An HVO gas geochemist works to install a MultiGAS instrument within Mauna Loa su
Detailed Description
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.
Sources/Usage
Public Domain.