Magnitude 7.1 earthquake strikes southern Japan: Videos and key facts after powerful quake triggers tsunami alertA powerful earthquake struck Japan on 28 July, with images showing damaged roads and buildings. A magnitude 7.1 earthquake struck Kumamoto Prefecture in southern Japan. Damage to numerous buildings and infrastructureImages and videos circulating on social media show the widespread damage caused by the powerful earthquake in southern Japan. As the earthquake struck during the day, many people were out shopping or carrying out their daily routines. Map showing the earthquake intensity and the extent of the seismic waves that swept across much of southern Japan.