MultiGas system advances GeoNet’s automatic monitoring of our active volcanoes


09 May 2024

Monitoring station installed at Ngauruhoe Outer Rim fumarole

In March, GeoNet took a major step towards automating the monitoring of our active volcanoes by establishing MultiGas systems to collect data at Ngauruhoe and Te Maari Crater, in the Tongariro National Park.

Carbon dioxide (CO₂), sulphur dioxide (SO₂), and hydrogen sulphide (H₂S) gases are emitted through gas venting fumaroles on many active volcanoes and provide critical information for our volcano monitoring team. Building our understanding of the gas emissions helps to detect and confirm eruptions and improves forecasting changes in activity. MultiGas systems automatically measure the concentrations of these gases around the clock.

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