The quake hit at 6:16 pm (0816 GMT) at a depth of 10 kilometers (six miles), 96 kilometers south-southeast of Ifalik in Micronesia, the United States Geological Survey (USGS) said.
It followed another 6.1-magnitude quake which hit in almost exactly the same location earlier Thursday.
The Hawaii-based Pacific Tsunami Warning Center said there was no threat of a destructive widespread tsunami.
RELATED STORY
Strong 6.1-magnitude quake hits near Micronesia—USGS
MOST READ
LATEST STORIES