A major earthquake struck early Sunday morning off the Alaskan coast, the United States Geological Survey said.

The 7.1-magnitude temblor hit at 1:30 a.m. AKST Sunday (5:30 a.m. EST Sunday), the USGS said. The epicenter was located 52 miles east of Old Iliamna, Alaska.

The earthquake was felt in Anchorage and caused power outages in the region. At least 10,000 customers were without electricity in the Anchorage area on Sunday morning, utilities reported.

Anchorage firefighters responded to numerous reports of gas odors, alarm systems sounding and broken water lines, the department said on its Twitter feed.

The largest recorded earthquake in the Anchorage area was a 9.2-magnitude temblor, which generated a massive tsunami in March 1964. More than 130 people died in the earthquake and tsunami.