News

On July 4, 2018, an observer at the Volcano House Hotel was watching the evolving collapse of Halema‘uma‘u Crater, 4 km (2.5 miles) away. Suddenly he...

Volcanologists have a variety of ways of measuring present-day gas emissions from volcanoes.  But what about gas emissions that happened in years past...

Field crews set up temporary gas monitoring sensors and sample hot springs and seeps, soils, and areas where sulfur smells were reported. Preliminary...

Rainbow over Halema‘uma‘u and the water lake

The recent first anniversary of the appearance of water at Kīlauea's summit is a reminder of how much has changed since the end of the 2018 eruption...

Hayden Valley is a gorgeous expanse of grassland and meadows located right in the center of Yellowstone National Park.  It is a haven for wildlife and...

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.2 earthquake located on the south part of the Island of Hawai‘i...

Timelapse showing typical activity at Kīlauea's summit water lake

On July 25, 2019, ponded water was first observed within Halema‘uma‘u at the summit of Kīlauea Volcano. Over the past twelve months, the USGS Hawaiian...

Annual GPS survey on Mauna Loa