Last Updated
：2025/11/29
black aurora
Noun
Japanese Meaning
均一に明るいオーロラ内に埋蔵された構造体で、光放射が大幅に低下しているため、主に東へ漂移するパッチまたは弧状の形態を呈する現象
（ plural ）
（ plural ）
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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.
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black aurora
During last night's geomagnetic storm, observers reported a drifting black aurora that crossed the sky as a dark arc within the otherwise bright auroral curtain.
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During last night's geomagnetic storm, observers reported a drifting black aurora that crossed the sky as a dark arc within the otherwise bright auroral curtain.
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