A magnitude 4.7 [1] earthquake struck the Phlegraean Fields volcanic area near Naples, Italy, on Friday, July 31, 2024 [1].

The event is significant because it occurred within the Campi Flegrei, an active volcanic region where tectonic movement can pose risks to the densely populated city of Naples.

Emergency reports said the quake injured at least 21 people [2]. Other reports said the number of injured reached dozens [3]. The tremor caused damage to several buildings [1] and triggered power outages across the affected region [1].

Local infrastructure faced immediate disruptions. Train and metro services were interrupted as authorities assessed the safety of the lines [1]. The earthquake was caused by tectonic movement within the active volcanic fields [2, 5].

While some reports indicate that multiple buildings collapsed, other accounts said that only some buildings were damaged [1]. There were also conflicting reports regarding secondary effects, with some sources citing landslides, while others focused on transport and power failures [1, 3].

Authorities in southern Italy continue to monitor the Phlegraean Fields for further seismic activity. The region's volcanic nature makes it susceptible to these types of tremors, which often result from the movement of magma or tectonic shifts beneath the surface [2, 5].

“A magnitude 4.7 earthquake struck the Phlegraean Fields volcanic area near Naples”

The seismic activity in the Campi Flegrei region highlights the ongoing geological instability of the Phlegraean Fields. Because this is an active volcanic caldera located near a major urban center, frequent earthquakes can signal shifting pressure levels underground, necessitating constant surveillance to mitigate risks to the civilian population of Naples.