A strong earthquake with a magnitude of 5.7 shook southern Alaska on Saturday, the US Geological Survey said.
The quake's epicenter was located 56 kilometers (35 miles) west of the town of Nanwalek, and about 259 km (161 miles) southwest of Anchorage, the largest city in Alaska, the USGS said in a statement.
The USGS initially measured the quake at magnitude 6.1, then revised the strength downward.
There were no immediate reports of casualties or destruction.
The quake occurred at a depth of 100 kilometers (62 miles), said the USGS.
A massive earthquake of magnitude 9.2 struck Alaska on March 27, 1964, the second most powerful quake ever recorded. The epicenter was in Prince William Sound, about 120 kilometers (75 miles) east of Anchorage.
That quake triggered a tsunami wave that struck along the US Pacific coast. Only 131 people were killed, largely because the quake occurred on a holiday weekend.
Over the last 100 years an average of one earthquake of magnitude 7 has occurred in Alaska every year, according to the USGS.
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