According to Pliny the Younger, the eruption of Mount Vesuvius lasted for 18 hours. The city of Pompeii was covered in 14 to 17 feet of ash and pumice, while the nearby seacoast experienced significant changes. Herculaneum, on the other hand, was buried under more than 60 feet of mud and volcanic material.
In summary:
1. The eruption of Mount Vesuvius, as described by Pliny the Younger, lasted for 18 hours.
2. Pompeii was buried under 14 to 17 feet of ash and pumice.
3. The nearby seacoast was drastically altered due to the eruption.
4. Herculaneum was buried under more than 60 feet of mud and volcanic material.
Please let me know if there's anything else you would like to know