News

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-4.3 earthquake located beneath Mauna Loa's south flank on...

A swarm of earthquakes, that began on March 29, 2021, at 2:30 a.m. HST is occurring beneath the northwest flank of Mauna Loa. Mauna Loa is not...

A new project at the USGS Hawaiian Volcano Observatory (HVO) is once again making use of old aerial photographs and field notes that were used to make...

Mauna Loa Volcano is not erupting. A small swarm of shallow seismicity, that began at 1:00 a.m. HST this morning, is occurring beneath the upper Ka...

Mauna Loa has been in the news lately, as the volcano continues to awaken from its slumber. While an eruption of Mauna Loa is not imminent, now is the...

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.2 earthquake located beneath Mauna Loa's southeast flank on...

“When will Mauna Loa erupt next?” This was the title of a Volcano Awareness Month video presentation released by the USGS Hawaiian Volcano Observatory...

In this talk, USGS Hawaiian Volcano Observatory geologist Frank Trusdell, who has studied Mauna Loa for two decades, presents a roughly 40-minute talk...