1755 Lisbon earthquake
The 1755 Lisbon earthquake took place on November 1, 1755, at 9:20 in the morning. It was one of the most destructive and deadly earthquakes in history, killing well over 100,000 people. The quake was followed by a tsunami and fire, resulting in the near total destruction of Lisbon. The earthquake accelerated political tensions in Portugal and profoundly disrupted the country's 18th century colonial ambitions. The event was widely discussed by European Enlightenment philosophers, inspired the concept of the sublime, and became the subject of the first scientific study of an earthquake's effect over a large area. Geologists today estimate that the Lisbon earthquake approached magnitude 9 on the Richter scale.
The earthquake
The earthquake struck on the morning of November 1, the All Saints Day Catholic holiday. Contemporary reports state that the earthquake lasted between three-and-a-half and six minutes, causing gigantic fissures five meters wide to rip apart the city center. The 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. About 30 minutes after the earthquake, an enormous tsunami engulfed the harbor and the city downtown, 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 generalized. The shockwaves of the earthquake were felt throughout Europe as far as Finland and North Africa. Tsunamis up to twenty meters in height swept the coast of North Africa, and struck Martinique and Barbados across the Atlantic.
Of a Lisbon population of 275,000, about 90,000 were killed. Another 10,000 were killed across the Mediterranean in Morocco. Eighty-five percent of Lisbon's buildings were destroyed, including its famous palaces and libraries, as well as most examples of Portugal's distinctive 16th century Manueline architecture. Several buildings which had suffered little damage due to the earthquake were destroyed by the fire. The brand new Opera House, opened only six months before (under the ill-fated name Phoenix Opera), was burned to the ground. The Royal Palace, which stood just beside the Tagus river in the modern square of Terreiro do Paço, was destroyed by the earthquake and tsunami. Inside, the 70,000-volume royal library as well as hundreds of works of art, including paintings by Titian, Rubens, and Correggio, were lost. The precious royal archives disappeared together with detailed historical records of explorations by Vasco da Gama and other early navigators. The earthquake also destroyed major churches in Lisbon, namely the Cathedral of Santa Maria, the Basilicas of São Paulo, Santa Catarina, São Vicente de Fora, and the Misericordia Church. The ruins of the Carmo convent can still be visited today in the centre of the city. The Royal Hospital of All-Saints (the biggest public hospital at the time) was consumed by fire and hundreds of patients burned to death. The tomb of national hero Nuno Alvares Pereira was also lost.
Many animals sensed danger and fled to higher ground before the water arrived. The Lisbon quake is the first documented case of such a phenomenon in Europe.
The day after
Due to a stroke of luck, the royal family escaped unharmed from the catastrophe. King Joseph I of Portugal and the court had left the city, after attending mass at sunrise, fulfilling the wish of one of the king's to spend the holiday away from Lisbon. After the catastrophe, Joseph I developed a fear of living within walls, and the court was accommodated in a huge complex of tents and pavilions in the hills of Ajuda, then on the outskirts of Lisbon. The king's claustrophobia never waned, and it was only after Joseph's death that his daughter Maria I of Portugal began building the royal Palace of Ajuda, which still stands on the site of the old tented camp.
Like the king, the prime minister Sebastião de Melo (the Marquis of Pombal) survived the earthquake. With the pragmatism that characterized his rule, the prime minister immediately started to organize the reconstruction. He was not paralysed with shock, and is reported to have said: Now? Bury the dead and feed the living. He sent firefighters into the city to extinguish the flames, and ordered teams to remove the thousands of corpses, quelling fears that corpses would lead to an epidemic.
As for the city itself, the prime minister and the king quickly hired architects and engineers, and less than a year later, Lisbon was already free from debris and undergoing reconstruction. The king was keen to have a new, perfectly ordained city. Big squares and rectilinear, large avenues were the mottos of the new Lisbon. At the time, somebody asked the Marquis of Pombal the need of such wide streets. The Marquis answered: one day they will be small. And indeed, the chaotic traffic of Lisbon reflects the wisdom of the reply. The new downtown, known today as the Pombaline Downtown (Baixa Pombalina), is one of Lisbon's attractions. Pombaline buildings are among the first seismically-protected constructions in the world. Small wooden models were built for testing, and earthquakes were simulated by marching troops around them. Sections of other Portuguese cities, like the Vila Real de Santo António in Algarve, were rebuilt along Pombaline principles.
Social and philosophical implications
The earthquake shook much more than cities and buildings. Lisbon was the capital of a devout Catholic country, with a history of investments in the church and evangelisation in the colonies. Moreover, the catastrophe struck on a Catholic holiday and destroyed almost every important church. For 18th century theology and philosophy, this manifestation of the anger of God was difficult to explain.
The earthquake strongly influenced many thinkers of the European Enlightenment. Many contemporary philosophers mentioned or alluded to the earthquake in their writings, notably Voltaire in Candide and in his Poème sur le désastre de Lisbonne (Poem on the Lisbon disaster). The arbitrariness of survival motivated Voltaire's Candide and its satire of the idea that this was "the best of all possible worlds"; as Theodor Adorno wrote, "[t]he earthquake of Lisbon sufficed to cure Voltaire of the theodicy of Leibniz" (Negative Dialectics 361). In the later twentieth century, following Adorno, the 1755 earthquake has sometimes been analogized to the Holocaust as a catastrophe so tremendous as to have a transformative impact on European culture and philosophy.
The concept of the sublime derived in part from Immanuel Kant's attempts to comprehend the enormity of the Lisbon quake and tsunami, and Kant published three separate texts on the Lisbon earthquake. (Through the broad later influence of theories of the sublime, the Lisbon earthquake was one factor in a sea change in European aesthetic thought, with an effect which would not be fully appreciated until the late 19th century.) The young Kant, fascinated with the earthquake, collected all the information available to him in news pamphlets, and used it to formulate a theory of the causes of quakes. Kant's theory, which involved the shifting of huge subterranean caverns filled with hot gases, was (though ultimately falsified) one of the first systematic modern attempts to explain earthquakes by positing natural, rather than supernatural, causes; it was a forerunner of the science of seismology.
Werner Hamacher has claimed that the earthquake's consequences extended into the vocabulary of philosophy, making the common metaphor of firm "grounding" for philosophers' arguments shaky and uncertain: "Under the impression exerted by the Lisbon earthquake, which touched the European mind in one [of] its more sensitive epochs, the metaphorics of ground and tremor completely lost their apparent innocence; they were no longer merely figures of speech" (263). Hamacher claims that the foundational certainty of Descartes' philosophy began to shake following the Lisbon earthquake.
In Portuguese internal politics, the earthquake was devastating. The prime minister was the favourite of the king, but the aristocracy despised him as an upstart son of a country squire. (Although the prime minister Sebastião de Melo is known today as Marquis of Pombal, the title was only granted in 1770). The prime minister in turn disliked the old nobles, whom he considered corrupt and incable of practical action. Before November 1, 1755 there was a constant struggle for power and royal favour, but afterwards, the competent response of the Marquis of Pombal effectively severed the power of the old aristocratic factions. Silent opposition and resentment of King Joseph I began to rise. This would culminate in an attempted assassination of the king, and the elimination of the powerful Duke of Aveiro and the Távora family.
The birth of seismology
The Prime Minister's response was not limited to the practicalities of reconstruction. The Marquis ordered a query sent to all parishes of the country regarding the earthquake and its effects. Questions included:
- how long did the earthquake last?
- how many aftershocks were felt?
- what kind of damage was caused?
- did animals behave strangely? (this question may sound strange, but it anticipated studies by Chinese seismologists in the 1960s)
- what happened in wells and water holes?
The answers to these and other questions are still archived in the Tower of Tombo, the national historical archive. Studying and cross-referencing the priests' accounts, modern scientists were able to reconstruct the event from a scientific perspective. Without the query designed by the Marquis of Pombal, this would be impossible. Because he was the first to attempt an objective scientific description of the broad causes and consequences of an earthquake, the Marquis is regarded as a precursor of modern seismological scientists.
The geological causes of this earthquake and the seismic activity in the region continue to be discussed and debated by contemporary scientists. Since Lisbon is located in a centre of a tectonic plate, there are no obvious reasons for the event, since almost all tectonic events occur at plate borders. Some geologists have suggested that the earthquake may indicate the early development of an Atlantic subduction zone (i.e., a convergence zone), and the beginning of the closure of the Atlantic ocean.
See also: List of earthquakes
References
- Benjamin, Walter. "The Lisbon Earthquake." In Selected Writings vol. 2. Belknap, 1999. ISBN 0674945867. The often abstruse critic Benjamin gave a series of radio broadcasts for children in the early 1930s; this one, from 1931, discusses the Lisbon earthquake and summarizes some of its impact on European thought.
- Brooks, Charles B.. Disaster at Lisbon: The Great Earthquake of 1755. 1994.
- Chase, J. "The Great Earthquake At Lisbon (1755)". Colliers Magazine, 1920.
- Dynes, Russell Rowe.. "The dialogue between Voltaire and Rousseau on the Lisbon earthquake: The emergence of a social science view." University of Delaware, Disaster Research Center, 1999.
- Hamacher, Werner. "The Quaking of Presentation." In Premises: Essays on Philosophy and Literature from Kant to Celan, pp. 261-293. Stanford University Press, 1999. ISBN 0804736200.
- Kendrick, T.D.. The Lisbon Earthquake. Philadelphia and New York: J. B. Lippincott, 1957.
- Neiman, Susan. Evil in Modern Thought: An Alternative History of Modern Philosophy. Princeton University Press, 2002. This book centers on philosophical reaction to the earthquake, arguing that the earthquake was responsible for modern conceptions of evil.
- Ray, Gene. "Reading the Lisbon Earthquake: Adorno, Lyotard, and the Contemporary Sublime." Yale Journal of Criticism 17.1 (2004): pp. 1-18.
- Seco e Pinto, P.S. (Editor). Earthquake Geotechnical Engineering: Proceedings of the Second International Conference, Lisbon, Portugal, 21-25 June, 1999. ISBN 9058091163
- Weinrich, Harald. "Literaturgeschichte eines Weltereignisses: Das Erdbeben von Lissabon." In Literatur für Leser, pp. 64-76. Stuttgart: Kohlhammer, 1971. ISBN 3170872257. In German. Cited by Hamacher as a broad survey of philosophical and literary reactions to the Lisbon earthquake.