WASHINGTON - A magnitude-7.1 earthquake struck off the southeast coast of the Philippines in the early hours of Thursday local time and a tsunami warning was issued, according to the U.S. Geological Survey.The Philippine Institute of Volcanology and Seismology, however, said on Twitter there was no tsunami threat to the country. There were no early reports of significant shocks or damage, Reuters said.The quake, which hit off Mindanao Island at 1:46 a.m. Thursday, was at a depth of 65.6 kilometers, according to the USGS.The U.S. National Weather Service had initially warned of the possibili…READ FULL ARTICLE