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4.7-Magnitude Earthquake Near Naples: 21 Injured, 2 Critically
Herz — World Desk · · 30s summary · 2 min read
The essentials
A 4.7-magnitude earthquake struck the Naples region in southern Italy on Friday evening, July 31, according to Le Monde. The quake injured 21 people, with 2 in critical condition, and caused material damage. Dozens of lower-intensity aftershocks shook the area throughout the night. The region borders the Campi Flegrei (Phlegrean Fields), an active volcanic caldera that has been under continuous seismic monitoring by Italian authorities due to persistent seismic activity in recent years.
- 4.7-magnitude earthquake struck the Naples region on Friday evening, July 31
- 21 people injured, with 2 in critical condition; material damage reported
- Dozens of lower-intensity aftershocks occurred throughout the night
- The region borders the Campi Flegrei, an active volcanic caldera under continuous monitoring
What happened
A 4.7-magnitude earthquake struck the Naples region in southern Italy on Friday evening, July 31, according to Le Monde. It injured 21 people, with 2 in critical condition, and caused material damage.
Dozens of lower-intensity aftershocks shook the area throughout the night.
Context: A volcanic region under continuous monitoring
The Naples region borders the Campi Flegrei (Phlegrean Fields), an active volcanic caldera west of the city. This sector is subject to bradyseism — a geological phenomenon involving slow ground deformation (uplift or subsidence) linked to magmatic or hydrothermal activity at depth — which is accompanied by recurrent seismic swarms.
The Istituto Nazionale di Geofisica e Vulcanologia (INGV), Italy's seismic and volcanic monitoring agency, continuously monitors the zone. Since 2023, Italian authorities have maintained a yellow alert level (allerta gialla) and report hundreds of tremors per month, along with continuous ground uplift.
Timeline of seismic activity in the Naples area
- 1982–1984Major bradyseismic crisis at the Campi Flegrei: the ground rises approximately 1.8 meters in Pozzuoli, and roughly 40,000 residents are evacuated.
- September 2023A 4.2-magnitude earthquake strikes the Campi Flegrei — the strongest recorded in the area for several decades — causing panic and partial evacuations.
- 2023–2025Persistent seismic and bradyseismic crisis: hundreds of tremors per month, continuous ground uplift, yellow alert level (allerta gialla) maintained by authorities.
- July 31, 20264.7-magnitude earthquake in the Naples region: 21 injured with 2 in critical condition, material damage, dozens of aftershocks during the night.
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