Hawaiian Volcano Observatory

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


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Date published: January 14, 2020

HVO's first report in 1911—all about the Halema‘uma‘u Crater lava lake

HVO's first volcanic activity update, written by Frank Perret, the most famous American volcanologist of his time, appeared in the Pacific Commercial Advertiser (now the Honolulu Star-Advertiser) on August 15, 1911.

Date published: September 25, 2019

Volcano Watch - Scientific community lends a hand to measure Kīlauea's changing shape

The USGS Hawaiian Volcano Observatory (HVO) has an extensive network of instruments that helps us monitor how the ground deforms due to magma moving underground. However, we are fortunate that scientific colleagues also pitched in to support our responses to Kīlauea Volcano's lower East Rift Zone (LERZ) eruption and summit collapse.

Date published: September 25, 2019

Volcano Watch - Kīlauea hazard assessments include analyses of salts on volcanic ash

Sulfur dioxide (SO2)-rich emissions have long been a feature of Kīlauea Volcano's summit activity. However, vigorous volcanic ash production during the 2018 eruption raised new concerns about potential impacts for downwind communities.

Mauna Loa
YELLOW ADVISORY, 2020-01-16 19:56:12 UTC
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