News

HVO rebuilds and relocates Mauna Loa gas monitoring instruments

An early morning view looking north across Moku‘āweoweo, Mauna Loa's summit caldera, from a spot near the summit cabin on the volcano's south caldera...

In ongoing media coverage of demonstrations at the base of Mauna Kea, many hundreds of people can be seen standing on a black lava flow that surrounds...

Video shows Moku‘āweoweo, the caldera at the summit of Mauna Loa, during a routine overflight. 

On July 2, HVO raised the Volcano Alert Level for Mauna Loa from "Normal" to "Advisory".

Shortly before midnight on July 5, 1975, Mauna Loa Volcano awakened with a shudder. Quickly responding to a seismic earthquake/tremor alarm at 11:18 p...

This timelapse sequence of webcam images over a 24-hour period shows a typical day at the summit of Mauna Loa. 

Routine visit to Mauna Loa summit.

HVO scientists inspect monitoring instruments on Mauna Loa. 

Geologic map of the central-southeast flank of Mauna Loa volcano, Island of Hawaiʻi, Hawaiʻi: USGS Scientific Investigations Map 2932–B