Hawaiian Volcano Observatory


HVO monitors the active volcanoes in Hawaii, assesses their hazards, issues warnings, and advances scientific understanding to reduce impacts of volcanic eruptions. 

Recent Kīlauea Eruption Information


Date published: September 16, 2021

Volcano Watch — How does HVO determine which regions are most threatened by lava flows?

Most residents of the Island of Hawaiʻi live on one of four potentially active volcanoes and probably have wondered about the threat of lava flows at one time or another. Interestingly, determining future threats relies on knowledge of the past. The long-term likelihood of an area being invaded by lava in the future, is estimated in two different ways based on the history of lava flow activity...

Date published: September 9, 2021

Volcano Watch — The MILEAGE project - Mapping Kīlauea’s Gas Emissions

Large quantities of volcanic gases, such as carbon dioxide (CO2), sulfur dioxide (SO2), and hydrogen sulfide (H2S), are released into the atmosphere during volcanic eruptions. But even between eruptions, smaller amounts of the same gases continue to escape and can provide important clues about the current state of the volcano and the underlying magma.

Date published: September 7, 2021

Photo and Video Chronology – Kīlauea – September 7, 2021

HVO field crews—equipped with specialized safety gear—conduct station maintenance, collect water samples, and monitor for new changes from within the closed area of Hawai‘i Volcanoes National Park with NPS permission.

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