National Geographic Travelのインスタグラム(natgeotravel) - 7月31日 02時14分

Northern Lights display seen from North Dakota on July 23rd, 2015. This breathtaking event was caused by a strong Kp-5 geomagnetic solar storm which resulted in many Northern Lights sightings in the United States and Canada. The Northern Lights, also known as the #AuroraBorealis, is a natural light caused by the collision of energetic charged particles with atoms in the Thermosphere. Photo by Mike Theiss @ExtremeNature

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