Last updated on: October 23, 2011 21:01 IST A 7.3 magnitude earthquake in eastern Turkey today has killed 500 to 1,000 people, the head of a seismological institute in Istanbul said.”Five hundred to 1,000 people are estimated to have been killed in the quake,” Professor Mustafa Erdik, director of the Kandilli seismological institute in Istanbul, told a news conference.Click NEXT to read further… Image: Rescue workers try to save people trapped under debris after an earthquake in a village near the eastern Turkish city of VanPhotographs: Reuters