A powerful earthquake rattled southern Japan on Sunday, swaying buildings and briefly prompting warnings of tsunami. At least 155 people were injured and smaller aftershocks continued to rattle the region. Within minutes, the agency warned of the possibility of 20-inch tsunami waves triggered by the seismic activity, and cautioned residents near the water to move to higher ground. But an hour after the quake, the agency said there was no danger of tsunami
. "There may be some disturbance of the ocean's surface, but we aren't worried
about tsunami damage
," said Masahiro Yamamoto of the Meteorological Agency. Pedestrians walk past collapsed bricks after a powerful earthquake struck Fukuoka in southern Japan on Sunday.