4.7-magnitude earthquake near Naples injures 21, including 2 critically

Herz — World Desk · 1 August 2026 at 11:08 · 30s summary · 2 min read

What we know

A 4.7-magnitude earthquake struck the Naples region in southern Italy on Friday, July 31, in the evening, according to Le Monde. It injured 21 people, including 2 critically, and caused material damage.

Dozens of lower-intensity aftershocks shook the area throughout the night.

Context: A volcanic region under continuous surveillance

The Naples region borders the Phlegraean Fields (Campi Flegrei), an active volcanic caldera west of the city. This sector experiences bradyseism—a phenomenon of slow ground deformation (subsidence or uplift) linked to magmatic or hydrothermal activity at depth—which is accompanied by recurrent seismic swarms.

The National Institute of Geophysics and Volcanology (INGV), Italy's seismic and volcanic monitoring agency, monitors the area continuously. Since 2023, Italian authorities have maintained a yellow alert level (allerta gialla) and report hundreds of tremors per month, as well as continuous ground uplift.

Timeline of seismic activity in the Naples area

1. 1982-1984
   Major bradysismic crisis at the Phlegraean Fields: ground lifts approximately 1.8 meters at Pozzuoli, prompting the evacuation of roughly 40,000 residents.
2. September 2023
   A 4.2-magnitude earthquake strikes the Phlegraean Fields—the strongest recorded in the area in decades—triggering panic and partial evacuations.
3. 2023-2025
   Persistent seismic and bradysismic crisis: hundreds of tremors per month, continuous ground uplift, yellow alert level maintained by authorities.
4. July 31, 2026
   4.7-magnitude earthquake in the Naples region: 21 injured including 2 critically, material damage, dozens of aftershocks during the night.