This is a photograph of Twin Buttes in Lower Geyser Basin looking to the northwest, with Excelsior Geyser of Midway Geyser Basin in the foreground. Twin Buttes is a thermal kame that formed when ...

As a tour group in Yellowstone National Park approached the Excelsior Geyser, it came upon the unusual sight of a park ranger with a fishing rod casting into the steaming spring pool as tourists ...

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 ...