Historical tsunamis · 684
684 Nankaido tsunami
Japan
The tsunami of 684 originated near Nankaido (Japan).
Key facts
- Date
- 684
- Cause
- Earthquake
- Magnitude
- M8.4
- Maximum documented water height
- 3.00 m
- Deaths
- many (about 101–1,000)
- Damage
- severe (about US$ 5–25 million)
- Observation records
- 2
- Countries affected
- 1
It was triggered by a magnitude 8.4 earthquake.
The highest documented water height was 3.00 m (Atashika, Japan).
2 observation sites in 1 countries are recorded.
The database records many (about 101–1,000) deaths.
Damage is estimated at severe (about US$ 5–25 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 | 3.00 m Atashika | — | — |
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 |
|---|---|---|---|
| Atashika · Mie | 3.00 m | 255 km | Japan |
| Tosa · Kochi | — | 124 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.