Also known as SAA
area in South Atlantic where the Earth's magnetic field is weakest relative to an idealized dipole, so that the inner Van Allen radiation belt comes closest to the Earth's surface (altitude 200 km), exposing satellites to higher-than-usual radiation
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南大西洋異常區(South Atlantic Anomaly)是地球上一片地磁最弱的區域，覆蓋範圍遍及南美洲南部及南大西洋海域。由於該區的地磁較其他地區弱，阻擋太陽粒子的范艾倫輻射帶在該區域上空形成一凹陷部份，容讓粒子可以到達更接近地球的位置，導致穿越該區域上空的人造衛星受粒子影響而出現運作異常。
Abstract from DBpedia / Wikipedia · CC BY-SA
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).