极圈附近，而此次在北纬约44度的赛里木湖观测到清晰可见的极光，实属罕见。专家分析，这一现象与近期太阳活动剧烈密切相关——太阳爆发强耀斑并释放大量带电粒子，形成地磁暴，使极光范围向低纬度扩展。红绿色极光的成因在于不同高度大气中的气体分子受激发后发出特定波长的光：氧原子在高空（约200公里以上）发出红光，在较低空（约100公里）则呈现绿色。赛里木湖地处天山北麓，海拔高、光污染少、空气洁净，为观测极光提供了理想条件。此次奇观不仅吸引众多摄影爱好者和游客前往打卡，也再次提醒公众关注空间天气对地球环境的影响。科学家呼吁加强太阳活动监测，以更好预测和应对可能影响通信、导航等系统的地磁扰动。
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