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Tonga eruption and tsunami shock the world
The Hunga-Tonga Hunga-Ha'apai (HT-HH) volcano was like a massive shotgun blast from the deep, generating the biggest atmospheric explosion recorded on Earth in more than 100 years. -
RiskScape software
Research ProjectRiskScape is a software application for analysing natural hazard consequences. -
Seabed 2030
Research ProjectNIWA is leading a New Zealand partnership to map the South and West Pacific Ocean's seabed as part of a worldwide initiative to map the entire globe’s seafloor. -
Comprehensive eruption study highlights need for further work
Media release01 December 2023A new study has comprehensively mapped the immediate after effects of the January 2022 eruption of Hunga Tonga - Hunga Ha’apai, highlighting the risks of similar events. -
Tonga eruption caused fastest ever underwater flow
Media release07 September 2023The 2022 Tonga volcanic eruption triggered the fastest underwater flow ever recorded. -
Kaikōura’s deep seabed is rapidly recovering, says NIWA
Media release19 June 2023Areas of Kaikōura’s seabed show promising signs of recovery just four years after the 2016 earthquake, says NIWA. -
Making big waves in the Pacific
Feature story15 December 2022Prior to 15 January, Hunga Tonga-Hunga Ha'apai was a little-known undersea South Pacific volcano with a long name. Within 24 hours, it was a global phenomenon – the site of the largest atmospheric explosion in almost 150 years. Jessica Rowley looks at why a remote Tongan volcano took the world by storm. -
Tonga eruption confirmed as largest ever recorded
Media release21 November 2022A New Zealand-led team has completed the fullest investigation to date into January’s eruption of the underwater Tongan volcano. -
High UV prompts SunSmart warnings
Media release21 October 2022Experts are warning Kiwis to be extra cautious this summer, with ultraviolet (UV) radiation levels averaging higher compared to 2021. -
2020 Australian wildfires reveal significant hole in our understanding of ozone
Media release09 August 2022Smoke from the devastating Australian wildfires impacted the atmosphere in a way that’s never been seen before. -
Seen a stunning sunrise or sunset lately? The Tongan volcano may be the cause
Media release15 June 2022The Tongan volcanic eruption may be responsible for New Zealand’s unusually vibrant sunrises and sunsets, say NIWA scientists. -
Tracking an eruption
Feature story30 May 2022Stacy Mohan looks at how the shockwaves from a remote Tongan island rippled through NIWA’s research community.