Filter Total Items: 208
Date published: March 23, 2020

Geysers—what exactly are they made of?

Today, we shed light on what makes up geyser cones.

Date published: March 16, 2020

Gassy precursors for geyser eruptions?

Our search for eruption precursors focused on gas emissions at Steamboat Geyser. We made repeated measurements over time to look for sudden changes in gas emissions preceding a geyser eruption.

Date published: March 9, 2020

What's Going on Under Norris Geyser Basin?

If there were an Olympic medal for hydrothermal systems, Norris Geyser Basin would bring home the gold.

Date published: March 2, 2020

The roads less traveled in the Greater Yellowstone Ecosystem

What values do these road-less areas offer for science, for recreation, for wildlife? As public land owners, we all shape the future of the  Greater Yellowstone Ecosystem and other wild landscapes.

Date published: February 24, 2020

Caldera systems—a worldwide family that is more than just Yellowstone!

Did you know that there are similar caldera systems spread across the globe? And many of these are far more volcanically active than Yellowstone!

Date published: February 17, 2020

Yellowstone's shadow

The lack of any basalt in Yellowstone caldera—the existence of a magmatic "shadow"—is good evidence that the rhyolite magma chamber is still at least partially molten.

Date published: February 10, 2020

Seeing Yellowstone in stereo: The importance of monitoring Yellowstone's thermal areas from aircraft photos

Images acquired using inexpensive cameras from airborne platforms can be used to monitor surface changes in thermal areas over a variety of spatial and temporal scales.

Date published: February 3, 2020

Yellowstone's rock record—rolling through much of Earth's time

 Yellowstone National Park contains rock formations that span over half the Earth's 4.6-billion-year lifespan! 

Date published: January 27, 2020

The December 2019 hydrothermal explosion at White Island (Whakaari), New Zealand, and its lessons for Yellowstone

Hydrothermal explosions are the most likely of Yellowstone's various volcanic hazards, and the potential for additional future explosions is not insignificant.

Date published: January 20, 2020

Earthquakes in and around Yellowstone: How often do they occur?

The U.S. Geological Survey produces seismic hazard maps for the United States and the 2018 nationwide long-term assessment shows that the Yellowstone region has some of the highest seismic hazard values in the Intermountain West.

Date published: January 13, 2020

The complicated plumbing of hot springs and steam vents in Yellowstone National Park

Exploration and sampling of Yellowstone's thermal areas indicates that Yellowstone's hot springs often have surprisingly complex plumbing systems. It is not uncommon to find hot spring pools, which have one type of chemistry, and steam vents, which have totally different chemistry, located in close proximity—or even occupying the same space! Learn what happens when these mix or overlap.

Date published: January 6, 2020

Yellowstone—the year 2019 in review

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is...