Southern Japan experienced two powerful earthquakes on Thursday, with magnitudes of 6.9 and 7.1, leading to a tsunami advisory. The quakes, centered off the coast of Kyushu, prompted warnings of waves up to one meter and reports of broken windows at Miyazaki Airport. The Japan Meteorological Agency and the US Geological Survey confirmed the tremors, noting their depths at 30 kilometers. Despite the significant seismic activity, there were no immediate reports of major damage or issues at nuclear plants in the region. Japan, located on the Pacific 'Ring of Fire,' frequently experiences such tectonic events.