ナショナルジオグラフィックのインスタグラム(natgeo) - 1月29日 00時35分

An impressive display of lenticular clouds appears right after sunset in northern Iceland in this time-lapse video by @babaktafreshi. Some lenticulars are reported as UFOs due to their flying-saucer shape and bright reflection of the setting sun, moonlight, or city lights. Pilots try not to fly near these dense clouds to avoid turbulence due to a sudden change of air pressure.

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