According to the traditional date preserved in later manuscripts of Pliny the Younger's letters, Mount Vesuvius erupted on August 24, sending a column of ash and pumice miles into the sky before pyroclastic flows swept down the mountain. Pompeii and Herculaneum vanished beneath the debris, preserving them—and their inhabitants—in eerie detail for archaeologists to uncover seventeen centuries later.
Pliny the Younger, then seventeen, watched from across the Bay of Naples as a cloud shaped 'like an umbrella pine' rose over Vesuvius. His uncle, Pliny the Elder, sailed toward the disaster to rescue survivors and study the phenomenon; he died on the beach at Stabiae, likely suffocated by toxic fumes. The younger Pliny's letters to the historian Tacitus, written decades later, remain the only eyewitness account of the eruption to survive.
The city of Pompeii, a prosperous Roman resort of some 11,000 people, was smothered first by pumice rain and then by a series of pyroclastic surges—superheated gas and ash moving at highway speed. Herculaneum, closer to the volcano, was entombed by dense volcanic mud that carbonized wood and preserved even loaves of bread. Excavations beginning in the 18th century revealed plaster-cast voids of the dead, frozen mid-flight or curled in final embrace.
Modern volcanologists have long debated the traditional August date, since some carbonized fruit and clothing found at the sites suggest an autumn eruption instead. A charcoal inscription discovered in 2018, referencing a date in mid-October, has strengthened the case that Pliny's manuscripts may have been miscopied over the centuries.