vesuvius eruption lasted for 24 hours.
The eruption in 79 AD was 4 days long before the final eruption which was a cloud of lava, pumice, and ash. It buried Herculaneum under 43 feet of boiling mud while Pompeii was buried under 16 feet...
11 hours
it lasted a whole day covering the graound in tons of ash and lava.
The eruption of Mt Vesuvius lasted aprox. 2 days.