Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Michael Poland, geophysicist with the U.S. Geological Survey and Scientist-in-Charge of the Yellowstone Volcano Observatory.

Front cover of the Yellowstone Volcano Observatory 2024 annual report, which includes a summary of earthquake, deformation, and geyser activity, as well as research investigations and other information. The report is freely available online at https://pubs.usgs.gov/publication/cir1566 . Cover photograph is of July 23, 2024, hydrothermal explosion at Black Diamond Pool, Biscuit Basin, Yellowstone National Park, by Sabrina Harris.

The year 2024 will probably be remembered as the year of the hydrothermal explosion, with one event that was unwitnessed but detected by geophysical sensors at Norris Geyser Basin in April, and another that was experienced by numerous people in Biscuit Basin in July.…