An over 8-magnitude earthquake struck off the southern coast of the Philippines on Monday, the United States Geological Survey said, with a regional warning centre issuing a tsunami alert.Earthquake of ‌magnitude ⁠8.2 struck Mindanao ⁠in ​the Philippines on Monday, ​the German Research Centre for ​Geosciences (GFZ) ⁠said.The quake ‌was ​at ​a ⁠depth of 10 km (6.2 miles), ​GFZ said. The offshore quake hit at a depth of 35 kilometres (22 miles) off the island of Mindanao, USGS said.GFZ earlier pegged the earthquake at 7.3. The ‌U.S. Tsunami Warning System issued a tsunami ⁠threat to the earthquake.The Pacific Tsunami Warning Center said in a notice that tsunami waves were possible "within the next three hours" along the coasts of the Philippines, Indonesia, Palau, Taiwan and Papua New Guinea.Japanese authorities issued a tsunami advisory on Monday along swathes of its Pacific coast after a major earthquake off the Philippines. The Japan Meteorological Agency said that tsunamis of up to one metre (three feet) were projected to hit different regions from 11:30 am (0230 GMT).U.S. tsunami warning system stated no tsunami warning, advisory, watch, or threat to the country's shores.