In 2023, the Phlegraean Fields volcanic activity (Italy) caused 6,066 earthquakes, and this number increased to 6,740 in 2024.
Photojournalist Alessandro Gandolfi captured images of the Phlegraean Fields (also known as Campi Flegrei) volcanic area in southern Italy, which recorded a record 6,740 earthquakes in 2024 and has not yet “quieted” in 2025. Pictured: Solfatara crater in the Phlegraean Fields volcanic area. (Photo: Alessandro Gandolfi)
The volcanic area, which has been active for more than 80,000 years, is home to more than 600,000 people. The massive volcano, with a nearly 13km-wide crater that is almost submerged in the Bay of Naples, is larger than nearby Mount Vesuvius. Pictured: The residential area of the Cigliano meteorite crater in the heart of the Phlegraean Fields. (Photo: Alessandro Gandolfi)
Vesuvius is the volcano that caused one of the most devastating eruptions in human history when it destroyed the nearby city of Popeii in 79 AD. Pictured: A group of teenagers look at the summit of Vesuvius from Mount Somma, the original part of the Vesuvius volcano. (Photo: Alessandro Gandolfi)
Pompeii, the Roman city buried by the eruption of Mount Vesuvius in 79 AD. Buildings show signs of damage from a powerful earthquake that struck 17 years earlier. (Photo: Alessandro Gandolfi)
Like the Phlegraean Fields, the Vesuvius volcano area has many hot spring systems that people take advantage of. Pictured: The hot spring pool at the Terme Vesuviana spa in Naples. The mineral springs connected to the Vesuvius volcano have been exploited since Roman times, bringing health benefits to the people. (Photo: Alessandro Gandolfi)
The last major eruption of the Phlegraean supervolcano took place in 1538, forming a new bay on the southern coast of Italy. It had been dormant since 1980, but became active again in 2016. Pictured: Buildings in Monterusciello, built in the late 1980s after severe earthquakes. At that time, the residents of Rione Terra – the historic center of Pozzuoli, part of the Phlegraean Fields volcanic area – were forced to evacuate. (Photo: Alessandro Gandolfi)
According to some volcanologists, the Italian National Institute of Geophysics and Volcanology (INGV) has recorded increased seismic activity in the area since 2022, possibly due to magma accumulating under the surface or gas accumulation. Pictured: The Monte Nuovo crater appeared during an eruption on September 29, 1538, the most recent in the Phlegraean Fields. (Photo: Alessandro Gandolfi)
Earthquakes continue to be recorded here almost every day. In 2023, 6,066 earthquakes occurred, and this number increased to 6,740 in 2024. In this photo: Peaceful daily life continues in the Phlegraean Fields volcano. (Photo: Alessandro Gandolfi)
Still “active” in 2025, the Phlegraean volcano causes anxiety and fear for the people here. They even have to sleep in cars or outdoors to… escape. In the photo: The ruins of the Serapis (or Macellum) temple in a Roman market. (Photo: Alessandro Gandolfi)
In early March 2025, the strongest earthquake in 40 years shook buildings in Naples, located in the volcanic region. Pictured: Tourists tour underground Naples, where a network of tunnels, aqueducts and passageways are carved deep into the volcanic rock. (Photo: Alessandro Gandolfi)
On May 20, 2024, a magnitude 4.4 earthquake with a focal depth of 3 km was recorded here, just 1 hour after another magnitude 3.5 earthquake. The earthquakes were part of an ongoing “seismic storm” that had already brought more than 10 magnitude 2 tremors in the previous 48 hours. In the photo: People dance, sing and play traditional instruments on the top of Mount Somma, where an annual peace-praying ritual is held. (Photo: Alessandro Gandolfi)
Living right in the area of an active volcano, the residents here are always ready to participate in evacuation drills. Pictured: A simulated evacuation exercise in the event of a volcanic eruption in the Phlegraean Fields. Angelo Di Roberto, 70, his 12-year-old grandson and Alessandro Celardo, 29, from Monterusciello to Naples Central Station, where they will depart for Milan. in case of an eruption. (Photo: Alessandro Gandolfi)
The Phlegraean Fields are one of the most closely monitored volcanoes in the world. Geologists regularly monitor the volcanoes for safety warnings. Geologists Antonio Caradente and Rosario Avino monitor activity in the Pisciarelli area of the Phlegraean Fields. (Photo: Alessandro Gandolfi)
At the foot of the volcano, INGV researchers conduct electrical impedance tomography to verify and search for possible movements of magma. (Photo: Alessandro Gandolfi)
Mauro Di Vito (left), director of the Vesuvius Observatory, and colleagues work in the monitoring room, which synthesizes signals collected from the volcanoes Vesuvius, Phlegraean Fields, Ischia and Stromboli. (Photo: Alessandro Gandolfi)
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