Episode 1 of 3
Offshore earthquake strikes Portugal
- When
- 31 March 1761
- Where
- SWIM, off the southwest coast of Portugal
- Part of
- Lisbon Earthquake of 1761
A strong earthquake struck off the Portuguese coast on 31 March 1761 at 12:05 local time, with its epicenter in the SWIM off the southwest coast.
The earthquake occurred on 31 March 1761 at 12:05 local time, striking off the coast of Portugal. While the exact epicenter location varies among estimates, the general area is in the SWIM, off the southwest coast of Portugal. The event was the strongest in the region since the 1755 Lisbon earthquake, and both that earlier event and the 1969 Lisbon earthquake involved slip on faults in the SWIM.
Sources
- 1761 Lisbon earthquake Wikipedia, revision of 2026-09-26
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.