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Geologic mapping is considered by some to be "old school" science. By current standards, there's certainly nothing glitzy or high tech about walking...

Panorama of the north rim of Mauna Loa's summit caldera; an HVO geologist checks Mauna Loa monitoring equipment.

Scientists at the U.S. Geological Survey Hawaiian Volcano Observatory have elevated the Volcano Alert Level for Mauna Loa from NORMAL to ADVISORY...

Scientists at the U.S. Geological Survey Hawaiian Volcano Observatory have elevated the Volcano Alert Level for Mauna Loa from NORMAL to ADVISORY.

Mauna Loa earthquake and deformation data between 2010 and September 17, 2015.

Continuous gas-monitoring site in Moku‘āweoweo Caldera, Mauna Loa.

As part of our monitoring of subsurface activity at Mauna Loa, we recently conducted a series of measurements of the force of gravity at various...

USGS Hawaiian Volcano Observatory scientists extract as much insight as possible from historic accounts of eruptions, and then combine that...

The recent high lava lake levels at Kīlauea Volcano have caught the attention of visitors and kama‘aina alike. But we shouldn't forget that unrest at...

Over the past week, lava has risen within the Halema‘uma‘u Overlook crater (active vent at the summit of Kīlauea) and overflowed onto the floor of the...