2.4 mHighest wave
Tsunami of 31 March 1761: off Portugal
A tsunami started off the coast of Portugal on 31 March 1761; cause: earthquake. The highest wave reached 2.4 m. It is recorded at 22 places in 6 countries.
31 March 176112:01 UTC
earthquakeCause · M8.5
–Deaths
22Places the wave reached · probable
Where it started and where the wave arrived
< 0,5 m0,5–2 m2–5 m5–10 m≥ 10 m
Places the wave reached
| Town | Countries reached | Water height | From the source | Deaths |
|---|---|---|---|---|
| Alto da Barra · 1 km | Portugal | 2.4 m | 569 km | |
| Prussia Cove · 8 km | United Kingdom | 1.8 m | 1,833 km | |
| Milltown · 1 km | United Kingdom | 1.8 m | 1,900 km | |
| Penzance · 1 km | United Kingdom | 1.8 m | 1,838 km | |
| Tredavoe · 1 km | United Kingdom | 1.8 m | 1,836 km | |
| Kilroot · 2 km | United Kingdom | 1.2 m | 2,317 km | |
| Hugh Town · 0 km | United Kingdom | 1.2 m | 1,797 km | |
| Lemon Arbour · 1 km | Barbados | 1.2 m | 5,237 km | |
| Sandy Cove · 2 km | Ireland | 0.6 m | 1,941 km | |
| Fort Augustus · 1 km | United Kingdom | 0.6 m | 2,595 km | |
| Joana Alves · 4 km | Portugal | – | 1,475 km | |
| São Martinho · 1 km | Portugal | – | 420 km | |
| Ermida da Lapinha · 4 km | Portugal | – | 1,353 km | |
| Fisterra · 3 km | Spain | – | 985 km | |
| Amsterdam · 3 km | Netherlands | – | 2,442 km | |
| Calaiste · 2 km | Ireland | – | 1,999 km | |
| Dunmore East · 4 km | Ireland | – | 2,021 km | |
| New Ross · 0 km | Ireland | – | 2,047 km | |
| Ayamonte · 1 km | Spain | – | 589 km | |
| El Puerto de Santa María · 1 km | Spain | – | 656 km | |
| Cádiz · 1 km | Spain | – | 648 km | |
| Barcelona · 3 km | Spain | – | 1,535 km |
Towns the wave reached
Alto da Barra2.4 m · 1 km
Prussia Cove1.8 m · 8 km
Milltown1.8 m · 1 km
Penzance1.8 m · 1 km
Tredavoe1.8 m · 1 km
Kilroot1.2 m · 2 km
Hugh Town1.2 m · 0 km
Lemon Arbour1.2 m · 1 km
Sandy Cove0.6 m · 2 km
Fort Augustus0.6 m · 1 km
Joana Alves4 km
São Martinho1 km
Ermida da Lapinha4 km
Fisterra3 km
Amsterdam3 km
Calaiste2 km
Dunmore East4 km
New Ross0 km
Ayamonte1 km
El Puerto de Santa María1 km
Cádiz1 km
Barcelona3 km