The first quake, which struck at 5:45 pm (local time), was 601 kilometres deep, according to the US Geological Survey.
It was located about 169 kilometres west-northwest of Iberia and 688 kilometres east-northeast of the capital Lima.
Five minutes later, a second temblor of the same strength rocked the same area but with a different epicentre.
"According to the real-time map there were two magnitude 7.6 in different locations," a USGS official explained. And there were three aftershocks, he added.
"It's such a deep movement that it moves out further, and is felt over a wider area," director of the private weather firm Ambiand, told Canal N.
"So far there have been no reports of damages but we are following this closely," civil defense chief Alfredo Murgueytio told the same network.
The navy ruled out the likelihood of a tsunami.
Peru lies on what is known as the "Ring of Fire" -- an arc of fault lines that circles the Pacific Basin and is prone to frequent earthquakes and volcanic eruptions.
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