The Hawaiian Volcano
Observatory (HVO) is a volcano observatory located at Uwekahuna Bluff on the rim of Kīlauea
Caldera on the Island of Hawai'i. The observatory monitors four active Hawaiian volcanoes: Kīlauea, Mauna Loa
, 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.
The observatory has a worldwide reputation as a leader in the study of active volcanism. Due to the relatively non-explosive nature of Hawaiian volcanic eruptions, scientists can study on-going eruptions in proximity without being in extreme danger. Located at the main site is the public Thomas A. Jaggar Museum.
This Observatory has Modern electronic equipment now monitors earthquakes from several sites. This information is provided immediately over the Internet, as well as live cameras covering the eruptions. Another important function of HVO is to monitor the sulphur emissions that produce the condition known as vog. The observatory advises the park service when to close areas due to dangerous hazards.