The quake`s epicenter was near the town of Pucallpa, which lies some 600 km (370 miles) from Lima in a sparsely populated central-eastern region close to the Brazilian border, the U.S. Geological Survey (USGS) said.
Telephone lines were down in the area, but local media said no serious damage or injuries had yet come to light.
"There haven`t been reports of collapsed homes, there have been problems with telephone communication," Guillermo Alvizuri, director of operations at the National Institute of Civilian Defense told local radio.
One seismologist said the depth of the quake -- 145 km (90 miles) -- meant serious damage was less likely.
Witnesses in Cruzeiro do Sul, one of the Brazilian cities closest to the epicenter, said there were no immediate reports of major damage or injuries on that side the border.
A spokesperson for the fire department in the city said there had been no emergency calls yet and the quake seemed unlikely to have caused major damage there.
Nelson Liano, a journalist, was in a supermarket in Cruzeiro do Sul, where he said some goods fell off the shelves. "It was that sensation when you`re on a boat and it rocks," he said.
Earthquake-prone Peru is a leading metals exporter, but the region near the epicenter is not a mining region.
Some oil is produced in the region and Pucallpa is also the terminus for an oil pipeline from the Ganso Azul fields. (*)
Editor: Kunto Wibisono
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