Overview
- The strongest shock was revised to magnitude 5.5 by the Istituto Nazionale di Geofisica e Vulcanologia after striking offshore near the Aeolian Islands at about 9 kilometers depth on Friday, Oct. 23, 2026.
- The event came during an intense seismic swarm of at least a dozen to two dozen shocks that began earlier that morning and continued with multiple aftershocks in the hours that followed.
- An orange tsunami alert was issued immediately and closed about an hour later after monitoring showed no measurable change in sea level.
- Local authorities ordered precautionary evacuations of schools and public buildings in Palermo, Trapani and the Aeolian islands and dispatched Carabinieri and civil protection teams to check vulnerable structures; no major damage or casualties were confirmed in initial reports.
- Experts say the shallow, offshore location explains why shaking was strongly felt on nearby islands and coastal towns and they urged continued monitoring and targeted inspections of older schools, hospitals and critical infrastructure as the sequence evolves.