An earthquake of 6.4 magnitude struck off the coast of northern class="mandelbrot_refrag"> Greece on Saturday, sending panicked residents into the streets in Greece, class="mandelbrot_refrag"> Turkey and Bulgaria, officials said. _0"> In class="mandelbrot_refrag"> Turkey , about about 270 people were hospitalized, most with minor injuries, as a tremor shook buildings, the government disaster and emergency department (AFAD) said. The quake also rattled Turkey's most populous city, Istanbul, as well as the Aegean coastal city of Izmir and the popular tourism province of Antalya on the Mediterranean coast. One person was in critical condition after jumping from a balcony in the western Turkish town of Canakkale, AFAD said. true Hurriyet Daily News reported 30 people injured jumping out of apartments in the town and patients in one hospital were evacuated after cracks emerged in the building. The U.S. Geological Survey