A powerful 6.8 magnitude earthquake struck Japan’s southern Kumamoto prefecture on Tuesday, causing damage to buildings, killing several and injuring dozens in one of the most earthquake-prone countries in the world. The earthquake was recorded on Kyushu, the southwesternmost of Japan’s four main islands, about 550 miles from Tokyo, the capital city. CNN is tracking the impact in maps and charts. Quakes such as Tuesday’s in Japan are measured on a magnitude scale. At least six additional quakes been recorded in the region since the larger incident, with magnitudes ranging from 4.4 to 5.6, according to USGS.