Several earthquakes have hit Turkey's largest city Istanbul - the strongest with a magnitude of 6.2 The tremors - also felt in the Turkish capital 275 miles away - sparked panic as people fled shaking buildings No significant damage has been reported so far - but officials say at least 151 people are injured after jumping from heights in fear The BBC's Orla Guerin says she's never felt a quake as strong in her six years living in the city Scientists have long said a big earthquake could hit the city at any time, so moments like this always strike fear into residents, our reporter Asya Robins says