A new, rapidly growing hole filled with icy blue water has appeared in Yellowstone National Park's Norris Geyser Basin, raising concerns about potential volcanic activity. People fear that this feature, formed over recent months, may signal ongoing underground shifts in one of the world's most active supervolcanoes.
In April 2025, park geologists inspecting temperature stations at Norris Basin uncovered a startling sight: a 13-foot-wide pool of milky, light blue water. Located just west of 'Tree Island', the pool's presence was entirely new since their last visit. Its creation appears linked to a hydrothermal explosion, but the process behind it was slow and subtle.
