1. The University of Auckland School of Environment, , Auckland 1010, New Zealand
2. GNS Science, Wairakei Research Centre, Taupō 3377, New Zealand
3. University of Canterbury School of Earth and Environment, , Christchurch 8041, New Zealand
4. Victoria University of Wellington School of Geography, Environment and Earth Sciences, , Wellington 6012, New Zealand
5. Vanuatu Meteorology and Geohazards Department , Port Vila, Vanuatu