A morning earthquake gave many Southcentral Alaskans a wake-up call Sunday.

The U.S. Geological Survey listed a 5.0 preliminary magnitude, revised from 5.1, for the 7:45 a.m. quake. It struck 8.7 miles northwest of Anchorage at a depth of 20.7 miles.

The quake is the region’s latest in the wake of Nov. 30’s 7.0 temblor. It is the seventh magnitude 5.0 or larger aftershock and the 39th 4.0 and larger.

This is the largest aftershock in 13 days.

Melissa Frey contributed information to this story.

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