Relocated earthquake catalog spanning 4 months (January-April 2024) during the swarm-like seismic excitation that occured in the offshore area north of Kefalonia island in the Central Ionian Islands, Greece. Events were detected and picked using Phasenet (Zhu and Beroza, 2018), located using Hypoinverse (Klein, 2002) and relocated with HypoDD (Waldhauser and Ellsworth, 2000). Dataset also contains computed focal mechanisms for specific events.