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Noctelucent Clouds Seething UK

Noctelucent Clouds Seething UK

A rare phenomenon occurring only for a couple of months during June ,July bat latitudes in Northern Hemisphere between 50 - 60 degrees and same in Southern Hemisphere. Ice crystals at an altitude of between 50 to 70 miles up and only when the Sun has set and is 16 degrees below the horizon does it produce a reflective glow of them