11/01/1755 | 1755 Lisbon Earthquake


The precise location of this earthquake is still unknown today. Even though, it is one of the most studied and strongest earthquakes in the known history of Europe with major influence on contemporary thinking of natural disasters. It caused major distruction both by shaking and a tsunami on Western Iberia, especially Lisbon, and North Western Africa, especially Morocco.

There are several faults around the Gulf of Cadiz which have been considered as the source of this earthquake. Some recent studies even point out the potential of the onset of a evolving subduction zone.

Events in the same region
Date Title Region Preferred Magnitude Quality*
1755 Nov 01st 1755 Lisbon Earthquake Iberia Margin 8.7 B
1761 Mar 31st, 12:15 1761 Cabo San Vicente Earthquake Iberia Margin 7.5 C
  • Silva et al. (2021) -Silva, P. G., Elez, J., Pérez-López, R., Giner-Robles, J. L., Gómez-Diego, P. V., Roquero, E., ... & Bardají, T. (2021). The AD 1755 Lisbon Earthquake-Tsunami: Seismic source modelling from the analysis of ESI-07 environmental data. Quaternary International. - Link
  • Fonseca (2020) -Fonseca, J. F. (2020). A reassessment of the magnitude of the 1755 Lisbon earthquake. Bulletin of the Seismological Society of America, 110(1), 1-17. - Link
  • GHEA (GHEC v1.0) -Albini P., Musson R.M.W., Rovida A., Locati M., Gomez Capera A.A., and Viganò D. (2014). The Global Earthquake History. Earthquake Spectra, May 2014, Vol.30, No.2, pp. 607-624. http://doi.org/10.1193/122013EQS297 - Link
  • Hough (2013) -Hough, S. E. (2013). Missing great earthquakes. Journal of Geophysical Research: Solid Earth, 118(3), 1098-1108. - Link
Event Characteristics
Preferred Magnitude 8.70 (7.20-8.80)
Epicenter 36.500°N, -10.000°E
Depth unknown
Tsunami no/unknown
Paleo-Event no
Quality of Evidence B

Magnitude Range
Year Reference Magnitude
2021 Silva et al. (2021) 8.6
2020 Fonseca (2020) 7.7 (7.2-8.2)
2014 GHEA (GHEC v1.0) 8.5 (8.5-8.8)
2013 Hough (2013) 8.7

This table lists some of the most relevant publications in estimating the moment magnitude of this earthquake. If you think there are other important or new publications, please get in contact.