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.
Trump says Iran should wave the white flag of surrender
US President Donald Trump on Tuesday dismissed Iran's military capability and said Tehran "should wave the white flag of surrender" but is too proud to do so.
Pentagon chief says ceasefire with Iran is not over
US Defence Secretary Pete Hegseth said on Tuesday that the ceasefire with Iran was not over, even as the US and Iran exchanged fire in the Gulf as they wrestled for control of the Strait of Hormuz.
US and Iran launch new attacks as they wrestle for control of Strait
The US military said on Monday it destroyed six Iranian small boats and intercepted Iranian cruise missiles and drones as Tehran sought to thwart a new US naval effort to open shipping through the Strait of Hormuz.
Israeli strikes kill two Palestinians in Gaza, medics say
Israeli strikes killed at least two Palestinians and wounded several others in the Gaza Strip on Tuesday, health officials said.
Blast at fireworks factory in China's Hunan kills 26, Xi calls for probe
A blast at a fireworks factory in China has killed at least 26 people and injured 61, flattening buildings and sending towering clouds of smoke into the sky, and prompting President Xi Jinping to order a thorough investigation, state media reported on Tuesday.
