1755 Lisbon earthquake
A major earthquake struck Lisbon on November 1, 1755, followed by fires and a tsunami that devastated the city and affected much of Portugal.
Lisbon tsunami: A series of destructive sea waves that struck Lisbon and other Atlantic coasts after the 1755 earthquake. The tsunami was one of the earthquake’s principal secondary hazards.
Lisbon: The capital and largest city of Portugal, situated on the Atlantic coast near the Tagus estuary. The city’s location and dense construction determined the disaster’s human toll.
Sebastião José de Carvalho e Melo: The Portuguese statesman later known as the Marquess of Pombal, who led Lisbon’s recovery after 1755. He directed relief and reconstruction under King Joseph I.
Pombaline architecture: The standardized, earthquake-conscious architectural system developed for Lisbon’s reconstruction after 1755. Its timber-framed structures and regulated construction addressed earthquake risk.
Historical seismology: The reconstruction of past earthquakes using historical records, geological evidence, and archaeological findings. Researchers combine eyewitness reports and physical traces to estimate the event.
Earthquake: Ground shaking caused by the sudden release of energy within Earth’s crust. The Lisbon disaster began with a large seismic rupture.
Tagus River: A river in the Iberian Peninsula that flows through Spain and Portugal to the Atlantic at Lisbon. The estuary placed Lisbon close to waters affected by the tsunami.
King Joseph I of Portugal: King of Portugal from 1750 to 1777, whose government responded to the 1755 disaster under Pombal’s leadership. The crown’s authority shaped emergency measures and the city’s rebuilding.
Lisbon reconstruction after 1755: The rebuilding of Lisbon after the earthquake under plans emphasizing wider streets, regular blocks, and regulated construction. The reconstruction transformed disaster response into a new urban plan.
Modified Mercalli intensity scale: A scale that rates earthquake shaking by its observed effects on people, buildings, and the landscape. Intensity estimates help map shaking where instrumental measurements do not exist.