Volcano Watch

What is a volcanologist, exactly? The short answer is a volcanologist is a person who studies volcanoes, but that’s not the whole story. There are as...

Seismology is one of several critical elements used at the Hawaiian Volcano Observatory (HVO) to assess volcanic unrest and hazards. Often, the...

This January, the USGS Hawaiian Volcano Observatory (HVO) will partner with the University of Hawai‘i at Hilo, Hawai‘i Volcanoes National Park Service...

The first few hours of Mauna Loa’s eruption were dynamic, and volcanologists intently watched monitoring data to track changing conditions and...

At 10:45 p.m. Sunday evening, November 27, USGS Hawaiian Volcano Observatory (HVO) scientists were alerted to an earthquake swarm beneath Mauna Loa...

The U.S. Geological Survey (USGS) Hawaiian Volcano Observatory (HVO) sets the Volcano Alert Level and Aviation Color Code for volcanoes in Hawaii and...

Lava flows erupted from the lower East Rift Zone (LERZ) of Kīlauea in 2018 and devastated lower Puna. In 2019, a team of scientists from the USGS, the...

Ta‘ū volcano in American Samoa experienced volcanic unrest in the form of an earthquake swarm that was felt throughout the Manuʻa Islands (Ofu-Olosega...

Satellites have become one of the fundamental tools used to monitor active volcanoes. One of the most revolutionary advances has been the use of InSAR...

After damaging earthquakes, response and recovery takes place under the threat of aftershocks. USGS aftershock forecasts can help you understand what...