Volcano Watch

When Mauna Loa erupted in November 2022 for the first time in nearly forty years, one of the main concerns was the lava and where it would flow. But...

This new year is the final year of Kīlauea volcano projects funded by the Additional Supplemental Appropriations for Disaster Relief Act of 2019 (H.R...

Measurements of gravity can be used to determine how mass is distributed beneath a volcano. Microgravity surveys can measure changes in the subsurface...

Newberry Volcano is one of the largest and most hazardous active volcanoes in the United States. It is designated a “very high threat” volcano in a...

Pāhala, a town located in the southeast part of the Island of Hawai‘i, lies above the state’s most seismically active area. In the last 5 years, the...

Real-time views of an eruption site are a vital source of information for emergency managers, so webcams are one of the most important tools in an...

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...

The ongoing summit eruption at Kīlauea volcano turned 1 year old on September 29, 2022. The past year’s activity has commonly been described as...

Feeling occasional earthquakes is part of the experience of living in the State of Hawaii, especially on the Island of Hawai‘i.  The vast majority of...

The last eruption of Mauna Loa occurred in 1984 and began in a style typical of the volcano. At 10:55 p.m. on March 24, 1984, the rate of earthquakes...

Crater filling at Kīlauea is sometimes like pouring liquid into a mug, but more often it is like injecting haupia crème into a crispy malasada.