WHAT IS CALDERA? A caldera is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. The ejection of large volumes of magma in a short time can upset the integrity of a magma chamber's structure by in effect removing much of the chamber's filling material. #jayography #caldera #geography #maps #educationalcontent | Jayography

🚨 BREAKING NEWS: YELLOWSTONE GROUND RISING AGAIN USGS has just confirmed new uplift at Yellowstone. On January 12, 2026, the Yellowstone Volcano Observatory published a Caldera Chronicles article on the Norris Uplift Anomaly, a deformation zone on the north rim of the Yellowstone caldera, just south of Norris Geyser Basin. Since July 2025, an area on the north rim of the caldera, just south of Norris Geyser Basin, has risen by about 2 to 3 centimeters, roughly one inch. Satellite radar and GPS