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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...

Several small collapses as summit lava lake slowly drops

October 15, 2015, is the 3rd annual Great Hawaii ShakeOut. That day also marks the 9th anniversary of Hawaii's two most recent damaging earthquakes.

Fumaroles are openings in the earth’s surface that emit steam and volcanic gases, such as sulfur dioxide and carbon dioxide. They can occur as holes...

The State of Hawaii has a long history of destructive earthquakes. More than 30 magnitude-6.0 or greater earthquakes have impacted the islands since...

Scattered breakouts remain active northeast of Pu‘u ‘Ō‘ō

Bottled soda, when opened suddenly after shaking, is commonly used as an analogy for volcanic eruptions. Perhaps the first use of this analogy for...

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...

The USGS Hawaiian Volcano Observatory (HVO) changed the Volcano Alert Level and Aviation Color Code for Mauna Loa Volcano from NORMAL/GREEN to...