Frida saved 12 people's lives across her decade-long career as a search and rescue dog.
The USGS says the epicentre of the quake, initially reported as a magnitude 6.5, was 168 miles (270km) east of the small town of Severo-Kurilsk
The Fire and Rescue Services Department says it did not receive any emergency calls and the situation in the hiking area is under control.
The vast archipelago is 1 of the most disaster-hit nations on Earth due to its position straddling the so-called Pacific Ring of Fire, where tectonic plates collide.
The epicentre was located north of Catania and several families had to spend the night in the streets.
It follows a powerful 7.6 quake that struck on Wednesday.
Taiwan island lies near the junction of two tectonic plates and is regularly hit by earthquakes.
The area is prone to deep undersea earthquakes and was hit with a 7.8-magnitude tremor two months ago.
About 15,600 people felt the shaking, which most described as moderate or light.
Greece straddles two tectonic plates and often gets earthquakes.
Taiwan, a self-ruled island that China considers its own, lies near the junction of two tectonic plates and is prone to earthquakes.
The shock absorbers are part of a complex system fitted in many Japanese buildings as part of the country's earthquake preparedness.
Searchers arrived with dozens of excavators to help dig out bodies, while some residents made frequent trips to retrieve treasured belongings from the rubble of destroyed homes.
A string of earthquakes in Lombok in eastern Indonesia killed more than 550 people over the summer.
Papua New Guinea, one of the world's poorest countries, sits on the geologically active Pacific Ring of Fire and is still recovering from a 7.5 quake that hit some 900 km to the west in February, killing at least 100 people.
The quake and several aftershocks were felt as far away as the capital Port-au-Prince, sparking fear among residents still reeling from the massive 2010 earthquake that left at least 200,000 people dead.
The national disaster mitigation agency says searches for bodies will stop on Thursday.
Officials said Saturday the death toll had climbed to 1,649, with more than a thousand feared still missing in the seaside city on Sulawesi island.
Hundreds of people are believed to be entombed in slowly drying mud that enveloped communities in Palu when the quake triggered soil liquefaction.
More than a thousand people may still be missing in the seaside city on Sulawesi island after the region was hit by a powerful quake and a wall of water, with the official death toll now at 1,571.
Nevertheless there were signs of life returning to normal, with children playing in the streets, radios blaring out music, and electricity back up and running in most places.
There is no danger of a tsunami from the quake.
Rescue workers have begun to reach more remote areas in a disaster zone that includes 1.4 million people, but hundreds of thousands have received no aid.
A massive 2004 quake triggered a tsunami that killed 220,000 throughout the region, including 168,000 in Indonesia alone.