Tokyo, Japan (CNN)A powerful earthquake that hit Japan on Saturday was an aftershock of the devastating 9.0 magnitude quake that struck the same area almost 10 years ago, according to the national Meteorological Agency.
Japan rocked by 'aftershock' from devastating 9.0-magnitude quake that hit in 2011
The 7.1 magnitude earthquake struck the country's east coast at 11:07 p.m. Saturday. At least 48 injuries were reported in Fukushima and Miyagi prefectures, according to state broadcaster NHK, but there were no major casualties.
The epicenter hit about 46 miles (74 kilometers) northeast of Namie, a coastal town 60 miles from Fukushima, according to the United States Geological Survey. The earthquake measured about 36 miles in depth. No tsunami warning was issued.
Saturday's quake took place in the same area as the March 11, 2011, earthquake that caused the country's worst nuclear disaster on record, when three reactors at the Fukushima Daiichi nuclear plant melted down, releasing radioactive materials into the air.