"2023 Marks a Year of Decreased Seismic and Geyser Activity in Yellowstone"
The Yellowstone Volcano Observatory (YVO) reported that geological activity in Yellowstone National Park in 2023 was relatively calm, with about 1,600 earthquakes recorded, most of which were minor. Notable events included hydrothermal unrest on Geyser Hill and the first eruption of Giant Geyser since 2019. Ground deformation continues with the caldera subsiding at a rate of 1 inch per year. New research on the magma chamber beneath the caldera has revealed the presence of horizontally elongated sills with up to 28% melt fraction, which could enhance eruption forecasting.