News

GPS station on Mauna Loa.

On March 26, 2019, in response to reduced activity on the volcano, HVO lowered the Volcano Alert Level for Kīlauea's ground-based hazards from...

Kīlauea's Southwest Rift Zone was more volcanically active in the late 18th- to early 19th-centurys than previously assumed.

The 2018 Kīlauea Volcano lower East Rift Zone eruption was the first time Unmanned Aircraft Systems (UAS) were used by the Federal Government to...

In February 1924, the surface of the lava lake at Halema‘uma‘u dropped rapidly and disappeared from view. Throughout March and April, the crater floor...

Rockfalls continue to change the shape of Pu‘u ‘Ō‘ō crater

Early Wednesday morning, just before 1AM on March 13, houses in east Hawai`i began to shake. Without a doubt, it was an earthquake. To those who...

Sulfur deposits forming in the new Halema‘uma‘u crater

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-5.5 earthquake located beneath Kīlauea Volcano's south flank on...

Eruption rate (how much lava comes out of the ground per unit time) is probably the best measure of volcanic activity, and the first step in that...