Main activity
Pliniana, stromboliana, effusiva
Beginning of eruptive activity
< 39.000 years
Last eruption
Activity status
Sequence of lava and scoriae exposed along the internal slope of the caldera of Mount Somma.
The Somma-Vesuvius complex seen from Naples
The volcanic complex of Somma-Vesuvius covers an area of about 150 km2 and has a maximum height of 1281 m a. s. l. It is composed of an older building, the Somma, characterized by a summit caldera formed in several phases, and the more recent Vesuvius, increased within the caldera. The volcanic complex is less than 39,000 years old and has completed the first phase of its activity, dominated by lava flows and low-energy explosions, about 20,000 years ago.
Afterwards the volcano generated 4 Plinian eruptions, preceded by long periods of dormancy, and about 10 explosive events of lower energy. The last Plinian event is the eruption of 79 A.D., which once again modified the caldera of the Somma, within which the recent cone was formed, with the alternation of periods of persistent Strombolian activity and effusive activity. In historical times, the most energetic events were the subplinian eruptions of Pollena (472 A.D.) and of 1631. Vesuvius was characterized by open conduit and obstructed conduit phases.
The first ones were dominated by frequent, explosive-effusive, low-energy eruptions. This type of activity characterized the volcano in the last period, between 1631 and 1944, the date of the last eruption. The phases with obstructed conduits, like the present one, are characterized by the total absence of eruptive activity. During these periods, which in the past have had a very variable duration, the magmatic system is fed again. These periods ended with explosive eruptions of high energy Lavas
Cratere 1944
The crater left by the 1944 eruption.
lave 1944
Lavas from the 1944 eruption
The eruption of March 18, 1944 lasted about 10 days, generated lava flows that partially destroyed the villages of Massa di Somma and San Sebastiano al Vesuvio, and explosions that generated deposits of ash and lapilli, spread over a large area, east and south of the volcano.
esplosione 1944
Explosive phase of the 1944 eruption
Quarry of Traianello (Somma Vesuviana) Sequence of deposits of Plinian eruptions of Vesuvius (in red) and Phlegraean Fields (in green), separated by paleosoils and erosion surfaces.
The geology of the volcano seen through the geological map and some characteristic and very interesting sites
Oplonti (Torre Annunziata) - Sequence of deposits from the 79 A.D. eruption.
cava ranieri
Locality Cava Ranieri (Terzigno). Overlapping of recent lava flows and pyroclasts of Plinian eruptions
palma campania
Locality Palma Campania Pyroclastic sequence from Plinian eruptions of Vesuvius and paleosoils in a quarry east of Vesuvius