7.0 quake shakes Chile capital Santiago - USGS
"For the moment there are no reports of any damage or injuries," a spokesman for government emergency agency Onemi said.
"The Navy alert centre says there is no risk of a tsunami," he added.
Some residents fled into the street in parts of south-central Chile.
The offshore quake was 28 miles (45 km) north of Concepcion and 11.4 miles (18.4 km) deep, the USGS said. It was 243 miles (392 km) south-southwest of Santiago, it said.
An 8.8-magnitude earthquake and ensuing tsunami struck Chile on February 27 last year, killing about 500 people and wrecking infrastructure across central-southern areas of the country.
(Reporting by Simeon Gardner; Editing by Eric Walsh)