Polar light type aurora

Japanese: 極光帯型オーロラ - きょっこうたいがたおーろら
Polar light type aurora

...(1) Polar cap glow aurora: A very faint, vague, shapeless light that appears in the polar caps (higher latitudes than the polar light zone) of the Earth prior to a magnetic storm. It is characterized by stronger (red) and (blue) light emitted by hydrogen than other auroras. (2) Polar zone aurora: An aurora unique to the polar light zone (an area that passes through Alaska, Canada, southern Greenland, and the ocean off the coast of Siberia in the Northern Hemisphere), with strong red, green, blue, pink, or reddish purple light emitted by oxygen and nitrogen molecules and atoms. Polar zone auroras generally have a clear shape and are the most prominent auroras, so the term aurora generally refers to the polar zone aurora. ...

*Some of the terminology used to refer to "polar light aurora" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…(1)極冠グローオーロラ 磁気あらしに先立って地球の極冠地方(極光帯より高緯度の地方)に現れる,ごく薄いぼんやりした不定形の光で,水素の放出するHα線(赤),Hβ線(青)などの光が他のオーロラに比べて強いのが特徴である。(2)極光帯型オーロラ 極光帯(北半球ではアラスカ,カナダ,グリーンランド南部,シベリア沖の海上などを通る領域)に特有のオーロラで,酸素や窒素の分子,原子などが発する赤,緑,青,ピンクあるいは赤紫などの光が強い。極光帯型オーロラは概して形もはっきりしており,最も顕著なオーロラで,一般にオーロラといえば極光帯型オーロラを指すものと考えてよい。…

※「極光帯型オーロラ」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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