black aurora
A structure that is embedded in a uniformly bright aurora, where its optical emission is significantly reduced, presenting as either patches or arcs that mainly drift eastwards.
plural of absinth
Archaic form of frangipani.
plural of Theriault
昨夜の磁気嵐の間、観測者たちは明るいオーロラに埋め込まれ、光の放出が著しく低下した暗い斑点が弧となって空を横切り、主に東へドリフトするのを報告した。
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