<p>A magnitude 7 earthquake struck Tonga on Sunday, the German Research Centre for Geosciences (GFZ) said. The quake was at a depth of 16 km (10 miles), GFZ said.</p><p>GFZ had earlier pegged the earthquake at 6.6.</p> .<p>Hazardous tsunami waves from this earthquake are possible within 300 km of the epicenter along the coasts of Tonga, the Pacific Tsunami Warning System said. Tonga is a Polynesian kingdom of more than 170 South Pacific islands.</p>
<p>A magnitude 7 earthquake struck Tonga on Sunday, the German Research Centre for Geosciences (GFZ) said. The quake was at a depth of 16 km (10 miles), GFZ said.</p><p>GFZ had earlier pegged the earthquake at 6.6.</p> .<p>Hazardous tsunami waves from this earthquake are possible within 300 km of the epicenter along the coasts of Tonga, the Pacific Tsunami Warning System said. Tonga is a Polynesian kingdom of more than 170 South Pacific islands.</p>