A 6.8 earthquake has struck south off the island of Mindanao, triggering a warning of "hazardous tsunami waves" for the coastline of islands in the Philippines, according to the US Geological Survey and the Pacific Tsunami Warning Center. The Pacific Tsunami Warning Center said that tsunami waves could reach 300km from the epicenter of the earthquake, which was recorded at 6.8 on the Richter scale. Waves reaching up to 1 meter above normal tide levels are possible in the Philippines, while some coastlines in Indonesia, Malaysia and Palau could expect waves up to 30 centimeters higher than usual, the Pacific Tsunami Warning Center said. The quake, which