---
title: "Pompeii: The last eighteen hours"
publication: Awescroll
number: "002"
url: https://awescroll.com/002-pompeii
published: 2026-09-22
updated: 2026-09-22
reading_time: 10 min
language: en
---

# Pompeii

The last eighteen hours.

*No. 002 · 10 min read · 22 September 2026*

In the year 79, at about one in the afternoon, a cloud stood up over the Bay of Naples in the shape of a pine tree. About eighteen hours later, a Roman city of ten to twenty thousand people was gone. It stayed gone for almost seventeen hundred years.

One person who watched it happen wrote it down. He was seventeen.


---

*02 · The mountain*

*THE BAY OF NAPLES · YEAR 79*

## No one alive had seen what the mountain could do.

Vesuvius had been quiet for longer than anyone could remember, a green mountain with vineyards up its flanks. One geographer had guessed at its past: Strabo, decades earlier, looked at the burnt summit and wrote that it had once held fire, since gone out. Seventeen years earlier an earthquake had wrecked the towns around it, and they were still rebuilding; nobody read it as a warning, because a mountain whose fire has gone out does not warn. Around the mountain and the bay lived the towns that were about to enter this story.

- SE · Pompeii: A trading town of ten to twenty thousand people, downwind of the summit. The wind decided what fell on it.
- W · Herculaneum: Small and rich, at the mountain's western foot, upwind. Almost no pumice would fall here. That did not save it.
- S · Stabiae: Villas along the shore, further down the coast.
- BAY · Misenum: The base of the Roman fleet, some thirty kilometres away across the water. Far enough to watch. Not far enough to be untouched. (≈ 30 KM)

> **WHY NOBODY KNEW**: Romans knew volcanoes: Etna smoked in plain sight, and Strabo had read Vesuvius&\#39;s ash-grey, cinder-eaten summit as the trace of craters of fire, quenched for lack of fuel. What no one had was a reason to think the fire could come back: the mountain had not erupted in living memory, and its slopes were farmland. The word people reached for afterwards was not volcano. It was cloud.

> **THE RECONSTRUCTION**: The city follows the archaeological plan at a simplified block scale. Roofs, upper storeys and minor streets are interpretive. Regional terrain uses modern elevation data; the pre-eruption summit and ancient shoreline cannot be recovered exactly. Buildings and landscape share one scale.


---

*03 · The pine*

*DAY ONE · ABOUT 13:00*

## A cloud stands up in the shape of a pine.

The trunk was rock: magma torn into foam and ash, driven upwards. Where it ran out of force it spread sideways into a canopy, the shape a Mediterranean pine makes. From across the bay at Misenum, a seventeen-year-old watched it climb.

…in likeness and form it more closely resembled a pine-tree than anything else, for what corresponded to the trunk was of great length and height, and then spread out into a number of branches. (PLINY THE YOUNGER, LETTER 6.16, WRITTEN ABOUT 25 YEARS LATER)

> **THE ONLY WITNESS**: The only eyewitness account that survives is two letters Pliny the Younger wrote to the historian Tacitus, about a quarter of a century afterwards. Volcanologists still call this type of eruption Plinian, after him: a column driven into the stratosphere, then a canopy, then the fall.

> **THE NUMBER**: The column reached about 32 kilometres at its highest, by the standard reconstruction: three times as high as airliners fly. It stood on nothing but thrust.


---

*04 · The fall*

*DAY ONE · AFTERNOON · POMPEII*

## Stone falls like heavy rain.

The wind carried the canopy southeast, over Pompeii, and the stone began to come down: pumice, pieces the size of walnuts, then larger. Light enough that most of it did not kill. Heavy enough that it did not stop, at about 15 centimetres an hour, hour after hour.

- HOURS OF FALL: 0.0 to 7.0
- COLUMN HEIGHT: 14 to 32 KM
- PUMICE ON POMPEII: 0 to 105 CM

In order: ABOUT 13:00 · THE FALL BEGINS · ROOFS BEGIN TO FAIL · THE PUMICE TURNS GREY.

> **Readouts**: The rate is the published average, about 15 cm an hour; between the published points the readouts are a smooth reconstruction, not measurements.

> **WHY IT FLOATS**: Pumice is magma that foamed as its gas came out of solution, then froze that way: stone full of bubbles, lighter than water. That is why a rain of rock could last for hours before it crushed anything. The crushing came from the total, not the pieces.


---

*05 · The roofs*

*DAY ONE → DAY TWO · THE SAME FALL, AT STREET LEVEL*

## The roofs go first.

A Roman roof was tile on timber. Under 40 to 60 centimetres of pumice, a few hours in, roofs began to break, and the town&\#39;s two ways to die opened at once: stay inside under a failing ceiling, or go out under the falling stone. Hundreds stayed. Watch the street fill.

From 13:00 to 07:30 on the second day the pumice rises from 0 to about 280 cm.

In order: ABOUT 13:00 · ROOFS BEGIN TO FALL · NIGHT · THE FALL GOES ON · THE CURRENTS ARRIVE.

> **Readouts**: From about 13:00 on day one to the following morning the pumice over Pompeii rose to about 2.8 metres; roofs began to fall under 40 to 60 centimetres of it.

> **THE COUNT**: Of the 1 044 recognisable bodies excavations have recovered at Pompeii, 394 lay in the pumice layer: killed during the fall, mostly by collapsing roofs and falling stone, while leaving was still possible. The rest died of what came after.


---

*06 · Your height*

*DAY ONE · EVENING · A MEASURE*

## Now stand in that street.

*STAND IN THE STREET*

The same fall, measured against you. Type your height and the clock answers.

> **Note**: The clock runs at the published average for the whole fall, about 15 centimetres an hour; the real fall came in pulses, and the currents of the second morning killed regardless of depth. Your height goes no further than this page.


---

*07 · The admiral*

*BACK TO DAY ONE · AFTERNOON · THE BAY*

## The admiral sails toward it.

While the stone came down on Pompeii, the man commanding the fleet at Misenum was the boy&\#39;s uncle: Pliny the Elder, author of the largest encyclopaedia Rome ever produced. His first order was for a light boat, to look closer. Then a message arrived from a woman named Rectina, trapped under the mountain, and the observation trip became a rescue: he launched the warships and steered them at the shore everyone else was fleeing.

…ashes were beginning to fall upon the ships, hotter and in thicker showers as they approached more nearly, with pumice-stones and black flints, charred and cracked by the heat. (PLINY THE YOUNGER, LETTER 6.16)

![A night painting of Vesuvius in full eruption, a column of fire and smoke over the dark bay, tiny figures watching from the shore](https://awescroll.com/photos/vesuvius-volaire.jpg)
*No picture of the year 79 exists. This is the mountain doing it again in 1771, painted from life by Pierre-Jacques Volaire, who climbed it to watch. The scale of people to mountain is the point. (Pierre-Jacques Volaire, 1771 · Art Institute of Chicago, CC0)*

> **HOW IT ENDED FOR HIM**: Blocked from Rectina&\#39;s shore by the fall, he ran for Stabiae, dined with a friend there, and slept while the courtyard outside filled with pumice. At dawn the flames and the smell of sulphur woke the house; on the beach he collapsed and died, probably of the air. His nephew wrote: the corpse suggested a person asleep rather than a dead man.


---

*08 · Herculaneum*

*NIGHT · HERCULANEUM*

## The first current takes Herculaneum.

Herculaneum stood upwind. Almost nothing had fallen on it all day; its people had time, and most of them used it to leave. Some three hundred who stayed went down to the stone boat-houses on the beach, to wait for morning or the sea. In the night, the edge of the column collapsed and came down the mountain as a current of gas and ash moving at ground level, faster than anything can run. It crossed the town in minutes. No one still in the town survived it; how fast they died is the argument below.

> **HOW HOT, EXACTLY**: This is a live argument. One team reads the deposits and a body in the town at about 500 °C or more: hot enough that one victim&\#39;s brain turned to glass, the only case known. Another team reads the bone chemistry of the boat-house dead at under 400 °C: baked, not vaporised, in the shelter of the vaults. The two may both be right about different places. The dead are the same either way.

> **THE GLASS BRAIN**: A man of about twenty, found lying on his bed in the Collegium Augustalium, the hall of the town&\#39;s society for the worship of the emperor; he is thought to have been its caretaker. In 2020 researchers reported fragments of his brain turned to dark glass, the only organic glass of its kind ever found. In 2025 a second study established how it formed: heat above about 510 °C, then cooling fast enough to set the glass before it could burn away.


---

*09 · The column falls*

*NIGHT INTO DAY TWO*

## The column stops holding itself up.

A column like that stands on thrust, like water from a hose. When the vent widens and the gas weakens, it cannot hold, and what went up comes back down onto the mountain and pours outward along the ground: a pyroclastic current, hundreds of degrees, moving like an avalanche that does not care what is in the way. Through the night and into the morning the column fell and recovered again and again. Each fall reached further than the last.

- NIGHT · The first currents: Down the western flank. Herculaneum is crossed and buried; in the end it lies under about 20 metres of rock.
- DAWN · Closer: Successive currents run further down the southern and eastern flanks, toward the towns under the fall.
- ≈ 07:00 · The fourth: The fourth current reaches Pompeii, by the standard reconstruction of the deposits. (DAY TWO)
- AFTER · The largest: The last and largest currents reach Stabiae and lap at Misenum, thirty kilometres out, where the letters were later written.

> **ABOUT THESE HOURS**: No clock survives from that night. Every time here is a reconstruction anchored to two sentences of Pliny: the cloud at about the seventh hour on day one, and the tremors at daybreak on day two. That is why every hour in this story says about.

> **AND THE GROUND ITSELF**: The eruption carried its own earthquakes. In 2024, excavators at Pompeii published two men crushed by a falling wall in the lull between the fall and the currents: the shaking brought down buildings the pumice had not. It does not explain every collapse, but it was a third way to die.


---

*10 · The morning*

*DAY TWO · ABOUT 07:00 · POMPEII*

## The morning current ends it.

By then Pompeii had stood under falling stone for about eighteen hours. The people still alive had climbed as the town filled: in the Garden of the Fugitives, thirteen of them, adults and children, were caught crossing pumice already some three and a half metres deep. The current that came down that morning crossed the walls and the town in about a minute. Nobody it found lived. What it found, it sealed.

> **WHAT KILLED THEM**: The standard study of the Pompeii dead reads the surge layer at 250 to 300 °C: enough to kill in less than a breath, even at the current&\#39;s far edge. Later work argues some died of the ash itself, suffocated rather than burned. Heat or air, the interval was moments.

> **AND THEN**: More ash and rock followed on top of the town until the deposit stood four to six metres deep. Then it stopped. The coastline had moved. The river had moved. Pompeii was a flat grey field with nothing standing but the smell.


---

*11 · Misenum*

*DAY TWO · MORNING · 30 KM AWAY*

## Thirty kilometres out, the day does not come.

At Misenum, across the bay, the boy and his mother had stayed through a night of tremors; toward dawn, sitting out in the open while the buildings swayed, he called for a volume of Livy and read, as if at ease. Then the light that came was grey, and the cloud came down the bay after them over the water. They left the town in a crowd that pressed at their backs, and then the dark caught up.

…the blackness of night overtook us, not that of a moonless or cloudy night, but the blackness of pent-up places which never see the light. (PLINY THE YOUNGER, LETTER 6.20)

You could hear the wailing of women, the screams of little children, and the shouts of men; some were trying to find their parents, others their children, others their wives, by calling for them and recognising them by their voices alone. (THE SAME LETTER)

Some in the crowd said there were no gods any more, and that this night would be the world&\#39;s last. Then the darkness thinned to smoke, the sun came back the colour of an eclipse, and everything they could see stood under ash like dirty snow. Misenum survived. They shook the ash off and went back, to a night passed between hope and fear: there was still no word of his uncle.


---

*12 · The casts*

*1748 → 1863 · THE REDISCOVERY*

## The bodies were gone. Their shapes stayed.

Pompeii was found again in 1748, under farmland that had kept its name as a rumour. For a century the diggers kept hitting hollows in the hardened ash with bones inside and could not say what they were. In 1863 the director of excavations, Giuseppe Fiorelli, understood: the ash had set around the dead before the bodies were gone. He poured plaster into the next hollow before opening it. What came out was not a statue. It was the space a person had left.

Ash hardens around a body. As the body decays it leaves a cavity. Plaster poured into that cavity preserves its shape. This diagram explains the process; it is not a reconstruction of a particular victim.

![A nineteenth-century photograph of several plaster casts of Vesuvius victims, adults lying as they fell, on display in Pompeii](https://awescroll.com/photos/pompeii-casts.jpg)
*Casts of the dead, photographed by Giorgio Sommer around 1875, a decade after the first ones were made. The positions are not arranged. They are where the ash set. (Giorgio Sommer, ~1875 · The Metropolitan Museum of Art, CC0)*

![A plaster cast of a dog twisted onto its back, caught mid struggle, photographed on dark cloth](https://awescroll.com/photos/pompeii-dog.jpg)
*The dog of the House of Orpheus, cast in 1874. It was chained at a door and climbed the pumice as far as the chain allowed. (Giorgio Sommer · The J. Paul Getty Museum, public domain)*

> **WHAT THE CASTS ARE NOT**: About 104 of them exist, and they are evidence, not sculpture; they have also been read wrong for a century. In 2024, DNA from inside the casts showed that the adult with the golden bracelet holding a child, retold for decades as a mother, was an unrelated adult male. The ash kept their shapes. The stories were ours.


---

*13 · The date*

*ONE MORE THING WE GOT WRONG*

## We are not even sure of the day.

Every date in this story so far has been a season, not a day, and that is deliberate. The manuscripts of Pliny&\#39;s letters say 24 August. The town itself keeps disagreeing: autumn fruit in the shops, braziers out, heavier fabrics, wine just sealed from the harvest, and a wind that October fits better than August.

XVI K NOV. 16 days before the Kalends of November · 17 October. Transcription of the date, not a facsimile. The inscription gives no year.

- 79 · The manuscripts: Copies of Pliny's letters give the 24th of August. No original survives; every later date begins by doubting the copies.
- 2018 · The charcoal: A wall in a house under excavation carried a note in charcoal, a material that does not last: the 16th day before the Kalends of November. The 17th of October, with no year. (XVI K NOV)
- 2022 · The synthesis: A major review by Italian institutes concludes the eruption was in autumn, most likely 24 to 25 October, after that inscription was written.
- 2024 · The park: Pompeii's own journal pushes back: the oldest manuscripts all give 24 August, the precise day in October rests on thin ground, and the question stays open.

> **WHY IT MATTERS**: Not for the dead: the hours ran the same. It matters as a measure of the evidence itself. A single charcoal note, its writer unknown and its year unwritten, can stand against seventeen centuries of copied manuscripts, and honest work says so out loud.


---

*14 · Still there*

*THE BAY OF NAPLES · NOW*

## The mountain is still there.

Vesuvius last erupted in March 1944, into the middle of a world war: it buried villages in lava, killed 26 people, and wrecked some 80 Allied bombers parked at an airfield named Pompeii. Since then, nothing: the longest quiet spell the mountain has had in centuries. Volcanologists do not read that as mercy: the reservoir is still there, six to eight kilometres down, and a long rest is when a volcano like this can store fresh magma. What nobody can do is time it.

![Black and white film: a vast ash column boiling upward from Vesuvius, filling the frame](https://awescroll.com/photos/vesuvius-1944-poster.jpg)
*Sixteen seconds of March 1944: the column boiling over the crater, filmed for the United News newsreel during the Allied occupation. The same mountain, the same shape, eighteen and a half centuries later. The clip runs silent; the newsreel’s narration was never the mountain’s sound. (United News / US Office of War Information, 1944 · National Archives, public domain)*
*Video: https://awescroll.com/photos/vesuvius-1944.mp4*

The oldest volcano observatory in the world has watched it since 1841. Today about 670 000 people live in the official red zone on its flanks, with a national plan that, once the order is given, is designed to move all of them out in 72 hours, and around three million live within reach of a bad day. Pompeii, a third of it still under the ash, is visited by millions every year. They walk the streets, look up, and see it: green, quiet, close.

From the pine tree to the last current was about eighteen hours. Emptying the mountain&\#39;s slopes, when the order comes, is planned to take seventy-two.

## Sources & notes

1. [Pliny the Younger, Letters 6.16 and 6.20, to Tacitus, translated by J. B. Firth (1900), at attalus.org: the pine-tree cloud, the seventh hour, the 24th of August in the manuscripts, the rescue fleet, ashes on the ships, the death at Stabiae, the darkness of pent-up places, the cries, the ash like snow](https://www.attalus.org/old/pliny6.html) (archival copy)
2. [Strabo, Geography 5.4.8, translated by H. L. Jones (Loeb, 1923), at LacusCurtius: Vesuvius before 79 as an ash-coloured summit of cinder-eaten rock, read as a district that in earlier times was on fire and had craters of fire, then quenched for lack of fuel](https://penelope.uchicago.edu/Thayer/e/roman/texts/strabo/5d*.html) (archival copy)
3. [Sigurdsson, Carey, Cornell and Pescatore, The eruption of Vesuvius in A.D. 79 (National Geographic Research 1, 1985), abstract: the Plinian phase from shortly after noon, about 7 hours of white pumice, the six surges, the first overwhelming Herculaneum, the fourth reaching Pompeii about 7 a.m., the largest reaching Stabiae and Misenum](https://digitalcommons.uri.edu/gsofacpubs/1114/) (primary)
4. [Sparice and colleagues, Frontiers in Earth Science (2024, with Pompeii park co-authors): pumice fall on Pompeii from around 1 p.m. at an average 15 cm an hour, maximum fall deposit 2.8 to 2.9 m, roofs collapsing under 40 to 60 cm, the currents from the early morning of the second day; the paper's central case is the eruption's own earthquakes, including two men crushed by a falling wall in the lull between the fall and the currents](https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2024.1386960/full) (secondary)
5. [Carey and Sigurdsson, Temporal variations in column height and magma discharge rate during the 79 A.D. eruption of Vesuvius (GSA Bulletin 99, 1987): the column's maximum of about 32 km](https://doi.org/10.1130/0016-7606(1987)99%3C303:TVOCHA%3E2.0.CO;2) (primary)
6. [Smithsonian Institution, Global Volcanism Program, Vesuvius: the eruption's magnitude (VEI 5, which the catalogue itself marks with a question mark)](https://volcano.si.edu/volcano.cfm?vn=211020) (primary)
7. [Luongo, Perrotta, Scarpati and colleagues, Impact of the AD 79 explosive eruption on Pompeii, part II (Journal of Volcanology and Geothermal Research 126, 2003): 1 044 recognisable bodies plus about 100 more from scattered bone, 394 of them in the pumice-fall layer](https://www.sciencedirect.com/science/article/abs/pii/S0377027303001471) (primary)
8. [Mastrolorenzo, Petrone, Pappalardo and Sheridan, Lethal thermal impact at periphery of pyroclastic surges (PLoS ONE, 2010): the Pompeii dead exposed to about 250 to 300 °C; heat, not asphyxia, at the S4 surge's edge](https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0011127) (primary)
9. [Petrone and colleagues, Heat-induced brain vitrification from the Vesuvius eruption (New England Journal of Medicine 382, 2020): the vitrified brain of the young guardian at Herculaneum; charred wood at the site suggesting about 520 °C](https://www.nejm.org/doi/full/10.1056/NEJMc1909867) (primary)
10. [Giordano and colleagues, Unique formation of organic glass from a human brain (Scientific Reports 15, 2025): the glass formed above about 510 °C in a short-lived, dilute, very hot current, then cooled fast; the burying deposits at 315 to 465 °C](https://www.nature.com/articles/s41598-025-88894-5) (primary)
11. [Pensa, Giordano, Corrado and Petrone, Scientific Reports (2023): the first current into Herculaneum as a short-lived ash-cloud surge at about 495 to 555 °C; the town buried by later, cooler currents](https://www.nature.com/articles/s41598-023-32623-3) (primary)
12. [Martyn and colleagues, A re-evaluation of manner of death at Roman Herculaneum (Antiquity 94, 2020): collagen in the boat-house ribs implies exposure below about 400 °C; the argument that those victims baked rather than vaporised](https://www.cambridge.org/core/journals/antiquity/article/reevaluation-of-manner-of-death-at-roman-herculaneum-following-the-ad-79-eruption-of-vesuvius/FD54E5B954D8E86B9B59001C0B0CC0BB) (analysis)
13. [Science (AAAS), on the Herculaneum studies (2020): more than 300 dead in the stone chambers by the beach, found from the 1980s on](https://www.science.org/content/article/studies-reveal-gruesome-last-moments-pompeii-volcano-s-victims) (reporting)
14. [Parco Archeologico di Pompei, Orto dei Fuggiaschi: the thirteen victims of the Garden of the Fugitives, caught on about 3.5 m of accumulated pumice by the morning current](https://pompeiisites.org/sito_archeologico/orto-dei-fuggiaschi/) (primary)
15. [Pompeii Cast Project, Papers of the British School at Rome (2015): Fiorelli's plaster method from 1863 and the corpus of about 104 casts](https://resolve.cambridge.org/core/journals/papers-of-the-british-school-at-rome/article/inside-the-casts-of-the-pompeian-victims-results-from-the-first-season-of-the-pompeii-cast-project-in-2015/1F0C97208BF820BFAAF58C5BC3018A68) (secondary)
16. [Pilli and colleagues, Current Biology (2024): ancient DNA from the casts; the adult with the golden bracelet holding a child was an unrelated male](https://www.cell.com/current-biology/fulltext/S0960-9822(24)01361-7) (primary)
17. [Parco Archeologico di Pompei, press release (19 October 2018): the charcoal inscription of Regio V reading the 16th day before the Kalends of November, 17 October](https://pompeiisites.org/en/comunicati/nuova-interpretazione-su-iscrizione-a-carboncino/) (primary)
18. [CNR press release on Doronzo and colleagues, Earth-Science Reviews 231 (2022): the autumn synthesis; the most accredited date now 24 to 25 October](https://www.cnr.it/en/press-release/11206/vesuvius-revealing-ancient-mysteries-of-the-79-d-c-eruption) (primary)
19. [Parco Archeologico di Pompei, e-journal (December 2024), La data della distruzione di Pompei: the park's own case that the manuscripts still support 24 August and the question remains open](https://pompeiisites.org/e-journal-degli-scavi-di-pompei/la-data-della-distruzione-di-pompei-premesse-per-un-dibattito-aperto/) (primary)
20. [Encyclopaedia Britannica, Pompeii: a town of 10 000 to 20 000 people, the earthquake of 62, burial under 4 to 6 m of ash and pumice, excavations from 1748](https://www.britannica.com/place/Pompeii) (secondary)
21. [Encyclopaedia Britannica, Herculaneum: the town's burial under some 20 m of volcanic material, excavations from 1738](https://www.britannica.com/place/Herculaneum) (secondary)
22. [National Geographic, on the unexcavated third of Pompeii: about 22 of 66 hectares deliberately left buried](https://www.nationalgeographic.com/premium/article/pompeii-unexcavated-remains-archaeology-undug) (reporting)
23. [INGV, Osservatorio Vesuviano: the world's oldest volcano observatory, founded 1841, now the Naples section of INGV](https://www.ingv.it/en/stampa-urp/ufficio-stampa/note-stampa/osservatorio-vesuviano-il-museo-del-primo-osservatorio-vulcanologico-del-mondo) (primary)
24. [Dipartimento della Protezione Civile, the national plan for Vesuvius: the red zone of 25 municipalities and about 670 000 people, the 72-hour evacuation framework](https://www.protezionecivile.gov.it/it/approfondimento/aggiornamento-del-piano-nazionale-di-protezione-civile-il-vesuvio/) (primary)
25. [EARTH Magazine, Benchmarks: March 17, 1944, the most recent eruption of Vesuvius: the lava through San Sebastiano, 26 dead, the Allied occupation](https://www.earthmagazine.org/article/benchmarks-march-17-1944-most-recent-eruption-mount-vesuvius/) (secondary)
26. [The Aviation Geek Club, veterans' accounts of the 1944 eruption at Pompeii Airfield: the ash-wrecked B-25s of the 340th Bombardment Group (counts vary, about 80)](https://theaviationgeekclub.com/usaaf-personnel-recall-the-mount-vesuvius-volcanic-eruption-that-destroyed-88-b-25-bombers/) (reporting)
27. [ScienceDaily, on INGV-related research (2022): the current repose as the longest in centuries, the closed-conduit state of the volcano, the reservoir at about 6 to 8 km depth and the accumulation of magma during long quiescence](https://www.sciencedaily.com/releases/2022/01/220120125422.htm) (secondary)
28. [Volcano World, Oregon State University, Vesuvius: about 4 cubic kilometres erupted in about 19 hours; the column at times about 32 km](https://volcano.oregonstate.edu/vesuvius) (secondary)
29. [Giorgio Sommer, Plaster casts of bodies, Pompeii (about 1875), The Metropolitan Museum of Art, CC0: the casts photograph](https://commons.wikimedia.org/wiki/File:-Plaster_Casts_of_Bodies,_Pompeii-_MET_DP262064.jpg) (archival copy)
30. [Giorgio Sommer, Cast of a dog killed by the eruption of Mount Vesuvius, Pompeii, The J. Paul Getty Museum via Google Art Project, public domain: the dog photograph](https://commons.wikimedia.org/wiki/File:Giorgio_Sommer_(Italian,_born_Germany_-_(Cast_of_a_Dog_Killed_by_the_Eruption_of_Mount_Vesuvius,_Pompeii)_-_Google_Art_Project.jpg) (archival copy)
31. [Pierre-Jacques Volaire, The Eruption of Vesuvius (1771), Art Institute of Chicago, CC0: the painting](https://www.artic.edu/artworks/152672/the-eruption-of-vesuvius) (archival copy)
32. [United News newsreel No. 99 (US Office of War Information, 1944): the eruption of Vesuvius and the lava at San Sebastiano; National Archives 208-UN-99, listed unrestricted: the film clip](https://archive.org/details/gov.archives.arc.39006) (archival copy)
33. [Parco Archeologico di Pompei, A Guide to the Pompeii Excavations: city plan, Forum and individual monuments used as architectural references](https://pompeiisites.org/wp-content/uploads/A-Guide-to-the-Pompeii-Excavations-2.pdf) (primary)
34. [INGV / Osservatorio Vesuviano, eruption history: the changing Somma-Vesuvius edifice](https://www.ov.ingv.it/index.php/monitoraggio-sismico-e-vulcanico/vesuvio/vesuvio-storia-eruttiva) (primary)

Times of day are modelled reconstructions, not records: the whole clock of this story hangs on two moments in Pliny the Younger's letters (the cloud sighted about the seventh hour of day one; the tremors and flight at daybreak of day two), and the hours between follow the reconstruction of Sigurdsson and Carey (1985) as carried into current work (Sparice and colleagues, 2024, with Pompeii park co-authors), which is why every hour is written with about. The onset is given as shortly after noon to about 1 p.m.; the current that reached Pompeii is placed about 7 a.m. by Sigurdsson (1985) and from 8 a.m. by Sparice (2024); this story says about 07:00 and treats the difference as the uncertainty it is. The eighteen hours of the title span the fall's onset to the morning currents; the literature also gives about 19 hours for the whole eruption. The six currents follow Sigurdsson and Carey's numbering (S1 to S6); Italian stratigraphy divides the same deposits differently (EU units). The column's 32 km is Carey and Sigurdsson (1987); the paper is paywalled and the figure is taken from its abstract and citing literature. Strabo's reading of the summit as old, quenched fire is Geography 5.4.8; ancient recognition that the mountain had once burned is a different thing from foreknowledge of the eruption, and the story keeps the two apart. Letter 6.20 places the boy's reading of Livy before the flight from Misenum, during the tremors, and the night after the family's return as an anxious wait for news of his uncle; the story follows that order. Pliny's pinus is the Mediterranean umbrella pine; the public-domain Firth translation (1900) says pine-tree, and the quotations here are Firth's wording exactly, from attalus.org, whose page notes a few modified words; the Latin is unaffected. Pliny the Younger's age (seventeen) is his own statement in letter 6.20 that he was in his eighteenth year. Misenum's distance is rounded to 30 km following the volcanological literature. Roof collapse at 40 to 60 cm and the average fall rate of 15 cm an hour are Sparice (2024) after Sigurdsson (1985) and Luongo (2003); the fall was episodic, so the bury instrument's hours between published depths are a smooth reconstruction and say so. The body counts are Luongo and colleagues (2003): 1 044 recognisable bodies plus about 100 individuals from scattered bone, 394 in the fall layer; the true toll is unknown, since only about two-thirds of the town is excavated and many died outside the walls. Temperatures are a live dispute presented as one: about 250 to 300 °C at Pompeii (Mastrolorenzo and Petrone, 2010), about 500 °C and above at Herculaneum (Petrone 2020, Pensa 2023, Giordano 2025), under about 400 °C in the boat chambers (Martyn and colleagues, 2020, who also question heat as the sole killer); later work cited there argues asphyxiation for some Pompeii deaths. The vitrified brain was reported in 2020 (Petrone and colleagues, NEJM); its formation conditions, above about 510 °C with very fast cooling, are Giordano and colleagues (2025), and the story dates the two findings separately. The eruption's own earthquakes and the two men crushed by a falling wall are Sparice and colleagues (2024); seismic shaking does not explain every collapse and the story does not say it does. Herculaneum's dead by the shore number more than 300 (Science, on excavations from the 1980s on); about 340 is also published. The date: the manuscripts of Pliny give 24 August; the charcoal inscription of 2018 reads XVI K Nov, 17 October, with no year and an unknown writer; the CNR-INGV synthesis (2022) concludes autumn, most likely 24 to 25 October; the park's own journal (2024) holds the day open, and so does this story, whose chapters therefore say day one and day two. The 1944 aircraft count varies between about 78 and 88 in published accounts and is written as some 80. The red zone figure is the civil protection plan's about 670 000; about 700 000 also circulates. The plan's 72 hours are the planned duration of the red zone's evacuation once it is ordered, not a promised interval of warning before an eruption. The Volaire painting shows the eruption of 1771, not of 79, and is captioned as such. Photographs and the painting are public domain or CC0, unaltered except for size. The 1944 film clip is sixteen seconds of United News newsreel No. 99, a US government production held by the National Archives as unrestricted, cropped and muted, otherwise unaltered. Visual reconstruction: city blocks and architectural types are simplified from archaeological references, not surveyed building-by-building. Intact roofs and upper storeys are inferred. The summit is an interpretive filled profile over a modern DEM, not a recovered pre-79 surface; the regional coast is a modern geographic reference. Currents and the fleet route are schematic reconstructions, not fluid simulations or recorded tracks. Regional and architectural dimensions use 4.4 kilometres per scene unit. The cast diagram and inscription transcription are explanatory drawings, not archival images.

*Imagery: Giorgio Sommer (The Met, Getty), Pierre-Jacques Volaire (Art Institute of Chicago), US Navy: public domain and CC0*

*Eyewitness: Pliny the Younger, Letters 6.16 and 6.20, translated by J. B. Firth (1900), public domain*

*Terrain: NASA SRTM elevation of the Bay of Naples (AWS Terrain Tiles), public domain*

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*Pompeii is an Awescroll, a true story built as a single scroll. Read it as it was made: https://awescroll.com/002-pompeii. This text edition is for reading, quoting and indexing; please credit Awescroll and link the story.*