Officials say a strong earthquake has jolted a sparsely populated region in northwestern Greenland, but no injuries or damage have been reported.

Peter Voss of The Geological Survey of Denmark and Greenland says the quake occurred Tuesday with a preliminary magnitude of 6.1 on the Richter scale.

He says the epicenter was in the Arctic Sea, 55 miles south of Thule, home to a U.S. air base.

Voss said Wednesday the earthquake was one of the strongest recorded in Greenland.

In 2005, a quake in northeastern Greenland measured 5.3 on the Richter scale.