Historical tsunamis · Feb 8, 1793, 3:00 AM UTC
1793 W. Off Aomori tsunami
Japan
The tsunami of Feb 8, 1793, 3:00 AM UTC originated near W. Off Aomori (Japan).
Key facts
- Date
- Feb 8, 1793, 3:00 AM UTC
- Cause
- Earthquake
- Magnitude
- M6.9
- Maximum documented water height
- 1.80 m
- Deaths
- 12
- Houses destroyed
- 164
- Damage
- moderate (about US$ 1–5 million)
- Observation records
- 2
- Countries affected
- 1
It was triggered by a magnitude 6.9 earthquake.
The highest documented water height was 1.80 m.
2 observation sites in 1 countries are recorded.
The database records 12 deaths.
Houses destroyed: 164.
Damage is estimated at moderate (about US$ 1–5 million).
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 | — | — | — |
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 |
|---|---|---|---|
| Ajigasawa · Aomori | — | 23 km | Japan |
| Nanatsuishi (Ajigasawa) · Aomori | — | 23 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.