The eruption of Mt Vesuvius in AD 79 and the destruction of Pompeii and Herculaneum, including the literary evidence (Pliny the Younger), the volcanological evidence, the human evidence (body casts and skeletons), and the date controversy

What this dot point is asking

NESA expects you to integrate three evidence types (literary, volcanological, and human-archaeological) on the AD 79 eruption, name the key ancient sources and modern scientists, engage with the August vs October date controversy, and explain what the eruption itself reveals about the everyday life of the two cities at the moment of destruction.

The answer

The literary evidence: Pliny the Younger

The principal ancient account is Pliny the Younger's two letters to the historian Tacitus, written around AD 106 to 108 (Epistles 6.16 and 6.20). Pliny was 17 at the time of the eruption and staying with his uncle Pliny the Elder, commander of the Roman fleet at Misenum on the north-western tip of the Bay of Naples, around 30 km from Vesuvius.

Letter 6.16. Records the death of Pliny the Elder. The cloud over Vesuvius first appeared around midday: "its general appearance can best be expressed as being like an umbrella pine, for it rose to a great height on a sort of trunk and then split off into branches." Pliny the Elder, a natural philosopher and admiral, ordered a ship and sailed across the bay to investigate and rescue. He landed at Stabiae, dined and slept at the house of his friend Pomponianus, and rose the next morning to find the eruption column collapsed and pyroclastic activity reaching the coast. He died on the beach, probably from inhalation of toxic fumes from the pyroclastic gases.

Letter 6.20. Records Pliny the Younger's own experience at Misenum. The ash and earth tremors intensified through the night. He and his mother fled inland; she urged him to leave her to save himself; he refused. After the ash settled they returned to Misenum and learned of his uncle's death.

Pliny's description of the eruption column is so accurate that volcanologists use the term "Plinian eruption" to describe this type of explosive volcanic event. The letter is also our only first-hand source on the timing and physical experience of the eruption.

The volcanological evidence

Modern volcanological reconstruction (Sigurdsson, Carey, Cornell, and Pescatore 1985) identifies two phases of the eruption.

Phase 1: Plinian (around midday to early evening, day 1). A vertical eruption column rose to around 30 kilometres into the stratosphere. Pumice and ash fell on Pompeii, accumulating at around 15 centimetres per hour. By dusk, around 2.8 metres of pumice had buried Pompeii. Roofs collapsed under the weight; many residents who sheltered indoors died from collapsing buildings.

Phase 2: Pelean (overnight into day 2). The eruption column collapsed. Six pyroclastic surges and flows (high-velocity clouds of superheated gas, ash, and rock fragments, at temperatures of 300 to 500 degrees Celsius) raced down the volcano. The first surges reached Herculaneum (around 1am) and buried the city under 20 metres of consolidated volcanic material. Later surges reached Pompeii, killing any remaining inhabitants instantly.

The volcanological evidence corrects earlier views (held into the late 20th century) that most victims died of asphyxiation under pumice. Estelle Lazer's anthropological analysis confirms most victims died in the pyroclastic surges, with high temperatures producing characteristic skull and limb deformations.

The human evidence: body casts and skeletons

Body casts at Pompeii. In 1863, director Giuseppe Fiorelli developed the plaster cast technique. The bodies of victims had decomposed in the hardened ash, leaving cavities. By pouring liquid plaster into these voids, Fiorelli produced detailed casts including facial features, clothing, and the moment of death.

Over 100 casts have been made. The Garden of the Fugitives preserves a group of 13 victims (probably a family) who died together fleeing the eruption. The "Pompeii Couple" and the body of a chained dog from the House of Vesonius Primus are iconic images.

Recent cast work has used resin instead of plaster, allowing visible internal skeletal material. CT scanning of casts (since 2015) has revealed bone fractures, dental work, and demographic detail invisible from the exterior.

Skeletons at Herculaneum. Until 1980, scholarship assumed most Herculaneum residents escaped because few bodies were found in the buildings. The 1980-1982 excavation of the boat sheds along the ancient shoreline (then several hundred metres inland from the modern coast, the AD 79 coastline) revealed around 340 skeletons clustered together, many huddled in family groups. The "Ring Lady," with two gold rings and bracelets, was elite; nearby skeletons showed dental decay and bone density consistent with manual labour.

Sara Bisel's (1987) anthropological methodology has been refined by Estelle Lazer (Resurrecting Pompeii, 2009) and others. Strontium isotope analysis (introduced from 2010) is beginning to identify the geographic origins of individual victims.

The date controversy

The traditional date of the eruption is 24 August AD 79, derived from Pliny the Younger's letter (Epistles 6.16): "nonum kal Septembres" (the ninth day before the kalends of September). This date was canonical until the early 21st century.

A 2018 excavation in Regio V at Pompeii uncovered a charcoal graffito reading "XVI K NOV" (the sixteenth day before the kalends of November, i.e. 17 October). The graffito was found in a house under reconstruction after the AD 62 earthquake, and the charcoal suggests recent activity. If correct, the eruption occurred shortly after 17 October, most likely on 24 October AD 79.

Other evidence supports the October date: carbonised pomegranates and figs (autumn fruits), heavy clothing on some victims, and braziers found alight (more typical of cooler weather). The Pliny manuscript tradition is also corrupt; some manuscripts read "Novembres" instead of "Septembres."

Most current scholarship (Mary Beard 2018, the Pompeii archaeological park since 2018) treats 24 October AD 79 as more likely. Some scholars retain 24 August as the traditional date pending further evidence.

The destruction at a glance

Historiography

Haraldur Sigurdsson, Steven Carey, and others (1985) produced the canonical volcanological reconstruction.

Estelle Lazer (Resurrecting Pompeii, 2009) is the canonical anthropological study of the Pompeian skeletons and casts.

Mary Beard (Pompeii, 2008; The Roman Eruption that Buried Pompeii, BBC, 2010) integrates the volcanological, literary, and human evidence and endorses the October dating.

Sara Bisel (The Secrets of Vesuvius, 1990) opened the modern anthropological study of the Herculaneum victims.

How to read a source on this topic

Section I sources on the eruption typically include extracts from Pliny the Younger, photographs of body casts (the Garden of the Fugitives), the Herculaneum boat shed skeletons, volcanological diagrams, or maps of the pyroclastic flow paths. Three reading habits.

First, distinguish first-hand and reconstructed evidence. Pliny saw the eruption column from Misenum but did not enter Pompeii or Herculaneum. Modern volcanological diagrams are reconstructions from physical evidence and Pliny's account. State which type of evidence the source is.

Second, weigh the cast against the cause of death. Fiorelli's casts capture the moment of death but the cause was usually the pyroclastic surge, not asphyxiation. The famous "writhing" postures reflect cadaveric spasm at high temperature.

Third, fix the date carefully. The August vs October debate is current. Markers since 2019 expect candidates to know both dates and the evidence for each.

Common exam traps

Treating Pliny as a contemporary first-hand source for Pompeii. Pliny observed from Misenum, around 30 km away, and wrote roughly 30 years later. He is contemporary for the volcanological observation but secondary for the cities themselves.

Misidentifying the cause of death. Most victims died in the pyroclastic surges, not from collapsing roofs. Cite Lazer.

Skipping the date controversy. Both 24 August and 24 October AD 79 should be mentioned for high-band answers in 2026.

Confusing body casts and skeletons. Casts are Pompeii (decomposed bodies in ash voids); skeletons are mostly Herculaneum (preserved by the pyroclastic flow). Different evidence, different cities.

In one sentence

The AD 79 eruption of Mt Vesuvius, dated traditionally to 24 August but probably to 24 October on the basis of the 2018 Regio V charcoal graffito, is documented through Pliny the Younger's two letters to Tacitus (Epistles 6.16 and 6.20), the volcanological reconstruction by Sigurdsson and colleagues (1985) identifying a Plinian column and overnight pyroclastic surges, the over 100 Pompeian body casts pioneered by Fiorelli in 1863, and the 340 Herculaneum skeletons recovered from the boat sheds in 1980-1982 and analysed by Bisel and Lazer, evidence Mary Beard integrates as the most fully documented natural disaster of the ancient world.