News

Over the last two centuries, six lava flows erupted from Mauna Loa's Northeast Rift Zone and advanced toward Hilo.

Continued slow rise of water level at bottom of Halema‘uma‘u

Monitoring gases and investigating thermal areas.

A dusting of snow on Mauna Loa summit

The carbon dioxide (CO2) emitted from the Yellowstone magmatic-hydrothermal system has a number of characteristics that make it an important gas to...

In the tradition of Hawaiian Volcano Observatory (HVO) founder Thomas Jaggar's innovative field methods, HVO recently used a cutting-edge technique to...

Yellowstone, like many regions with hydrothermal activity, often exhibits earthquake swarms. But how do we define an earthquake swarm and distinguish...

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.9 earthquake on Monday, November 11, just before 6:36 a.m. HST...

Information about air quality is important to Hawaii residents, particularly those living on the Island of Hawai‘i, where volcanic activity can lead...

More videos of the October 26 water sampling mission