Caldera Chronicles

The interactive Geology of Yellowstone Map has been updated with new data. Check out recently added map layers that highlight Yellowstone’s monitoring...

The Yellowstone hotspot—the source of heat that powers Yellowstone’s vast volcanic system—has long been thought to have initiated about 17 million...

Results from laboratory experiments have provided significant insights on many fundamental physical and chemical processes on Earth. They also add...

Yellowstone hosts thousands of thermal features which have diverse chemistries and origins. The most iconic features, like Old Faithful, have neutral...

The tallest active geyser in the world has been erupting at a record pace since March 2018. Why are eruptions so energetic, what influences the...

Although 2020 may not have been a great year for many of us, it was a pretty interesting year in Yellowstone.  With this first Yellowstone Caldera...

Although Yellowstone Lake itself may seem calm, the floor of the lake is littered with hydrothermal explosion craters.  Detailed studies are beginning...

Geology is inherently a three-dimensional science—it’s not just about what is at the surface, but what is beneath the surface as well. This is...

Yellowstone National Park is known for its unique hydrothermal features and array of animals and plants, but what about its fossils? From tiny...

Have you noticed that there has been an increase in the number of earthquakes happening in Yellowstone over the last week?  This is because there is...

The Blackfoot Volcanic Field in southeast Idaho is a unique product of Yellowstone hotspot volcanism. While it is chemically similar to other volcanic...

We know from decades of observation that Yellowstone’s geyser basins are always changing, but what about thermal activity beneath the waters of...

Earthquake magnitudes may seem straightforward, but a lot goes into their calculation, and multiple methods can be used.  These methods must account...

Of the three enormous explosive eruptions from Yellowstone in the past 2.1 million years, the earliest and largest was the one that gave rise to the...

If you’ve been to Yellowstone, you’ve no doubt smelled some of the gases that come from depth and escape to the surface.  In addition to their noses...

A swimming pool?  At Old Faithful?  Sounds crazy, but for nearly 40 years in the first half of the 20th century there was a geyser-heated bathhouse...

Yellowstone has a lot to offer visitors, from its world-famous hydrothermal features to its vast array of wildlife and breath-taking scenery...

Old Faithful Geyser got its unique name in the 19th century because its eruptions were so regular and predictable. But during parts of the 13th and...

Fall is a time for maintaining monitoring sites in Yellowstone, since they will not be accessible during the winter months.  That includes the...

Some of the most valuable data used to understand the evolution of the Yellowstone volcano come from the microscopic world. What are some of the tools...