A magnitude-6.1 earthquake struck northwest Turkey during Wednesdays early hours, injuring at least 50 people.
National authorities said the quake was at a magnitude of 5.9 - lower than the 6.1 given by the US Geological Survey - and its epicentre was in Duzce provinces Golyaka district, though it also shook other nearby cities.
That quake killed more than 17,000 people, including about 1,000 in Istanbul.
Experts have long warned a large quake could devastate Istanbul, which has allowed... [see source for more information]