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Magnitude 4.6 Quake Shakes Campi Flegrei Caldera, Disrupts Rail Services

Experts report persistent bradyseism without magma ascent fueling the June 30 tremor.

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Overview

  • The earthquake struck at 12:47 UTC on June 30 near Bacoli by the Aragonese Castle of Baia at a depth of 5 km, marking the strongest shock in Campi Flegrei since 1983.
  • No casualties or major structural damage were reported, but safety protocols halted train circulation at the Naples railway node.
  • A limestone ridge collapsed on Pennata Island in Bacoli during the quake, with no injuries reported due to lower weekday visitor numbers.
  • INGV’s Osservatorio Vesuviano confirms ongoing ground uplift of about 15 mm per month generating periodic seismic swarms without evidence of magma rising.
  • Mayor Josi Della Ragione has called for accelerated coastal consolidation works and warned that the planned €10 million budget will be insufficient for adequate defenses.