Most of New Zealand’s hydrothermal activity – hot water below the Earth’s crust – happens in the Taupo volcanic zone, from White Island to Mt Ruapehu.
This puts homes and land in those areas at risk from hydrothermal eruptions, ground subsidence and gas emissions.
If you see signs of hydrothermal activity, contact your local council.
Warning signs include:
- patches of dying grass
- unusually warm or cracked hard surfaces, such as paths and driveways
- holes or steam from the ground
- hot surface water or groundwater.
- Ask your local council for information about the likelihood of hydrothermal activity in your area.