 The main impact in Tonga was in the northern part of the island kingdom where there were deaths, injuries and extensive damage on Niuatoputapu, a flat coral island 500 km north of the main island Tongatapu, and reportedly closest to the epicentre of the earthquake.The death toll on the island has risen to nine.A Tongan government spokesman Alfred Soakai said 90% of homes had been destroyed as well as serious damage to the hospital.