Mysterious circles in the highest lake in the world

Lake Baikal (Russian: Baygal nuur, meaning “the rich lake”) is in southern Siberia in Russia, located between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast, near the city of Irkutsk. It is also known as the “Blue Eye of Siberia”. It contains more water than all of the North American Great Lakes combined.

At 1,637 meters (5,370 ft), Lake Baikal is the deepest lake in the world, and the largest freshwater lake in the world by volume.

These two terms are the focal point to break the ice and can be caused by the rise of warm-water lake. Dark circles is due to thinning of the color of ice, which usually remains until June.

The rise of warm water does not seem to be something strange in some of the relatively shallow areas of lakes (for example), which was marked by hydrothermal activity. For example, when a circle is formed in the middle of the lake (see photo below). Such circles have been observed in 1985 and 1994, although they were not so pronounced. However, the location of the circle near the southern tip of Lake (pictured above), where the water is relatively deep and cold.