Google's earthquake warning system failed to get to many Turkish residents before February's deadly tremor, a BBC investigation has found.<br /> <br />Google said its alert system can give users up to a minute's notice on their phones before an earthquake hits.<br /> <br />It said its alert was sent to millions before the first, biggest quake.<br /> <br />However, the BBC visited three cities in the earthquake zone, speaking to hundreds of people, and didn't find anyone who had received a warning.<br />
