Historical tsunamis · Dec 12, 2025, 2:44 AM UTC
2025 Off Northeast Coast Honshu tsunami
Japan
The tsunami of Dec 12, 2025, 2:44 AM UTC originated near Off Northeast Coast Honshu (Japan).
Key facts
- Date
- Dec 12, 2025, 2:44 AM UTC
- Cause
- Earthquake
- Magnitude
- M6.7
- Depth
- 10 km
- Maximum documented water height
- 0.20 m
- Observation records
- 3
- Countries affected
- 1
It was triggered by a magnitude 6.7 earthquake at a depth of 10 km.
The highest documented water height was 0.20 m (Hachinohe, Japan).
3 observation sites in 1 countries are recorded.
Map of observation sites
3Each dot is a documented observation site; colour and size show the observed water height. The triangle marks the source.
Tsunami arrival times
Documented arrival times from the NOAA/NCEI database, showing the earliest recorded location per country. Coverage is incomplete: a country without an entry was not necessarily spared.
- 0:00 hEarthquake (origin) · Dec 12, 2025, 2:44 AM UTC
- 0:31 hJapan · Mutsuogawara
3 places with a documented arrival time
Observations by country
| Country | Observation records | Maximum documented water height | Deaths | Earliest arrival |
|---|---|---|---|---|
| Japan | 3 | 0.20 m Hachinohe | — | 0:31 h |
Highest documented water heights
3 / 3Individual 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 |
|---|---|---|---|
| Hachinohe · Aomori | 0.20 m | 111 km | Japan |
| Shoyagyoko · Hokkaido | 0.20 m | 132 km | Japan |
| Mutsuogawara · Aomori | — | 113 km | Japan |
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.