The biggest of the tremors to hit Istanbul was felt some 275 miles away (440km) in the capital, Ankara, according to Mayor Mansur Yavas. It's a measure of how powerful the 6.2-magnitude quake was. Officials from the Istanbul Governorship say they haven't received any reports of earthquake damage yet.

A magnitude 7.8 earthquake on Feb. 6, 2023, and a second powerful tremor hours later, destroyed or damaged hundreds of thousands of buildings in 11 southern and southeastern provinces, leaving more than 53,000 people dead. Another 6,000 people were killed in the northern parts of neighboring Syria.

A 6.2 magnitude earthquake shook Istanbul on Wednesday, prompting people to evacuate buildings. Here's what we know so far.