On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Ash cloud over New Zealand nearly two hours after Mt Tongariro erupts

Ash cloud over New Zealand at 1:45 am, on 7 August, nearly two hours after Mt Tongariro erupts. The colour-scale (predominantly grey-scale) is temperature. Credit: NOAA 18 satellite and NIWA.