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Caldera Chronicles

Caldera Chronicles is a weekly article written by U.S. Geological Survey Yellowstone Volcano Observatory scientists and colleagues.

Caldera Chronicles

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A beginner's guide to dating (rocks)

A beginner's guide to dating (rocks)

Geologists study the rock record to understand how our world came to be and to try to determine what geologic events might occur in the future. The...

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The 1959 Madison Slide, Part 2: Recovery and remediation

The 1959 Madison Slide, Part 2: Recovery and remediation

Mitigating the effects of the 1959 Madison Slide required a complex response of federal, local, and private organizations. The joint efforts...

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The 1959 Madison Slide, Part 1: A deadly consequence of the Hebgen Lake Earthquake

The 1959 Madison Slide, Part 1: A deadly consequence of the Hebgen Lake Earthquake

As the ground started shaking due to the 1959 Hebgen Lake earthquake, a mountain in Madison Canyon collapsed, devastating the area and causing...

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Exploring 140 years of water chemistry research in Yellowstone National Park

Exploring 140 years of water chemistry research in Yellowstone National Park

Yellowstone’s waters have been a subject of intense study for well over a century. A new database is now available summarizing water chemistry results...

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Small talk: Using tiny pockets of melt in crystals to understand magmatic processes in Yellowstone

Small talk: Using tiny pockets of melt in crystals to understand magmatic processes in Yellowstone

Scientists often strive for a big-picture approach to understanding a given problem. Sometimes, this big-picture thinking requires first zooming into...

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At Beryl Spring, roads and thermal features don’t play well together

At Beryl Spring, roads and thermal features don’t play well together

Road construction is a challenge in Yellowstone for a variety of reasons, including the abundant hydrothermal activity. This challenge is especially...

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Hydrothermal puzzles in the lakes of Lower Geyser Basin

Hydrothermal puzzles in the lakes of Lower Geyser Basin

Sediment from the bottoms of lakes in Yellowstone contain records of past changes to the landscape—including how hydrothermal activity, vegetation...

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What is “normal” earthquake activity in Yellowstone?

What is “normal” earthquake activity in Yellowstone?

A long history of seismic monitoring in the Yellowstone region helps seismologists understand what is normal in terms of earthquake activity. And also...

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Irving Friedman: Pioneer on the global water cycle, Yellowstone’s magma-hydrothermal system, and more

Irving Friedman: Pioneer on the global water cycle, Yellowstone’s magma-hydrothermal system, and more

Irving Friedman (1920-2005) of the U.S. Geological Survey (USGS) was an innovative scientist who impacted many research fields. He is best known for...

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How much CO2 does Yellowstone emit?

How much CO2 does Yellowstone emit?

Assessing carbon dioxide (CO2) emissions at Yellowstone is a challenging task, but careful measurements reveal that the region collectively emits as...

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Seasonal ground motion in Yellowstone

Seasonal ground motion in Yellowstone

Ground deformation measurements are an important volcano and earthquake monitoring tool in Yellowstone. But they also detect changes unrelated to...

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A new monitoring site to track hydrothermal activity in Norris Geyser Basin

A new monitoring site to track hydrothermal activity in Norris Geyser Basin

In summer 2023, YVO scientists established a new monitoring station in Norris Geyser Basin.  The site is the first of its kind in Yellowstone and will...

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Erupting Bore Holes! The Thrills and Chills of 1967–1968 Yellowstone Research Drilling

Erupting Bore Holes! The Thrills and Chills of 1967–1968 Yellowstone Research Drilling

You can learn a lot about the geological conditions of a region through scientific drilling. And that’s exactly what happened at Yellowstone in the...

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Caldera or crater…what’s the difference?

Caldera or crater…what’s the difference?

Is a caldera a landform or a type of volcano?  Turns out, it’s both.  Which can be a little confusing.

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The Yellowstone Volcano Observatory reviews 2023—the year that was!

The Yellowstone Volcano Observatory reviews 2023—the year that was!

Happy 2024! The start of the year means that it is time once again for our annual look back at geological activity and research that occurred in...

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Over a century of Yellowstone River streamflow measurements at Corwin Springs, MT

Over a century of Yellowstone River streamflow measurements at Corwin Springs, MT

Measuring streamflow is critical for assessing the health and status of river systems. One of the longest continuous records of streamflow is just...

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The challenges of conducting scientific research in Bison Country

The challenges of conducting scientific research in Bison Country

Yellowstone National Park is a tapestry of natural wonders, where geysers erupt in spectacular displays, serene lakes mirror the vast skies, and...

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How Yellowstone thermal features get their names

How Yellowstone thermal features get their names

Naming thermal features in Yellowstone is now a careful and deliberate process with significant opportunities for public input, although it once was...

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The Big Buttes of the Eastern Snake River Plain

The Big Buttes of the Eastern Snake River Plain

Big Southern Butte is one of the largest rhyolite domes in the world. Along with its neighboring siblings, it stands in sharp contrast to the sea of...

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Lidar data shed new light on “hidden” geological hazards near the northern entrance of Yellowstone National Park

Lidar data shed new light on “hidden” geological hazards near the northern entrance of Yellowstone National Park

Lidar data have just been released, for the first time, for Paradise Valley and the northern gateway corridor to Yellowstone National Park. These high...

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The Mystery of Flagg Ranch, OR, the case of the unknown ignimbrite

The Mystery of Flagg Ranch, OR, the case of the unknown ignimbrite

Near the south boundary of Yellowstone National Park is a curious ash flow deposit of unknown origin. Geologists from Montana State University took on...

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