NAPLES – At 8.28am the earth trembled again at the Campi Flegrei due to a 3.4 magnitude earthquake recorded by the INGV at a depth of 4 kilometres. Various reports on social media also for the presence of a strong smell of sulfur in the air from the early hours of the day. This latest manifestation of bradyseism occurring in the area was also felt by the citizens of the Phlegraean municipalities and in various neighborhoods of Naples.