Copenhagen: An earthquake measuring 6.6 on the Richter scale rocked the sea area off the eastern coast of Greenland Thursday, said the US Geological Survey, reported Xinhua.
The epicentre, with a depth of 8.6 km, was 428 km off the north-eastern coast of Greenland. The quake occurred at 1.43 p.m. GMT.
The earthquake was initially measured at 7.0 on the Richter scale, said Danish broadcaster TV2 citing the US Geological Survey.
Greenland is a self-governing territory of Denmark located within the Arctic Circle.