Historical tsunamis · Dec 30, 1703, 5:00 PM UTC
1703 Off SW Boso Peninsula tsunami
Japan
The tsunami of Dec 30, 1703, 5:00 PM UTC originated near Off SW Boso Peninsula (Japan).
Key facts
- Date
- Dec 30, 1703, 5:00 PM UTC
- Cause
- Earthquake
- Magnitude
- M8.2
- Maximum documented water height
- 11.7 m
- Deaths
- 5,233
- Houses destroyed
- 20,162
- Damage
- extreme (over US$ 25 million)
- Observation records
- 46
- Countries affected
- 1
It was triggered by a magnitude 8.2 earthquake.
The highest documented water height was 11.7 m (Kobatakeike, Japan).
46 observation sites in 1 countries are recorded.
The database records 5,233 deaths.
Houses destroyed: 20,162.
Damage is estimated at extreme (over US$ 25 million).
Map of observation sites
46Each 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 | 46 | 11.7 m Kobatakeike | 1,497 | — |
Highest documented water heights
15 / 46Individual 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 |
|---|---|---|---|
| Kobatakeike · Chiba | 11.70 m | 148 km | Japan |
| Tokawa · Chiba | 10.80 m | 146 km | Japan |
| Wada · Chiba | 10.50 m | 95 km | Japan |
| Ainohama · Chiba | 10.00 m | 24 km | Japan |
| Habuminato, Oshima Island · Izu-Oshima, Tokyo | 10.00 m | 34 km | Japan |
| Okada, Oshima Island · Izu-Oshima, Tokyo | 10.00 m | 39 km | Japan |
| Chikuma · Shizuoka | 8.80 m | 94 km | Japan |
| Onjuku · Chiba | 8.00 m | 74 km | Japan |
| Tokyo Bay · Tokyo | 8.00 m | 105 km | Japan |
| Nagasaki · Chiba | 7.70 m | 147 km | Japan |
| Katsuura (Katsuurashi) · Chiba | 7.40 m | 69 km | Japan |
| Iwai · Ibaraki | 7.30 m | 195 km | Japan |
| Niemonjima · Chiba | 7.00 m | 50 km | Japan |
| Hota · Chiba | 6.50 m | 48 km | Japan |
| Kamogawa · Chiba | 6.10 m | 52 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.