Seismic swarm at the Campi Flegrei: different shocks between Pozzuoli and the Gulf, with magnitude up to 4.4. Fear among the residents, monitoring in progress.
From 12:06 on 13 May 2025 it is A seismic swarm in the field of Campi Flegrei is underway. According to the Ingv – Vesuvian Observatory, eight earthquakes had already been detected at 12:45. The strongest, recorded at 12:07, reached one magnitude of 4.4followed at 12:22 from a magnitude of 3.5. The map provided by the Ingv shows the epicenter of the events with a magnitude greater than 1.
The article continues after the infographic below
The danger is not imminent. The weekly bulletin of the Vesuvian Observatory, updated between April 28 and May 4, 2025, indicates that 43 earthquakes had been identified in the week preceding the current swarm, with maximum magnitude MD 1.4. The lifting speed of the soil showed a slowdown, attesting to average values of 15 ± 5 mm/month. No significant variation has been observed in the geochemical parameters, although a phenomenon of heating and increased pressure in the hydrothermal system persists, in particular in the Pisciarelli area, where the smoke temperature reached on average 97 ° C.
Experts, albeit excluding to date scenarios of imminent eruptionmaintain constant monitoring of the situation, fundamental to support any civil protection decisions.
Bradyseism. The seismic activity was recorded in a context of growing attention to the Phlegraean area, where for months there has been an increase in bradisism and seismicity. Just in recent days, the Ingv researchers have published a study that identifies in the earth’s crust, at a depth of about 3-4 kilometers, a weakened layer that would favor the accumulation of magmatic fluids, thus explaining the current landfill of the soil and frequent seismic swarms.
What is the risk area. The Flegrei Campi are an active volcanic area located west of Naples, among the municipalities of Pozzuoli, Bacoli, fourth and part of the Campania capital. Unlike Vesuvius, they represent a volcanic field, that is A set of eruptive centers collapsed in a large caldera. The area has been subject to the phenomenon of bradisism for centuries, a slow lifting and lowering of the soil, well documented starting from the 4th century AD
The episode of the Podcast Prisma dedicated to the Flegrei Campi
