The blue water spring is about 13 feet in diameter and 1 foot below the rim, USGS said. The water in the pool was measured at 109°F.

A new light blue hot spring has formed in Yellowstone’s Norris Geyser Basin after months of small hydrothermal explosions. Discover how scientists tracked this

A surprising discovery at Yellowstone National Park has geologists buzzing! During a routine temperature check at the Norris Geyser Basin, scientists stumbled upon a brand new thermal pool—light blue in color and about 4 meters wide.