Naples, Italy — As the ground beneath Italy’s Phlegraean Fields begins to rumble and rise, residents and scientists alike are increasingly concerned that Europe’s most dangerous volcano may be reawakening.
Situated near Naples, this vast volcanic region has experienced months of unrest, with thousands of small earthquakes shaking the area and ground levels steadily rising.
Experts are divided on how severe the threat is, but for the 80,000 people living in the shadow of the Phlegraean Fields, fear is growing.
Volcanic Awakening and Earthquake Swarms
The Phlegraean Fields, also known as Campi Flegrei, is a sprawling volcanic area filled with craters, fumaroles, and hot springs.
It is part of the larger Campanian volcanic arc, which includes the infamous Mount Vesuvius. While Vesuvius has been quiet since 1944, the Phlegraean Fields have been showing increasing signs of activity.
The ground in this area is rising at an alarming rate of two centimeters each month, a phenomenon known as “bradyseism,” which occurs when magma or volcanic gases cause the ground to swell.
The recent earthquake activity has only heightened concerns. Over the past several months, thousands of small tremors have rocked the region, the strongest of which reached a magnitude of 4.4 in May.
That quake forced the evacuation of schools, a prison, and more than 100 families. Coastal communities, including the city of Pozzuoli, have been particularly affected, with some residents temporarily leaving their homes due to the tremors.
Despite these disruptions, many locals continue with their daily routines—cooking meals, playing soccer, and enjoying the scenic views of Capri and Ischia.
Yet the tension is palpable. Residents have grown increasingly anxious as buildings, even those strengthened after similar seismic activity in the 1980s, begin to crack under the strain.
Local businesses have also suffered, with tourism in decline as visitors shy away from the potentially hazardous region.
Scientific Debate and Warnings
The question of how dangerous a potential eruption could be remains a topic of heated debate among scientists. Giuseppe Mastrolorenzo, a senior researcher at Italy’s National Institute of Geophysics and Volcanology, has been one of the most vocal advocates for increased caution.
Mastrolorenzo believes that pressure beneath the Phlegraean Fields is building and could be released suddenly in a catastrophic eruption. Such an event, he warns, could send volcanic ash and dangerous gases over Naples, threatening the lives of thousands.
Mastrolorenzo’s warnings have prompted some experts to call for evacuation plans to be put in place, despite the absence of clear signs that magma is moving rapidly toward the surface.
He points to the region’s history, noting that the last major eruption in 1538 created Monte Nuovo, a volcanic cone that formed in just a few days.
While that eruption allowed residents time to flee, Mastrolorenzo warns that future eruptions may not offer the same window of opportunity.
“Given the current rate of ground uplift and the increasing seismicity, we cannot afford to be complacent,” Mastrolorenzo said in a recent interview. “We need to start considering evacuations now, before the situation escalates.”
A Divided Response
Despite Mastrolorenzo’s warnings, not everyone shares his sense of urgency. Pozzuoli’s Mayor, Luigi Manzoni, has criticized what he sees as alarmist rhetoric.
While Manzoni acknowledges that the volcanic threat is real, he believes it is manageable and that widespread evacuations would be premature.
Instead, local authorities are focused on reinforcing buildings and improving infrastructure to mitigate the impact of potential earthquakes.
“We have lived with this volcano for centuries,” Manzoni said in a public statement. “We know how to deal with it. We will continue to monitor the situation closely, but there is no need to panic.”
The national government has also sent mixed signals. On one hand, they have imposed a temporary ban on new construction in the most vulnerable areas, a move aimed at preventing further risk to lives and property.
On the other hand, the government has greenlit a major redevelopment project in the region, a decision that has left some residents puzzled.
Local citizen groups have accused officials of downplaying the threat to protect the economy, particularly the region’s vital tourism sector. They are calling for more transparent communication from the government and a stronger focus on public safety.
“We feel like we’re being left in the dark,” said Maria Russo, a spokesperson for a local community organization. “The government says they’re monitoring the situation, but we need more than just words. We need action.”
Historical Context and Future Risks
The Phlegraean Fields have a long and dramatic history. The last eruption in 1538, which created the Monte Nuovo crater, is one of several major volcanic events in the area over the centuries.
The region’s volcanic activity dates back more than 39,000 years, to an eruption that was one of the largest in European history.
That ancient eruption is believed to have contributed to the extinction of the Neanderthals and reshaped the landscape of southern Italy.
While there are currently no clear indications that an eruption on such a massive scale is imminent, the situation remains unpredictable.
Some experts believe that residents would have days or even weeks to evacuate if an eruption were to occur, similar to the lead-up to the 1538 eruption.
Others, however, caution that the Phlegraean Fields’ complex volcanic system could trigger an eruption with little warning, leaving the densely populated area with limited time to escape.
In the meantime, recent earthquakes have already caused tangible damage in the region. Buildings that were retrofitted after the last major period of bradyseism in the 1980s are once again showing signs of stress.
Cracks are appearing in walls, and some structures have become unsafe to inhabit. The psychological toll on residents is also growing, as the constant tremors and uncertainty take their toll.
Looking Ahead
For now, life continues in the Phlegraean Fields, but the looming threat of a volcanic eruption is never far from people’s minds.
As scientists continue to monitor the situation, residents are left to weigh the risks of staying against the difficulties of leaving their homes and livelihoods behind.
With experts divided on the likelihood and timing of an eruption, the region remains in a state of uneasy anticipation. As one resident, Giovanni Esposito, put it: “We’re living on a ticking time bomb. We just don’t know when—or if—it will go off.”