Değirmendere is a municipal town in the Gölcük district of Kocaeli Province , Turkey . The town is located on the south coast of Izmit Bay . The quarters of Değirmendere are named as Yüzbaşılar , Yukarı Değirmendere ( '' Upper Değirmendere '' ) , and Kuruçeşme . The town lies between Gölcük and Halidere , and it was the epicenter of the 1999 Marmara earthquake that almost wiped out the town as well as neighboring towns . Değirmendere is well known for its hazelnuts , sweet cherries , and public cultural activities
1999 Marmara earthquake
1999 İzmit earthquake
Değirmendere, Gölcük