On Saturday evening, southern parts of Finland experienced a stunning red sky just after sunset, captured beautifully by readers of Ilta-Sanomat. According to meteorologist Hannu Valta from the Finnish Meteorological Institute, this phenomenon, known as afterglow, occurred when the weather was clear in the south and the sun had dipped below the horizon.

Simultaneously, clouds situated approximately 5 to 10 kilometers above the north were illuminated by sunlight. Valta explained that the setting sun was able to shine beneath these high-altitude clouds, thereby transforming them into beautiful reddish hues. The red color observed is a result of sunlight traveling through the atmosphere for a longer duration than during the day, effectively filtering out shorter blue wavelengths.

As a result, the remnants of sunlight visible at sunset are predominantly in the red spectrum. This phenomenon not only captivates the beholder with its breathtaking hues but also highlights the intricate relationship between atmospheric conditions and the natural light spectrum, reminding us of the beauty that can be found in our everyday skies.