A year ago, the Yellowstone ... it's also a reset for the system that later brings rejuvenation. Fly fishing guide Matt Wilhelm says he's excited to get back out on the river this summer and ...

In order to understand what would happen in the modern day, scientists modeled where ash has been found from previous big eruptions at Yellowstone. You can see those ash beds outlined in the map ...

In the time it would take to map ... system allow discrete, episodic eruptions of hot water at the surface. There are only about 1,000 active geysers on Earth; about half of them are in Yellowstone.

The Madison River from the Wyoming/Montana state line downstream to the park boundary near the West Entrance in West Yellowstone ... in the shallow hydrothermal system beneath Black Diamond ...

An indigenous map drawn on a bison pelt and indicating a volcano on the Yellowstone River was described by the governor of Louisiana Territory in an 1805 letter to Thomas Jefferson. The first ...

Previous studies suggested the top of Yellowstone's magma system could lie anywhere from 3 to 8 kilometers deep -- an uncertainty that left geologists debating how the magma system today compares ...

You can see those ash beds outlined in the map below. The most recent eruption ... Eruptions of the Yellowstone volcanic system have included the two largest volcanic eruptions in North America ...