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Airborne thermal infrared imaging is an important way to track hydrothermal activity in Yellowstone.  The first such images were acquired in 1961.

Kīlauea is one of the most active volcanoes in the world with eruptions common both at its summit caldera and within its two rift zones. Frequent...

Building roads through Yellowstone is a considerable undertaking given all the thermal ground found throughout the park. Bridges, like the new span...

Between Norris Geyser Basin and Mammoth Hot Springs is an interesting thermal area known as Roaring Mountain.  These days, it is quieter than it used...

Since July 2024 activity, at Kīlauea has been punctuated by two periods of intense unrest, centered on the upper East Rift Zone (ERZ). The periods...

Earthquakes that rupture the ground surface leave behind the telltale signature of fault scarps, which provide clues about seismic activity in the...

Photography has been a crucial part of volcano monitoring in Hawaii going back to the start of the USGS Hawaiian Volcano Observatory (HVO). In 1911...

What did the Yellowstone landscape look like after one of its large caldera-forming eruptions? Clues from crystals suggest it might have resembled...

Last month, the Hawaiʻi County Civil Defense Agency, Hawaiʻi Volcanoes National Park, and the U.S. Geological Survey (USGS) Hawaiian Volcano...

Hydrothermal explosions, like that which occurred on July 23, 2024, in Biscuit Basin, are not just a hazard that occurs in Yellowstone.