Cell phone lines, however, appeared to be down and alarmed shoppers left malls following the tremor, according to local radio.
The quake shouldn’t trigger a tsunami, Chile’s navy said.
Highly seismic Chile was battered by an 8.8 magnitude quake in February 2010, whose subsequent tsunami devastated large parts of the south-central coastline.
It was not immediately clear if mines in the world No.1 copper producer were affected.
State miner Codelco’s El Teniente and Andina mines are located in the central region, as are global miner Anglo American’s Sur properties.