The European Earthquake Monitoring Centre recorded the quake's epicentre at 22 km northwest of the Greek capital city.
Reuters reported that people were running from buildings in panic while high rise towers had been evacuated.
This is believed to be the first earthquake to hit Athens since the deadly one in 1999 - which left 143 people dead, 700 injured and 70,000 buildings damaged.
There were no immediate reports of injuries or damage and reports say the tremors did not last long.
Thousands of Australians without power as cyclone Alfred hits
Hundreds of thousands of people in Australia's Queensland state were without power on Sunday after Alfred, a downgraded tropical cyclone, brought damaging winds and heavy rains, sparking flood warnings.
Israeli airstrike kills two in southern Gaza
An Israeli airstrike killed two Palestinians in Rafah in the southern Gaza Strip on Saturday, medical sources said, as mediators pushed ahead with talks to extend a shaky 42-day ceasefire agreed in January between Israel and Hamas.
12 people injured in Toronto pub shooting
Toronto Police said early on Saturday they were searching for three male suspects in a shooting that injured at least 12 people at a pub in the Canadian city.
Cyclone Alfred downgraded as millions stay indoors
Ex-tropical cyclone Alfred lingered off the south-east Australian coast on Saturday and forecasters said Brisbane is likely to miss the worst of the storm, a relief for millions of residents in the region who have been staying indoors.
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