The Pacific Tsunami Warning Center, based in Hawaii, said yesterday that the quake, which hit at 0214 GMT (0744 IST) at 10 kilometers deep, registered as a 6.8 before upgrading it to a 7.2.
"An earthquake with a preliminary magnitude of 7.2 occurred near the southern East Pacific rise at 0215 UTC (GMT) Thursday, October 9 2014," a statement from the Pacific center said.
"There is no tsunami threat from this earthquake," it added.
The US Geological Survey said the tremblor registered as a 6.8.
An 8.2-magnitude quake in northern Chile in April killed six people and forced a million to flee their homes in the region around Iquique.
And a February 27, 2010 quake that struck just off the coast of Chile's Maule region measured 8.8 in magnitude, making it one of the largest ever recorded.
It killed more than 500 people and inflicted an estimated USD 30 billion in damages.
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