The shock in the Peloponnese due to the Ionian-Greece compression - Earth and Poles. Data from the INGV Operations Room in Rome indicate that the quake occurred at a depth of 33 km, with an epicenter approximately 40 km from the Greek coast.
Among the closest cities is Pyrgos, the island of Zakynthos to the north-west. There is no apparent link with a magnitude 3.8 shock recorded in the morning in southern Bulgaria, located by regional sources 57 km from Plovdiv.