Seismic history
Major earthquakes, volcanic eruptions and geological events in Portugal, 1900–2026, with sources and detailed information.
Total earthquakes
6
M5+
Strongest
M6.0
| Date | Magnitude | Location | Depth | Source |
|---|---|---|---|---|
| 1909-04-23 | 6.0 | 2 km SW of Alcochete, Portugal | 10 km | USGS Earthquake Hazards Program |
| 1927-05-18 | 5.4 | 9 km ESE of Vale da Amoreira, Portugal | 35 km | USGS Earthquake Hazards Program |
| 1956-08-16 | 5.3 | 41 km SSW of Carvoeiro, Portugal | 15 km | USGS Earthquake Hazards Program |
| 1926-02-28 | 5.2 |
| 0 km SE of Vale da Amoreira, Portugal |
| 10 km |
| USGS Earthquake Hazards Program |
| 2024-08-26 | 5.0 | 56 km W of Sines, Portugal | 7 km | USGS Earthquake Hazards Program |
| 1978-08-14 | 5.0 | 40 km WSW of Chipiona, Spain | 30 km | USGS Earthquake Hazards Program |