Historical tsunamis · Mar 30, 2025, 12:18 PM UTC
2025 Tonga tsunami
Tonga
The tsunami of Mar 30, 2025, 12:18 PM UTC originated near Tonga (Tonga).
Key facts
- Date
- Mar 30, 2025, 12:18 PM UTC
- Cause
- Earthquake
- Magnitude
- M7.0
- Depth
- 29 km
- Maximum documented water height
- 0.05 m
- Observation records
- 2
- Countries affected
- 2
It was triggered by a magnitude 7.0 earthquake at a depth of 29 km.
The highest documented water height was 0.05 m (Niue, Niue).
2 observation sites in 2 countries are recorded.
Map of observation sites
2Each dot is a documented observation site; colour and size show the observed water height. The triangle marks the source.
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
 Niue | 1 | 0.05 m Niue | — | — |
| Tonga | 1 | 0.01 m Nukualofa (Nuku'alofa) Vuna Wharf | — | — |
Highest documented water heights
2 / 2Individual documented observations for this event. Heights come from different measurement types and sources; not every location has a measured height.
| Location / station | Observed height | Distance from source | Country |
|---|---|---|---|
| Niue | 0.05 m | 441 km | Niue |
| Nukualofa (Nuku'alofa) Vuna Wharf | 0.01 m | 161 km | Tonga |
More tsunamis
Source: NOAA National Centers for Environmental Information (NCEI), Global Historical Tsunami Database. Confirmed events only. Deaths and damage are database estimates; older records are incomplete. Water heights come from different types of observation.