緑りょく閃せん光こうりょくせんこうMeanings1noungreen flashAn optical phenomenon where a green spot is briefly visible above the sun at sunset or sunrise, under clear atmospheric conditions.夕ゆう日ひが沈しずむ瞬しゅん間かん、水すい平へい線せんに緑りょく閃せん光こうが見みえることがある。At the moment the sun sets, a green flash can sometimes be seen on the horizon.
