By Nurettin Coskun
ISTANBUL (AA) - A magnitude 3.9 earthquake shook the Turkish metropolis Istanbul on Thursday, according to Turkey's Disaster and Emergency Management Authority (AFAD).
AFAD said a 3.9-magnitude earthquake centered in the Sea of Marmara hit at 23.20 p.m. (2020GMT).
The earthquake, off Silivri district, occurred at a depth of 7.2 kilometers (4.4 miles), some 21.2 km (13.1 mi) from Silivri.
Earlier Thursday, a 5.8-magnitude earthquake struck Istanbul and was centered in the Sea of Marmara at 1.59 p.m. local time (1059GMT).