Historical tsunamis · 426 BC
426 BC Corinthos-Patras Gulf tsunami
Greece
The tsunami of 426 BC originated near Corinthos-Patras Gulf (Greece).
Key facts
- Date
- 426 BC
- Cause
- Earthquake
- Magnitude
- M7.1
- Maximum documented water height
- —
- Deaths
- 2,500
- Houses destroyed
- many (about 101–1,000)
- Damage
- severe (about US$ 5–25 million)
- Observation records
- 11
- Countries affected
- 1
It was triggered by a magnitude 7.1 earthquake.
11 observation sites in 1 countries are recorded.
The database records 2,500 deaths.
Houses destroyed: many (about 101–1,000).
Damage is estimated at severe (about US$ 5–25 million).
Map of observation sites
11Each 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 |
|---|---|---|---|---|
| Greece | 11 | — | — | — |
Highest documented water heights
11 / 11Individual 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 |
|---|---|---|---|
| Atalanti Island | — | 42 km | Greece |
| Ceneum | — | 142 km | Greece |
| Daphnus | — | 22 km | Greece |
| Echinos, Maliakos Gulf | — | 3 km | Greece |
| Lichades Island | — | 14 km | Greece |
| Opous | — | 45 km | Greece |
| Orobies | — | 47 km | Greece |
| Skarphia, Maliakos Gulf | — | 7 km | Greece |
| Skopelos | — | 92 km | Greece |
| Thermoplyles | — | 17 km | Greece |
| Thronium | — | 10 km | Greece |
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.