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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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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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Related words
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
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