fumarolic activity

Fumarolic activity refers to the emission of gases, such as steam, carbon dioxide, and sulfur compounds, from vents or openings called fumaroles on a volcano. This activity occurs when groundwater or surface water gets heated by the magma beneath the Earth's surface, producing hot gases that escape through fissures. Fumaroles are signals of ongoing volcanic processes and can provide clues about the state of a volcano’s activity. While they often don't produce lava or ash, their gases can affect local air quality and help scientists monitor volcanic behavior.