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The Alaska-Aleutian Subduction Zone hosts the highest concentration of active volcanoes in the U.S. (orange triangles). Of these, several are caldera systems, with three notable examples highlighted (red triangles). Photos of Okmok, Fisher, and Aniakchak Calderas are shown in the lower panels. Digital shaded-relief map of Alaska from the USGS.
The Alaska-Aleutian Subduction Zone hosts the highest concentration of active volcanoes in the U.S. (orange triangles). Of these, several are caldera systems, with three notable examples highlighted (red triangles). Photos of Okmok, Fisher, and Aniakchak Calderas are shown in the lower panels. Digital shaded-relief map of Alaska from the USGS.
Comparison of caldera-forming eruption sizes (by volume of erupted magma) in the U.S., modified from an AVO/USGS figure. Also included for reference is the 1980 eruption of Mount St. Helens. The three caldera-forming eruptions in Alaska are more than 200 times the size of the 1980 eruption of Mount St.
Comparison of caldera-forming eruption sizes (by volume of erupted magma) in the U.S., modified from an AVO/USGS figure. Also included for reference is the 1980 eruption of Mount St. Helens. The three caldera-forming eruptions in Alaska are more than 200 times the size of the 1980 eruption of Mount St.
Infographic giving earthquake, deformation, thermal emission, and geyser statistics for the Yellowstone region for the year 2024. The graphic accompanies the Yellowstone Volcano Observatory 2024 annual report, freely available online at https://pubs.usgs.gov/publication/cir1566.
Infographic giving earthquake, deformation, thermal emission, and geyser statistics for the Yellowstone region for the year 2024. The graphic accompanies the Yellowstone Volcano Observatory 2024 annual report, freely available online at https://pubs.usgs.gov/publication/cir1566.
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.
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.
Google Earth map showing the location of Yellowstone Caldera’s antipode, the Kerguelen Plateau in the southern Indian Ocean, and Heard and McDonald Islands, which host active volcanoes.
Google Earth map showing the location of Yellowstone Caldera’s antipode, the Kerguelen Plateau in the southern Indian Ocean, and Heard and McDonald Islands, which host active volcanoes.
Surface imagery and subsurface electrical resistivity tomography results from Rosette Spring in Yellowstone’s Lower Geyser Basin. A) Site Overview: Google Earth imagery of Sentinel Meadows identifying Rosette Spring, Flat Cone, Steep Cone, and Mound Cone. Red lines denote the five parallel NW-SE electrical resistivity tomography (ERT) survey profiles.
Surface imagery and subsurface electrical resistivity tomography results from Rosette Spring in Yellowstone’s Lower Geyser Basin. A) Site Overview: Google Earth imagery of Sentinel Meadows identifying Rosette Spring, Flat Cone, Steep Cone, and Mound Cone. Red lines denote the five parallel NW-SE electrical resistivity tomography (ERT) survey profiles.
Did you hear that??? Well, Roaring Mountain isn’t quite as loud as it used to be, but it’s still one of the hottest thermal areas in all of Yellowstone National Park!
Did you hear that??? Well, Roaring Mountain isn’t quite as loud as it used to be, but it’s still one of the hottest thermal areas in all of Yellowstone National Park!
What do Yellowstone National Park and your father's brother's nephew's cousin's former roommate have in common? LONE STAR!!!!!
Lone Star is not just an iconic movie hero of the 1980s (and also next year!). It’s an iconic Yellowstone geyser as well!
What do Yellowstone National Park and your father's brother's nephew's cousin's former roommate have in common? LONE STAR!!!!!
Lone Star is not just an iconic movie hero of the 1980s (and also next year!). It’s an iconic Yellowstone geyser as well!
KABOOM! That’s what Yellowstone is famous for – huge explosive volcanic eruptions. There’s really nothing brewing right now, the magma chamber is mostly solid, but there have been quite a few hydrothermal eruptions and small explosions in both Biscuit Basin and Norris Geyser Basin as water in the hydrothermal system flashes to steam.
KABOOM! That’s what Yellowstone is famous for – huge explosive volcanic eruptions. There’s really nothing brewing right now, the magma chamber is mostly solid, but there have been quite a few hydrothermal eruptions and small explosions in both Biscuit Basin and Norris Geyser Basin as water in the hydrothermal system flashes to steam.
Meet a friend of ours. This friend has been monitoring changes of the ground surface in Yellowstone for decades and is so good that it can detect movement of just a few millimeters in magnitude (just a fraction of an inch). The friend? A continuous GPS station!
Meet a friend of ours. This friend has been monitoring changes of the ground surface in Yellowstone for decades and is so good that it can detect movement of just a few millimeters in magnitude (just a fraction of an inch). The friend? A continuous GPS station!
Happy New Year! Let's go back and take a look at the top five geologic stories for Yellowstone in 2025.
Number five: Rumors. It was a year of internet rumors, mostly related to animals fleeing the park, and none of which were true.
Happy New Year! Let's go back and take a look at the top five geologic stories for Yellowstone in 2025.
Number five: Rumors. It was a year of internet rumors, mostly related to animals fleeing the park, and none of which were true.
Just last week, Kīlauea put on another dramatic display of lava fountaining and flows within the caldera, during its 37th episode of this most recent eruption. It doesn't seem like Hawaii and Yellowstone have a lot in common, but actually, those two magmatic systems have a common cause.
Just last week, Kīlauea put on another dramatic display of lava fountaining and flows within the caldera, during its 37th episode of this most recent eruption. It doesn't seem like Hawaii and Yellowstone have a lot in common, but actually, those two magmatic systems have a common cause.
Need time to concentrate or relax? Then listen to the gurgling and bubbly sounds of Steamboat Geyser in Yellowstone National Park, Wyoming. "Steamboat Geyser is the world’s tallest active geyser. It showers watchers and drenches the walkway. Days, months, or years pass between the major eruptions of Steamboat Geyser.
Need time to concentrate or relax? Then listen to the gurgling and bubbly sounds of Steamboat Geyser in Yellowstone National Park, Wyoming. "Steamboat Geyser is the world’s tallest active geyser. It showers watchers and drenches the walkway. Days, months, or years pass between the major eruptions of Steamboat Geyser.
Need time to concentrate or relax? Then listen to the natural sounds of East Chinaman Spring in Yellowstone National Park, Wyoming. East Chinaman Spring is located in the Upper Geyser Basin within Yellowstone National Park, Wyoming.
Need time to concentrate or relax? Then listen to the natural sounds of East Chinaman Spring in Yellowstone National Park, Wyoming. East Chinaman Spring is located in the Upper Geyser Basin within Yellowstone National Park, Wyoming.
Need time to concentrate or relax? Then listen to the natural sounds of Frying Pan Spring in Yellowstone National Park, Wyoming. Frying Pan Spring is a hot spring that sounds like bacon on the frying pan and is located in Yellowstone National Park, Wyoming. Who doesn't love bacon?!
Need time to concentrate or relax? Then listen to the natural sounds of Frying Pan Spring in Yellowstone National Park, Wyoming. Frying Pan Spring is a hot spring that sounds like bacon on the frying pan and is located in Yellowstone National Park, Wyoming. Who doesn't love bacon?!
Need time to concentrate or relax? Then listen to the natural sounds of Kepler Cascades in Yellowstone National Park, Wyoming. Kepler Cascades is located just a couple miles away from Old Faithful within Yellowstone National Park, Wyoming.
Need time to concentrate or relax? Then listen to the natural sounds of Kepler Cascades in Yellowstone National Park, Wyoming. Kepler Cascades is located just a couple miles away from Old Faithful within Yellowstone National Park, Wyoming.
Need time to concentrate or relax? Then listen to the natural sounds of a flowing river through Yellowstone National Park, Wyoming. This audio is from a river below the bridge near the Monument Geyser Trailhead in Yellowstone National Park, Wyoming.
Need time to concentrate or relax? Then listen to the natural sounds of a flowing river through Yellowstone National Park, Wyoming. This audio is from a river below the bridge near the Monument Geyser Trailhead in Yellowstone National Park, Wyoming.
Need time to concentrate or relax? Then listen to the natural sounds of Congress Pool in Yellowstone National Park, Wyoming. Congress Pool is a mud pool/mud pot located in the Norris Geyser Basin in Yellowstone National Park, Wyoming.
Need time to concentrate or relax? Then listen to the natural sounds of Congress Pool in Yellowstone National Park, Wyoming. Congress Pool is a mud pool/mud pot located in the Norris Geyser Basin in Yellowstone National Park, Wyoming.
The camera view is north-northwest from the Biscuit Basin boardwalk looking at Black Diamond Pool, which is in the foreground (the tilted viewing angle is due to the slope of the boardwalk).
The camera view is north-northwest from the Biscuit Basin boardwalk looking at Black Diamond Pool, which is in the foreground (the tilted viewing angle is due to the slope of the boardwalk).
