A volcano in the south of Italy could be coming closer to erupting, putting the lives of more than half a million people in danger, an article from Nature Communications has warned.

Scientists believe that magma at the Campi Flegrei volcano in Naples is reaching a level designated by "critical degassing pressure" (CDP). This is characterized by sudden release of water-rich gases in vast volumes, which could lead to rock failure and explosion of the volcano, the report, released late last month, said.