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Caldera Chronicles

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory.

Caldera Chronicles

Filter Total Items: 424
The story of the Gallatin Range—magnificent mountains northwest of Yellowstone Caldera

The story of the Gallatin Range—magnificent mountains northwest of Yellowstone Caldera

Mountain building occurred all around the Yellowstone region and highlights a tortured geological history of uplift and volcanism.  The Gallatin Range...

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The case of the missing sulfur dioxide at Yellowstone

The case of the missing sulfur dioxide at Yellowstone

Beneath Yellowstone's steaming geysers and fumaroles lies a chemical mystery: where did all the sulfur dioxide go?

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How GPS data navigate from satellites to your screen

How GPS data navigate from satellites to your screen

GPS stations in Yellowstone can clearly show how the ground moves, but this simple measurement requires the data to go on a complex journey.

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Patterns of earthquakes over time in Yellowstone highlight the complexity of seismic swarms

Patterns of earthquakes over time in Yellowstone highlight the complexity of seismic swarms

Applying artificial intelligence approaches to a 15-year-long seismic record reveals how all the small earthquakes that occur in the Yellowstone...

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Was there ever a Yellowstone on Mars?

Was there ever a Yellowstone on Mars?

Yellowstone is not just a fantastic natural laboratory for Earth-based studies.  A better understanding of hydrothermal activity in the first National...

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A mission to repair one of the most interesting GPS monitoring stations in Yellowstone

A mission to repair one of the most interesting GPS monitoring stations in Yellowstone

Many of the monitoring sites in Yellowstone National Park are located in remote areas.  When they go offline, a lot of preparation and effort is...

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How does water from snow and rain get to the numerous hot springs in Yellowstone?

How does water from snow and rain get to the numerous hot springs in Yellowstone?

Water molecules (H₂O) are made of two hydrogen atoms and one oxygen atom, but these atoms aren't always the same. Tracking how these atoms in water...

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Some like it hot! Studying thermophiles in Yellowstone National Park

Some like it hot! Studying thermophiles in Yellowstone National Park

Thermophiles thrive in hydrothermal features where scalding temperatures would burn other life. What can we learn from the unique adaptations of these...

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How to Take a Volcano’s Temperature

How to Take a Volcano’s Temperature

If only we could stick a thermometer into a magma chamber…  That’s not really possible, but fortunately each mineral in a volcanic deposit is like a...

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Hydrothermal hats and visitor safety: Walking in the boots of the Yellowstone National Park Geology Team

Hydrothermal hats and visitor safety: Walking in the boots of the Yellowstone National Park Geology Team

Ever wonder who collects hats blown into Yellowstone hot springs, repairs damage to bacterial mats or thermal ground, and monitors the health of...

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Modernizing geologic mapping in Yellowstone: The role of geodatabases in the field

Modernizing geologic mapping in Yellowstone: The role of geodatabases in the field

Geologic mapping has come a long way—from paper maps to powerful digital databases. But how do researchers store and organize all this data? Join us...

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Cascade volcanoes are so much more than towering peaks

Cascade volcanoes are so much more than towering peaks

Massive volcanoes dot the Cascade Range from British Columbia into Northern California, but what about the space in between the peaks? Volcanoes in...

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To see how the ground moves in Yellowstone, first look at the rest of North America

To see how the ground moves in Yellowstone, first look at the rest of North America

Deformation of Earth’s surface can be very subtle.  Accurately detecting how the ground moves in the Yellowstone area requires the right frame of...

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The many types of fluids that flow in Yellowstone

The many types of fluids that flow in Yellowstone

The are many types of fluids that flow between the deep mantle underlying Yellowstone National Park and the atmosphere above it. These fluids drive...

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Hunting for Sasquatch (events) at Biscuit Basin in Yellowstone

Hunting for Sasquatch (events) at Biscuit Basin in Yellowstone

Sasquatch is a mythical creature with scant evidence to support its existence.  Likewise, eruptions from Black Diamond Pool since last July were...

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No, animals are not leaving Yellowstone National Park

No, animals are not leaving Yellowstone National Park

Online sources are saying that animals are fleeing Yellowstone National Park.  This isn’t the first time such claims have been made. And just like...

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How AI helps to solve a big problem with small earthquakes

How AI helps to solve a big problem with small earthquakes

Calculating earthquake magnitudes can be a challenge in places like Yellowstone, where lots of small seismic events can occur in rapid succession. But...

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Another new hole in the ground at Norris Geyser Basin

Another new hole in the ground at Norris Geyser Basin

In April 2025, Yellowstone National Park geologists identified a new thermal feature in Norris Geyser Basin. Investigation of multiple data streams...

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Eruption Unknown: The case of the newly recognized geologic unit

Eruption Unknown: The case of the newly recognized geologic unit

In geology, even small layers can tell big stories.  But figuring out the origins of such small layers can be a challenge, requiring careful mapping...

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In Yellowstone, even animals sometimes make mistakes

In Yellowstone, even animals sometimes make mistakes

The recent death of a bison at Grand Prismatic Spring is an emphatic example of the danger posed by thermal areas in Yellowstone National Park.  But...

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Remembering the Gros Ventre Slide of 1925

Remembering the Gros Ventre Slide of 1925

One hundred years ago, on June 23, 1925, a mountainside in the Gros Ventre Range in northwest Wyoming collapsed, unleashing one of the largest...

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