Geology

At Yellowstone’s Edge: The Beartooth Mountains And The Stillwater Complex

Yellowstone volcanism has produced some of the youngest rocks in North America. This same region also features some of the most ancient rocks in North America—as old as 3.96 billion years in the Beartooth Mountains to the northeast of Yellowstone caldera.

Read more about At Yellowstone’s Edge: The Beartooth Mountains And The Stillwater Complex

By Kurt Repanshek - April 8th, 2025 2:30am

Kīlauea's Continuing Summit Eruption At Hawai'i Volcanoes National Park

The episodic summit eruption of Kīlauea in Halemaʻumaʻu crater has been going on for over three months now, with 16 eruptive episodes displaying lava fountains and lava flows within Kaluapele (the summit caldera).

Read more about Kīlauea's Continuing Summit Eruption At Hawai'i Volcanoes National Park

By Kurt Repanshek - April 6th, 2025 3:00am

Spectacular Waterfalls Are An Often-Hidden Gem Of Yellowstone National Park

Yellowstone National Park is famous for its volcanic landscapes, erupting geysers, colorful hot springs, and abundant and diverse wildlife. The park is also unique because of the many waterfalls along its rivers and creeks that mostly form in deep gorges, where rocks with differences in hardness meet or at the edges of thick rhyolite lava flows.

Read more about Spectacular Waterfalls Are An Often-Hidden Gem Of Yellowstone National Park

By Kurt Repanshek - April 1st, 2025 2:30am

What Do Volcanologists Learn From Ashfall Maps?

How do volcanologists determine the height of eruptive plumes from Yellowstone’s past explosive eruptions? Ironically, you have to dig into the ground to get the answer.

Read more about What Do Volcanologists Learn From Ashfall Maps?

By Kurt Repanshek - March 25th, 2025 2:30am

Yellowstone: Where There’s Always Something New!

Geologically speaking, things are always changing at Yellowstone—especially in the hydrothermal areas. It’s simply the nature of the complex hydrothermal system that overlies one of the planet’s largest magma reservoirs.

Read more about Yellowstone: Where There’s Always Something New!

By Kurt Repanshek - March 18th, 2025 2:30am

Slow As A Sloth Or Swift As A Sprinter? Clocking The Speed Of Yellowstone’s Magma

To time how fast a sprinter runs, you just need a stopwatch. To time how fast magma moves, you need to know a little bit about chemistry.

Read more about Slow As A Sloth Or Swift As A Sprinter? Clocking The Speed Of Yellowstone’s Magma

By Kurt Repanshek - March 12th, 2025 2:30am

Kīlauea Continues To Put On A Dazzling Show At Hawai'i Volcanoes National Park

The Kīlauea volcano at Hawai'i Volcanoes National Park continues to put on a dazzing show, with fountains of lava being spit 400-500 feet into the air.

Read more about Kīlauea Continues To Put On A Dazzling Show At Hawai'i Volcanoes National Park

By Kurt Repanshek - March 11th, 2025 2:53pm

Volcano Watch | Fountains Of Lava At Hawai'i Volcanoes National Park

Kīlauea volcano at Hawai'i Volcanoes National Park is in a unique phase of activity in Halemaʻumaʻu, with 12 episodes of dual lava fountains since December 23, 2024.

Read more about Volcano Watch | Fountains Of Lava At Hawai'i Volcanoes National Park

By Kurt Repanshek - March 8th, 2025 2:30am

Yellowstone And Hawaiʻi—How Similar Are They?

The US hosts two of the world’s most famous volcanic systems: Yellowstone and Hawaiʻi. These systems a well known for producing large volumes of magma through time and leaving chains of volcanic features in their wake, although they do so in very different ways.

Read more about Yellowstone And Hawaiʻi—How Similar Are They?

By Kurt Repanshek - February 26th, 2025 2:02am

Observing Non-Earthquake Signals On The Yellowstone Seismic Network

The Yellowstone Seismic Network is designed to record ground shaking due to earthquakes. But earthquakes aren’t the only things that rattle the ground in Yellowstone!

Read more about Observing Non-Earthquake Signals On The Yellowstone Seismic Network

By Kurt Repanshek - February 19th, 2025 2:30am

INN Member

The easiest way to explore RV-friendly National Park campgrounds.

The Essential RVing Guide to the National Parks

Here’s the definitive guide to National Park System campgrounds where RVers can park their rigs.

Our app is packed with RVing- specific details on more than 250 campgrounds in more than 70 national parks.

You’ll also find stories about RVing in the parks, tips helpful if you’ve just recently become an RVer, and useful planning suggestions.

The Essential RVing Guide to the National Parks