Shadow band

Japanese: 影帯 - えいたい(英語表記)shadow band
Shadow band
During a total solar eclipse (→ total eclipse), just before and after the eclipse, and during an annular eclipse, stripes of light and dark perpendicular to the direction of the Moon's umbra can be seen marching across the Earth. These stripes are called shadow bands. Shadow bands are caused by irregular refraction of light from the remaining part of the Moon by the Earth's atmosphere, just like the twinkling of stars. The stripes are not necessarily regular, and often move around discontinuously.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
皆既日食 (→皆既食 ) の食既直前および皆既終了直後,また金環食の場合には金環の最中も,月の本影の進行方向に垂直な明暗の縞模様が地上を行進するのが見られる。この縞模様を影帯という。影帯は細長い欠け残りの部分からくる光の地球大気による不規則な屈折現象であり,星のまたたきと同じ現象である。縞は必ずしも規則正しくはなく,不連続的に動き回る場合が多い。

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