Overview

• A magnitude 4.6 quake on June 30 at 12:47 UTC struck near Bacoli with an epicenter about 5 kilometers offshore at a depth of roughly 5 kilometers, marking the largest tremor recorded in Campi Flegrei alongside the March event.
• Four minutes later, a 2.2 magnitude aftershock struck the area, continuing the intense seismic swarm beneath the caldera.
• The tremors caused a 15-meter-wide rockfall on Pennata island but did not result in any reported injuries or major structural damage.
• Municipal authorities and volunteer teams activated emergency protocols, established gathering points and keep a close watch under the region’s long-standing yellow alert.
• Scientists at the Italian Institute for Geophysics and Volcanology caution that rising subsurface pressure could trigger stronger earthquakes or volcanic unrest in the coming weeks.