A moderate quake measuring 5.4 on the Richter scale was recorded at roughly 10.36 (07.36 GMT), with an epicenter 57 southwest of the Ionian Sea island of Cephalonia.

Hellenic Air Force fighter jets co-trained with the USS Harry S. Truman aircraft carrier and the Spanish SPS Juan Carlos I aircraft carrier on May 23 and 24 in the Ionian Sea region.

In particular, four F-16s from Greece participated, four F-18s from the "USS Harry S. Truman" and two AV-8B Harriers from the "SPS Juan Carlos I" in air combat and interception of pursuit-bomber aircraft.

According to the Hellenic Armed Forces General Staff, the conduct of the co-training exercise aims at promoting the level of operational readiness, combat capability and cooperation of the participants in an allied context.

Of particular concern is the spread of purple jellyfish in the Greek seas, as according to the Hellenic Biodiversity Observatory "the movements of jellyfish we observed in winter have verified us and the spread of purple jellyfish in the Ionian Sea from the beginning of April is confirmed".