Images

Map of horizontal velocities between July and December 2025 at Global Positioning System (GPS) stations P711 and NRWY (arrows and yellow circles) in the area between Norris Geyser Basin and Madison Junction. Dashed red line indicates boundary of Yellowstone Caldera and gray lines are roads.

The 2013–2014 Norris Geyser Basin (NGB) uplift and associated earthquakes.

Hot spring located along the trail to the Grand Prismatic Spring overlook shown before and after the Yellowstone National Park Geology Program team cleaned the feature of sticks and rocks that were thrown in by visitors.  National Park Service photos by Margery Price, July and September 2025,

Geological conditions in Yellowstone National Park during borehole microbiological study in 2021. Top panel (a) shows a map view of Yellowstone National Park, with different map colors representing water bodies and various rock types.

Plot showing total energy absorbed from earthquakes throughout the May to November 2021 sampling period of a microbial study in Yellowstone National Park. The five different sampling windows are distinguished by shading, and Julian Day is the number of the day within the year (so Julian Day 200, for example, was July 19, 2021).

Changes in concentrations of hydrogen (H2), sulfide (HS-), and cells, and the accumulated seismic energy during May–November 2021, when microbial samples were collected from a borehole near West Thumb in Yellowstone National Park.

Mike Stickney in front of one of the original seismograph drum recorders for the Montana Regional Seismic Network at the Montana Bureau of Mines and Geology Earthquake Studies Office. Today all earthquake data in Montana are recorded digitally from a large network of about 50 stations, including many telemetered broadband stations.

Infographic showing the numbers, styles, colors, and other data regarding hats recovered from thermal areas by the Yellowstone National Park Geology Program in 2025.  Designed by Margery Price, Yellowstone National Park.

Map view of relocated Yellowstone seismicity recorded during 2008-2022, colored by time, on the left.  White line gives the outline of Yellowstone caldera. The A-A’ cross section through Yellowstone Lake is shown at the right and illustrates how seismic swarms that are distinct in time relate to one another.  Adapted from Florez and others, 2025 (

Interferogram created from satellite radar data collected on October 7, 2024, and October 2, 2025, over the Yellowstone region by the Sentinel-1 satellite system. Colored fringes indicate a change in distance (called range change) between the satellite and ground surface that is caused by surface deformation during the time spanned.

Map of seismic stations in the Yellowstone region, with numbers of channels indicated by number and sensor type by color.  Inverted triangles indicate stations operated by University of Utah Seismograph Stations (UUSS), and squares indicate stations operated by other agencies.

EarthScope engineers Brendan Hodge (left) and Lia Lajoie (right) perform upgrades at the WLWY (White Lake) continuous GPS station in Yellowstone National Park.  The white box contains the receiver, while the barrel on the ground contains batteries.  The tower holds the solar panels, as well as a cellular modem and meteorological sensors that were recently

Just some of the hats collected by the Yellowstone National Park Geology Program from sensitive thermal areas throughout the park in 2025.  National Park Service photo by Margery Price, September 3, 2025.

USGS geologists Mark Stelten (pictured) and Nicole Thomas collect a sample of what is potentially a newly recognized lava flow exposed along the Gibbon River. USGS photo by Nicole Thomas, September 2025.

Plot of temperatures measured by continuous loggers at Guardian Geyser (light red) and Valentine Geyser (dark red) on August 24, 2025. Activity at Guardian Geyser included episodic splashing for a few hours prior to the near-simultaneous eruptions of both geysers just after 6:30 a.m. MDT on this date.  Data collected by Mara Reed, Yellowstone National Park.

Photo of Valentine Geyser and Guardian Geyser in eruption on August 7, 2025. Valentine Geyser is in the rear of the alcove, and Guardian Geyser is at the alcove’s mouth, closer to the camera. Visitors on a trail below the Norris Geyser Basin Museum can be seen at the top of the image. Photo by Carol Beverly, used with permission.

Yellowstone National Park Geology Program volunteer Tara Cross smiles and shows off a pizza box found on Geyser Hill in Upper Geyser Basin. National Park Service photo by Margery Price, August 2025.

A researcher holds a vibrant green sample of thermophilic cyanobacteria collected from a hot spring in Yellowstone’s Lower Geyser Basin. National Park Service photo by Samantha Hilburn, August 2025.

A researcher collects a sample of thermophilic cyanobacteria from a hot spring in Yellowstone's Lower Geyser Basin. National Park Service photo by Samantha Hilburn, August 2025.

Yellowstone National Park Geology Program team member Mara Reed uses a long grabber pole to remove a park map, presumably blown from a visitor's hand or pack by the wind, from a feature in Upper Mammoth Terraces. National Park Service photo by Samantha Hilburn, August 2025.

Yellowstone National Park Geology Program team member Margery Price installs a thermal danger sign near Maiden’s Grave Spring along Fountain Flat Drive. National Park Service photo by Samantha Hilburn, August 2025.