Experimental phase equilibria carried out on material from four main explosive events at Vesuvius are used to show that the reservoirs that fed the eruptive activity migrated from 7–8 km to 3–4 km depth between the 79 AD (Pompei) and 472 AD (Pollena) events. If data from the 18.5 kyr-old Pomici di Base event and the 1944 Vesuvius eruption are included, the total upward migration of the reservoir amounts up to 9–11 km. Reservoir migration, and the possible influence on feeding rates, should accordingly be integrated into the parameters used for defining expected eruptive scenarios at Vesuvius.
- B. Scaillet
- M. Pichavant
- R. Cioni