News

The Hawaiian Volcano Observatory conducted a geology monitoring overflight of Kīlauea summit on July 19, 2022.

What makes a volcano a volcano? This was the topic of a “Volcano Watch” article about 20 years ago. Recent questions from visitors suggest this...

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.5 earthquake located beneath Mauna Kea's northwest flank on...

The original purpose of geologic mapping in Hawaiʻi was to understand the distribution of groundwater and soils to support agriculture. But as...

The third in a series of recorded talks by HVO staff that will be posted on our website throughout the month of January. These talks are presented as...

Gravimeters, essentially extremely precise pendulums, can measure a change in the force of gravity to one-in-one billionth of the force you feel every...

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.4 earthquake located beneath Mauna Kea's northwest flank on...

Mauna Kea volcano hasn't erupted in over 4,500 years, but that doesn't mean it's quiet. In fact, for decades it has been hiding one of the most unique...

Many messages to AskHVO (askHVO@usgs.gov) request resources relating to geologic maps and geographic information systems (GIS) data. "Is there a map...

In the past, HVO would occasionally post images of people collecting lava samples on our website. These photos usually featured a person (with little...