Strong 4.7-Magnitude Tremor Rocks Volcanic Campi Flegrei Near Naples

Volcanic Swarm Triggers Landslides and Evacuations

In the late evening of Friday, July 31, 2026, a strong 4.7-magnitude earthquake struck the Campi Flegrei volcanic region near Naples, Italy, causing widespread concern across southern Europe. The seismic event, occurring at a shallow depth of just 3 km, was identified as the most powerful tremor to hit the volcanically active caldera zone in the past forty years. It triggered landslides along coastal cliffs, caused power outages, and damaged key municipal infrastructure, including Pozzuoli’s main harbor pier.

Civil Protection Response

At least 26 injuries were officially documented, with five individuals hospitalized and approximately 300 residents evacuated from Pozzuoli. Following the primary shock, Italy’s National Institute of Geophysics and Volcanology (INGV) registered over 60 subsequent tremors, maintaining high alert. Civil Protection Minister Nello Musumeci urged caution, warning that the seismic swarm remained highly active and structural assessments of historic masonry buildings would continue throughout the week.