A 4.7 magnitude of earthquake struck İstanbul 2019-09-24 12:10:10 İSTANBUL - An earthquake of 4.7 magnitude struck İstanbul. An earthquake struck off the coast of Silivri  around 11.00. Kandilli Observatory announced that the 4.7-magnitude earthquake occurred at a depth of 9.8 kilometers. The earthquake was felt in many districts of Istanbul.