Fig. 1: Map of the Campi Flegrei (Italy) including the locations of the events (2020–2025) and stations belong to three networks of INGV (Istituto Nazionale di Geofisica e Vulcanologia), Italian Strong Motion Network (Rete Accelerometrica Nazionale—RAN), and ISNet (Irpinia Seismic Network).
From: Earthquake rupture velocity and stress drop interaction in the Campi Flegrei volcanic caldera

The simplified caldera boundaries79 are shown with black solid lines. Main ground uplift phenomena, up to 1.8 m in the period 2014–2024, are measured at the town of Pozzuoli where most epicenters are located.