News

Volcanism in the Yellowstone region has generated a lot of ash over the last several million years.  Rivers, including the ancestral Missouri River...

Yellowstone’s thermal waters are more than just hot—they also contain a variety of elements, some of which are potentially toxic!  Arsenic is an...

Seismic activity in central Idaho has been elevated for the past 20 months. These earthquakes are aftershocks of a M6.5 earthquake that occurred on...

Yellowstone is well-known as one of the largest volcanic systems in the world. Few people know, however, that the largest-known subaerial landslide on...

Many of Yellowstone’s hot springs, geysers, mud pots, and fumaroles look different depending on the season, year, or sometimes even the day one visits...

Measuring the heat output of a hydrothermal area is not easy—Earth’s surface is often too noisy for accurate measurements to be made easily.  But the...

The combination of a continuous MultiGAS station within Mount St. Helens' crater and the new scanning DOAS represents state-of-the-art in geochemical...

Normal faulting? No change in volcanic hazard? Cascades Volcano Observatory geophysicists describe how they interpret earthquake data using the June 5...

Expansion of the lahar detection system at Mount Rainier will improve the Cascades Volcano Observatory's overall volcano monitoring and lahar...

While most of the Cascade Range volcanoes are located in remote areas, volcanic processes like ashfall and lahars can put large populations at risk...