Portal:Disasters/Selected anniversary/November 2007
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The 1755 Lisbon earthquake, also known as the Great Lisbon Earthquake, took place on November 1, 1755, at 9:40 in the morning. It was one of the most destructive and deadly earthquakes in history, killing between 60,000 and 100,000 people . The earthquake was followed by a tsunami and fire, resulting in the near-total destruction of Lisbon. The earthquake accentuated political tensions in Portugal and profoundly disrupted the country's eighteenth-century colonial ambitions.
The event was widely discussed by European Enlightenment philosophers, and inspired major developments in theodicy and in the philosophy of the sublime. As the first earthquake studied scientifically for its effects over a large area, it signaled the birth of modern seismology. Geologists today estimate the Lisbon earthquake approached magnitude 9 on the Richter scale, with an epicenter in the Atlantic Ocean about 200 km (120 mi) west-southwest of Cape St. Vincent.
The earthquake struck on the morning of 1 November, the Catholic holiday of All Saints' Day. Contemporary reports state that the earthquake lasted between three-and-a-half and six minutes, causing gigantic fissures five-metres (16 ft) wide to appear in the city centre. Survivors rushed to the open space of the docks for safety and watched as the water receded, revealing a sea floor littered by lost cargo and old shipwrecks. Approximately forty minutes after the earthquake, an enormous tsunami engulfed the harbour and downtown, rushing up the Tagus river. It was followed by two more waves. In the areas unaffected by the tsunami, fire quickly broke out, and flames raged for five days. Lisbon was not the only Portuguese city affected by the catastrophe. Throughout the south of the country, in particular the Algarve, destruction was rampant. The shock waves of the earthquake were felt throughout Europe as far as Finland and North Africa. Tsunamis as tall as 20 metres (66 ft) swept the coast of North Africa, and struck Martinique and Barbados across the Atlantic. A three-metre (ten-foot) tsunami hit the southern English coast. Galway, on the west coast of Ireland, was also hit, resulting in the partial destruction of the "Spanish Arch".
