Athens, Safar 16, 1440, Oct 25, 2018, SPA -- A strong earthquake struck in the Ionian Sea off Greece. The magnitude-6.8 quake struck underwater near the tourist island of Zakynthos at a depth of 16.6 kilometres, according to the US Geological Survey. The quake was felt across Greece with many people jolted awake. There were no immediate reports of damage. --SPA 03:14 LOCAL TIME 00:14 GMT 0047 www.spa.gov.sa/w776077