News

This week, a group of volcanic gas scientists from across the United States, including staff from the USGS Hawaiian Volcano Observatory (HVO), will...

Twenty-five middle school-age GeoGirls spent five days conducting hands-on research and interacting with female scientists, educators and older...

Halema‘uma‘u water pond on September 10

Animated, comparison, and video imagery of the Halema‘uma‘u water pond.

Geoscientists have never observed an active magma reservoir firsthand because magmas are stored inaccessibly deep underground. However, crystals are...

An early morning view looking north across Moku‘āweoweo, Mauna Loa's summit caldera, from a spot near the summit cabin on the volcano's south caldera...

"Volcano Watch," weekly articles written primarily by U.S. Geological Survey Hawaiian Volcano Observatory (HVO) staff and occasionally by USGS...

Halema‘uma‘u water pond

Yellowstone National park hosts more than 10,000 hydrothermal features including hot springs, geysers, fumaroles, and mud pots. But did you know that...

Continued slow rise of water level at bottom of Halema‘uma‘u