Overview
- The deformation centers along the caldera’s north rim near the Norris Geyser Basin and Gibbon Falls, covering an area roughly 19 miles across.
- USGS and Yellowstone Volcano Observatory data show about 2 centimeters of uplift since July 2025, a pace detectable by instruments but not by visitors.
- Monitoring uses satellite radar and a dense GPS network, including 17 stations in the park, enabling near‑real‑time tracking of small surface changes.
- Similar non-eruptive uplift episodes were recorded in 1996–2000, 2004, and 2020, providing historical context for the current activity.
- Recent seismicity has been on the low end of Yellowstone’s normal range, with 1,119 earthquakes last year, and USGS attributes the uplift to deep magmatic processes estimated about 10 miles below the surface.