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 ...

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 ...

The water in the pool, which is light blue in color, was measured at 109°F. USGS said satellite images indicate the spring formed in a series of events between December 2024 and February 2025.