The epicentre of the quake at 9.56 p.m. was monitored at 24.2 degrees north latitude and 121.72 degrees east longitude, with a depth of 10 km, it said.
A 5.5-magnitude aftershock was reported at 10.13 p.m. in the same region, the centre said in another statement.
However, Taiwan's meteorological authority said that a series of earthquakes hit Hualien, with the strongest measuring 5.8.
The first quake struck at 9.12 p.m. and was followed by at least six aftershocks.
Residents in Hualien said they had felt the quakes clearly at home. Local media reported that the quakes affected four trains.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
