Hawaiian Volcano Observatory

The Hawaiian Volcano Observatory is an agency of the U.S. Geological Survey, with temporary offices located in Hilo on the Island of Hawaiʻi. The former volcano observatory clifftop facility and HVO offices, closed due to structural damage in 2018, is located at Uwekahuna Bluff on the rim of Kīlauea Caldera. The observatory staff and equipment monitors four active Hawaiian volcanoes: Kīlauea, Mauna Loa, Hualālai, and Haleakalā. Because Kīlauea and Mauna Loa are significantly more active than Hualālai and Haleakalā, much of the observatory's research is concentrated on the former two mountains.

HVO has a worldwide reputation as a leader in the study of active volcanism. Due to the relatively non-explosive nature of Kīlauea's volcanic eruptions for many years, scientists could study ongoing eruptions in proximity without being in extreme danger. Also located at the shuttered main site was the public Thomas A. Jaggar Museum.

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