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Mount Vesuvius - Volcanic time bomb in the Gulf of Naples

Vesuvius is a somma volcano located just 9 km east of Naples. The volcano dominates the Gulf of Naples. It is reaching a height of 1281 m. Vesuvius is the most prominent volcano of several volcanoes in this area. Together they formed the Campanian volcanic arc.

The recent pyroclastic cone of Mount Vesuvius was grown within a large caldera of the Monte Somma. So the volcano has got two summits. The caldera wall of Monte Somma channeled lava flows and pyroclastic flows to the south and west.

Stromboli pictures

Stromboli
Stromboli
Stromboli

Vesuvius consists mainly of phonolite. This is a highly viscous lava style with a large explosive potential. The volcano is famous for its destructive plinian eruptions and is one of the most dangerous volcanoes worldwide because the Gulf of Naples is a densely populated area. Here live about 3000000 people in the neighborhood of active volcanoes.

In the last 17000 years eight mayor explosive eruptions have taken place. The best known eruption of Vesuvius took place on 24th August 79. This powerful eruption led to destruction of the roman cities of Pompeii, Herculaneum and Stabiae. Volcanic ashes rose up to a height of 33 km. The collapse of the ash cloud generated pyroclastic flows which burried the cities under a thick layer of volcanic deposits. An estimated 16000 people died in this natural disaster.

The largest eruption since 79 CE was the one of 1631. Pyroclastic flows devastated great areas and reached as far as the coast. The last eruption of Mount Vesuvius was in 1944. Lava flows destroyed the village of Massa on the volcano's flank. Since then, rests the volcano. Its current crater has a diameter of 500 m and 300 m deep.

The media speculated repeatedly about an imminent volcanic eruption of Vesuvius. But scientists see no evidence of an imminent volcanic eruption. They fear rather an eruption of Campi Flegrei. This large caldera-volcano lies few kilometers west of Naples and is the most dangerous volcano in Europe.

The magma reservoire below Vesuvius

According to new research results, not the entire magma chamber rose, but only the magma. Under Vesuvius there should be at least 2 magma reservoirs in different depths. The lowest lies at a depth of 11-15 km. The shallower one in 5-6 km depth. Some studies also mention magma, which comes from a depth of 7-8 kilometers. The volcanologists seem to come to partly quite different results. It seems clear, however, that the magma of the Plinian eruptions came from the lower floors of the magma reservoirs, while the magma of the eruption phases between 1631-1944 came from flatter regions.

Facts

map

Location: 40.821 N, 14.42 E, Italy
Altitude: 1281 m
Form: Sommavolcano
Petrography: Phonolite, Basalt
Volcanic activity: Plinian, vulcanian, pf, lava flow

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» Pompeii

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