The Norris Uplift Anomaly
IFLScience • • science
Key Points:
- The Norris Uplift Anomaly (NUA), a 29-kilometer area along Yellowstone's north caldera rim, has recently started deforming again, with ground uplift detected since July last year.
- Ground deformation at Yellowstone is caused by magma movement beneath the surface, leading to cycles of uplift and subsidence driven by changes in pressure from magma, gases, and hydrothermal fluids.
- The NUA previously showed uplift from 1996 to 2004, subsidence until 2013, then rapid inflation followed by subsidence after a magnitude 4.9 earthquake in 2014, before calming down around 2020.
- Recent uplift and increased seismic activity near the NUA are similar to past patterns and are considered
