Historical tsunamis · March 1846
1846 Sanriku tsunami
Japan
The tsunami of March 1846 originated near Sanriku (Japan).
Key facts
- Date
- March 1846
- Cause
- Earthquake
- Magnitude
- M6.9
- Maximum documented water height
- 2.00 m
- Observation records
- 2
- Countries affected
- 1
It was triggered by a magnitude 6.9 earthquake.
The highest documented water height was 2.00 m (Rikuchu, Japan).
2 observation sites in 1 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 |
|---|---|---|---|---|
| Japan | 2 | 2.00 m Rikuchu | — | — |
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 |
|---|---|---|---|
| Rikuchu · Iwate | 2.00 m | 48 km | Japan |
| Kuwagasaki · Iwate | 1.80 m | 49 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.