The volcano is one of the few active super volcanoes in the world. This means it could potentially erupt at the highest level measured by the Volcanic Explosively Index. Camp Flegrei is an almost 13 kilometre wide volcanic crater, home to more than 1.5 million people.
Volcano hazard expert Dr Christopher Kilburn, a professor the University College London has warned Campi Flegrei is “active and will erupt again”.
But any eruption would be quite small and wouldn’t produce a caldera – a volcano that has collapsed on itself during a large-scale eruption.
He said to the Sunday Express: “There is now concern that the volcano might be getting ready for another eruption in the foreseeable future.
“But that type of eruption is one of the size of possibly a Vesuvian-style or even much smaller.
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“So we are not talking about another giant eruption that might produce another caldera.”
Dr Kilburn has studied the Campi Flegrei area at the Vesuvius Observatory in Naples in the past.
Mount Vesuvius is located around 30 kilometres to the east of Campi Flegrei and last erupted in 1944.
But the last major collapse at Campi Flegrei took place 15,500 years ago, so there Dr Kilburn is not too worried.
Dr Kilburn said: “Since then there have been lots of small eruptions within the caldera, which is populated by about 350,000 people.
“The ground has at the centre of the caldera, the ground has been uplifted overall by just under four metres in the last 60 years or so.
“So, about two metres in two years with long intervals and nothing in between.”
Dr Kilburn advised local people should not be concerned as long as they are “aware” the volcano is active.
He said: “It is important to be reassured that plans are being made and not to be worried every day that something might happen because that is actually not the case.”