Calabrian Earthquakes (1783): Disaster in Southern Italy

The Calabrian earthquakes of 1783 were a sequence of five major earthquakes that struck southern Calabria and north-eastern Sicily between 5 February and 28 March 1783. They destroyed or badly damaged some 180 towns and villages in the Kingdom of Naples and killed an estimated 30,000 to 50,000 people. The disaster also produced one of the first scientific surveys of an earthquake zone.

Background

Calabria, the “toe” of the Italian peninsula, lies on one of the most active tectonic zones in the Mediterranean. Faults run along its mountainous spine and across the Strait of Messina. The region had already suffered heavy earthquakes, including the Sicily earthquake of 1693 that struck the opposite coast.

In the 1780s southern Calabria was a poor, largely rural province of the Kingdom of Naples, ruled by Ferdinand IV. Most houses were built of rubble stone and mud mortar, which collapsed easily in strong shaking. Feudal lords and the Church owned much of the land.

The sequence of earthquakes

The first and most destructive shock came around midday on 5 February 1783. Its epicentre lay in the plain of Gioia Tauro, near towns such as Oppido and Terranova. Modern estimates put its magnitude at about 7. Within minutes dozens of towns were reduced to rubble, and the shaking also caused serious damage in Messina and Reggio.

A second major shock followed shortly after midnight on 6 February near Scilla, on the Strait of Messina. Survivors had gathered on the beach to escape falling buildings. A great mass of rock from the nearby cliff of Monte Paci crashed into the sea and generated a local tsunami. The wave swept the beach and killed roughly 1,500 people, among them the Prince of Scilla, Fulco Ruffo.

Further strong earthquakes struck on 7 February, 1 March and 28 March, each centred further north. The last shock, in central Calabria near Girifalco and Borgia, was almost as strong as the first. Aftershocks continued throughout the year.

The human toll

Counting the dead was difficult, because parish records were destroyed along with the churches that kept them. Contemporary official figures gave close to 30,000 deaths from the shocks themselves, while modern estimates that include later deaths from epidemics, exposure and hunger reach about 50,000. Oppido, Terranova, Polistena and Seminara were among the worst hit, and in some towns a large share of the population died.

Survivors described being trapped for days under ruins, and accounts tell of people dug out alive long after the first shock. Livestock, mills and stored food were lost, so famine threatened in the following months. Many families left the ruined hill towns for the coast or for other provinces, and some settlements were never rebuilt on their old sites.

In Messina, the elegant row of palaces along the harbour, the Palazzata, was badly damaged, and parts of the city burned. The death toll there was far lower than in Calabria, but the economic blow to Sicily’s second city was severe.

Effects on the landscape

The earthquakes transformed the landscape. Hillsides slid into valleys, sometimes carrying olive groves and houses with them. Landslides blocked rivers and formed more than 200 temporary lakes, which later became breeding grounds for malaria. In the plain of Rosarno, sand and water erupted from the ground in small craters, a process now known as liquefaction.

These features were drawn and described in detail by the investigators who came afterwards, and their illustrations remain useful to geologists today.

Response and scientific study

The government in Naples sent the vicar-general Francesco Pignatelli with wide powers to organise relief. Survivors lived for months in wooden huts, and disease spread in the damp conditions, adding to the death toll.

The Royal Academy of Sciences and Letters of Naples dispatched a commission to study the disaster. Its secretary, Michele Sarconi, published the results in 1784 together with an atlas of engravings based on drawings by Pompeo Schiantarelli and Ignazio Stile. The report recorded damage town by town and described ground cracks, landslides and the new lakes, making it a landmark in the history of seismology.

Foreign observers also visited. The British envoy in Naples, Sir William Hamilton, toured the region in spring 1783 and sent an account to the Royal Society in London. The French geologist Déodat de Dolomieu published his own study in 1784.

Reconstruction

To pay for rebuilding, the crown created in 1784 a fund called the Cassa Sacra, which took over and sold property of monasteries and other church bodies in southern Calabria. It was meant to benefit the poor, but much of the land ended up with wealthy buyers, and the fund was wound up in the 1790s amid accusations of mismanagement.

Several towns, including Palmi, Mileto and Cittanova, were rebuilt on new grid plans with wider streets, and new building rules encouraged a timber-framed style of construction designed to resist earthquakes.

Timeline

• 1783, 5 February: The main shock devastates the plain of Gioia Tauro and damages Messina.
• 1783, 6 February: A shock near Scilla triggers a rockfall and tsunami that kills about 1,500 people.
• 1783, 7 February: A third strong earthquake strikes further north.
• 1783, 1 March: A fourth shock hits central Calabria.
• 1783, 28 March: The last major earthquake strikes near Girifalco.
• 1784: Sarconi’s report is published and the Cassa Sacra is created.

Why it matters

The 1783 earthquakes were among the worst natural disasters in Italian history. Alongside the Lisbon earthquake of 1755, they encouraged Enlightenment scholars to study earthquakes through careful observation rather than speculation, and they shaped building practice in southern Italy until the Messina earthquake of 1908.