Buildings were also shaken in Santiago, Reuters reported citing witnesses.
There have been no immediate reports of damage or injuries, and the quake did not generate the necessary conditions for creating a tsunami, Reuters reported, citing emergency services.
The quake is the latest tremor in a series of aftershocks that followed a massive earthquake in the same area last week. An 8.3 quake hit Chile at that time, which generated a destructive tsunami and killed at least 13 people.