An evacuation of coastal areas of Los Lagos region has been ordered by the country's national emergency office.
Secondary roads and electric service have also been affected in the area, Toro said.
More than 524 people were killed in a much stronger natural disaster measuring 8.8 on the Richter scale that had struck Chile in February 2010.
Although the quake hit over 100 miles from Puerto Montt, the Pacific Tsunami Warning Center warned that devastating waves could easily hit coasts of over 1,000km away. The warning was later lifted.
The US Geological Survey (USGS) said in a report on its Web site that the temblor had a magnitude of 7.7.
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There were no immediate reports of casualties, though electricity was cut to some communities.
The quake struck when most people were celebrating Christmas in the evening.
The region is home to several industrial salmon farms. Chilean officials called for coastal areas nearby to be evacuated. Thankfully, Sunday's quake in Quellon, Chile was nowhere near as intense or deadly - and the region is more than prepared for earthquakes given the country's location over several major active fault zones.
Chile's state-run oil company ENAP said its Bio Bio refinery in southern Chile was operating normally.
In 2010, a devastating 8.8 magnitude natural disaster and tsunami killed more than 700 people in Chile.