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  • This dataset defines the maximum expected tsunami height (maximum amplitude) for return periods of 100, 500 and 2500 years at the 50th and 84th percentile of confidence, as estimated by the model described in Power (2013). The dataset also defines the coastal sections that were used for this modelling. The maximum expected tsunami heights are presented for each of these coastal sections. Please note that the maximum expected tsunami height will typically only occur at one location within each coastal section. It is a conservative (pessimistic) assumption if this height is used throughout the section. DOI: https://doi.org/10.21420/2Y8C-2D58 Cite data as: GNS Science. (2013). National Tsunami Hazard Model - 2013. GNS Science. https://doi.org/10.21420/2Y8C-2D58 Cite report as: Power, W.L. (compiler). 2013. Review of Tsunami Hazard in New Zealand (2013 Update), GNS Science Consultancy Report 2013/131. 222 p. A database for the 2021 version of the NTHM is under development.

  • This dataset defines the maximum tsunami height (maximum amplitude) expected to be exceeded once every 100, 500, 1000 and 2500 years on average at the 50th and 84th percentile of confidence, as estimated by the model described in Power et al. (2022). The dataset also defines the coastal sections that were used for this modelling. The expected maximum tsunami heights are presented for each of these coastal sections. Please note that the expected maximum tsunami height will typically only occur at one location within each coastal section. It is a conservative (pessimistic) assumption if this height is used throughout the section. DOI: https://doi.org/10.21420/C3CK-FB93 Cite data as: GNS Science. (2022). National Tsunami Hazard Model (NTHM) 2021 [Data set]. GNS Science. https://doi.org/10.21420/C3CK-FB93 Cite report as: Power, W.L.; Burbidge, D.R.; Gusman, A.R. 2022 The 2021 update to New Zealand's National Tsunami Hazard Model. Lower Hutt, N.Z.: GNS Science. GNS Science report 2022/06. 63 p.; doi: 10.21420/X2XQ-HT52

  • This dataset contains polygons showing the extent of swath (multibeam) bathymetry data in the SW Pacific. The dataset contains metadata for each survey, but not the actual swath bathymetry data. Data supplied by GNS Science, NIWA and LINZ, and sourced from international data repositories.