The images below represent a snapshot of the latest tsunami gauge recordings for operational instruments in the New Zealand region.
- The most obvious feature of actual sea level recordings is the natural daily tidal variation, about 12 hours between each high or low tide
- Sheltered harbour installations such as Tauranga and Wellington show very little "grey" variation.
- De-tided readings are only available for sites where the tidal model has been computed. An initial model requires several months of data to be collected first.