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On April 27, HVO field engineers and a gas geochemist conducted fieldwork to increase HVO's volcano-monitoring capabilities. Staff installed a MultiGAS station to collect volcanic gas data from within Moku‘āweoweo, Mauna Loa's summit caldera. The work was carried out with permission of Hawai‘i Volcanoes National Park. In this photo, an HVO field engineer guides the helicopter as it lowers part of the station down onto the floor of the caldera. Mauna Loa Volcano is currently at Alert Level/Aviation Color Code ADVISORY/YELLOW, due to increased seismicity and summit inflation above background levels. USGS photo by T. Elias.
An HVO gas geochemist works to install a MultiGAS instrument within Mauna Loa summit caldera. The MultiGAS measures real-time volcanic gas (carbon dioxide, water, sulfur dioxide and hydrogen sulfide) concentrations from a fumarole (gas vent) on the floor of the caldera. Ratios of concentrations of gases can give information about the depth and degassing history of magma within the volcano. The MultiGAS also measures fumarole temperature and meteorological parameters such as wind speed and direction, temperature and humidity, and atmospheric pressure. USGS photo by F. Younger.
An HVO field engineer secures the new Mauna Loa summit MultiGAS station on April 27. The Mauna Loa summit MultiGAS was carefully assembled and tested in the lab prior to being deployed on April 27. Components are housed in a weather-proof case to protect the instrument from extreme conditions at Mauna Loa summit. The station includes a power package of solar panels and batteries and an antenna that transmits data to HVO around the clock. USGS photo by T. Elias.
HVO staff work together while maintaining social distancing as they install different parts of the new Mauna Loa summit MultiGAS station on April 27. In the left side of the image, an HVO field engineer connects solar panels to the batteries that will power the MultiGAS station. In the right side of the image, an HVO gas geochemist assembles components of the MultiGAS instrument, which is connected to the power unit on the left via weather-proof wiring. USGS photo by F. Younger.
HVO's new Mauna Loa summit MultiGAS station after installation on April 27. The station is next to a gas-emitting vent or fumarole, within Moku‘āweoweo—Mauna Loa's summit caldera. The site is an important addition to HVO's volcano-monitoring network and could provide HVO with early signs of increased unrest. Mauna Loa is not currently erupting, though it is at an elevated Alert Level/Aviation Color Code (ADVISORY/YELLOW) due to seismicity and ground deformation being above background levels. USGS photo by T. Elias.
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