Earth Changes
The quake struck the South Georgia island region at a depth of about 10 kilometres, according to the USGS.
The islands host a British Antarctic research station - around 1,500 miles east of the Falklands.
It was the centre of British whaling for decades until the trade was abandoned in the 1960s.
There were reports of tremors in the nearby Falkland Islands.
No immediate tsunami warning was issued.
It comes just months after a 7.2 magnitude quake struck the South Sandwich Islands.
The carcass of the large sea mammal was found Tuesday and recovered Wednesday by the S.C. Department of Natural Resources. A necropsy was underway.
White, of Oakmont, Pa., and others who saw it thought it might have been struck by a boat. An adult manatee has few if any natural predators.
"It was sad," he said. "They'd never hurt anything."
But no sign of a strike was found.
"The results were inconclusive, except to note an acute cause of death," said Erin Weeks, DNR spokeswoman. "There were no obvious propeller wounds or broken ribs, but the animal had been healthy and feeding full of plant material up until its death." The manatee a young male, 9½ feet long, she said.
The latest incident happened at a property in a residential street in Halstead at 5.40pm on Thursday.
A 29-year-old woman was arrested for allowing a dog to be dangerously out of control and injuring a person, Essex police said. The dog was seized by police and placed in kennels. Police said they had yet to establish its breed. Two officers were guarding the owner's home in Parker Way, Halstead.
The three-year-old boy was airlifted to Addenbrooke's hospital in Cambridgeshire where he died from his injuries, the East of England ambulance service said.
On Monday a 52-year-old man was killed by a dog that had been returned to its owner despite concerns that it was dangerous.

Smoke rises from a burned out grove of trees at the Blue Cut wildfire in Wrightwood, California, on Aug. 17, 2016.
Cal Fire Battalion Chief Mike Mohler told ABC News today, "Explosive fires are the new normal. ... I've never seen in 22 years fire activity like that."
"The containment is going to be very slow," he said. "We still have a long fight ahead of us."
More than 1,500 personnel are at the scene today. The blaze is just 4 percent contained.
Officials said the fire, named after the Blue Cut hiking trail, began Tuesday morning for unknown reasons. It quickly grew to nearly 30,000 acres by Wednesday.
"It was such a large flame front and it came so fast and so hard that firefighters did all they could to basically get people out of the way of this advancing front," San Bernardino County Fire Chief Mark Hartwig told ABC News this morning.
A four-year-old boy has died after being attacked by the family dog in Oudtshoorn.
The incident occurred at the weekend.
The police's Malcolm Poje says the child died in hospital.
"I can confirm that we've opened an inquest docket pertaining to the incident in Oudtshoorn, where a young child was apparently attacked by a dog. He was taken to hospital with multiple injuries to his face and head. He had unfortunately succumbed to his injuries."
The dog has reportedly been put down.
Metro's Lt. Timothy Hatchet said the attack occurred before 3:30 p.m. in the 6000 block of Duck Hills Springs Drive, near East Desert Inn Road.
Hatchet said the child was visiting a friend's house when the dog, a pit bull, attacked. The child was taken to Sunrise Hospital Trauma, where he or she was later pronounced dead.
Metro detectives were investigating the attack Wednesday night, and the dog was taken by animal control officers.
Phil Shoemaker, a guide for over 33 years, was accompanying the couple on a fishing trip to a small stream deep in the wilderness when they startled a brown bear. He wrote in American Hunter that he decided to bring a 9mm pistol with him for protection since he knew bears might be in the area.
"Larry and his wife were fishing with me, and because we were going to a small stream I had fished before, which had numerous large male brown bears, I decided to take my Smith & Wesson 3953 DAO 9mm, rather than the S&W 629 .44 Mag. Mountain Gun I have carried for the past 25 years, as the larger boars are usually less of a problem than sows with cubs," Shoemaker said.
An Asian black bear was seen climbing into a small vehicle at the Gunma Safari Park, northwest of Tokyo, and attacking park employee Kiyomi Saito inside the car, a local police spokesman said.
Saito, 46, suffered injuries to the left side of her chest and stomach and was rushed to hospital where she was later confirmed dead, the spokesman said.
"The details are not yet known, including how the bear got inside the car," he told AFP, adding the animal was a five-year-old male and weighing 160 kilogrammes (352 pounds).
That's true for her horses Fern and Lore. It was also true for her horse, Zip. A few weeks ago Hammersmith was woken up by a series of yips and then something that sounded like a scream. It was Zip.
"I looked out the window and I could see him trying to walk. And he was laying on his back," said Hammersmith.
The horse was trying to fight off what Hammersmith says was a pack of coyotes. Zip caught and broke his leg on a wire fence. There were bite marks on the horse. Within the hour, a veterinarian humanely euthanized the horse.












Comment: State of emergency declared for wildfire raging in San Bernardino, California; 18,000 acres burned and 82,000 people evacuated