Anchorage, Alaska ? A series of strong aftershocks in Alaska’s Aleutian Islands region followed a powerful earthquake that shook the remote area, but officials say there are no reports of damage or injury. There also is no threat of a tsunami from any of the quakes.

The U.S. Geological Survey said the initial 6.7-magnitude temblor struck at 9:56 p.m. Saturday and was centered in the Bering Sea about 155 miles southwest of Dutch Harbor. The quake hit about 21 miles beneath the seabed.

USGS geophysicist Rafael Abreu says there have been at least 11 aftershocks, including one occurring at 11:48 a.m. Sunday that had a 5.8 preliminary magnitude. He says that magnitude is still under review and could change.