Magnitude 7.1 earthquake hits southern Japan, tsunami warning

A magnitude 7.1 earthquake struck Japan's southern Kumamoto prefecture on Tuesday, triggering tsunami warnings and knocking out power to about 40,000 homes. The Japan Meteorological Agency issued a tsunami advisory for waves up to 1 metre. Prime Minister Sanae Takaichi urged vigilance for possible aftershocks. Rail services were suspended, but no irregularities at nuclear plants. Japan sits on the Ring of Fire and experiences frequent quakes.