A distressed mother on Friday called the return of the death sentence after her daughter's 16-year-old murderer was imprisoned for a least of 14 years.

Joshua Davies tempted past girlfriend Rebecca Aylward, 15, to a wood near Bridgend last year and bludgeoned her to death with a rock.

He left her lying face-down in the rain, wearing new clothes she had purchased for the meeting.

The atrocious killing was carried out on a cut off patch of woodland at Aberkenfig, near Bridgend, last October.

Davies was on Friday given an undefined punishment at Swansea Crown Court and told he would serve up no less than 14 years in jail before he is believed for parole.

As he passed punishment, testing Judge Justice Lloyd Jones called Davies "devious, calculating and controlling" and said he had shown no guilt.

The court had earlier heard that a few weeks ago the murder, a friend presented to purchase Davies breakfast if he killed Rebecca.

Two days before Rebecca died, Davies texted the friend saying: "Don’t say something but you may just owe me a breakfast."

Davies' barrister Peter Rouch QC said his client upholds that his best friend was the killer.

Sonia Aylward, Rebecca's mother, said Davies justified the death sentence.

"The evil-doer Joshua Davies deprived from us of watching our costly and perfect little girl flourish into a victorious young woman," she said after the punishing hearing.

"We will never let off him for splitting our world apart so viciously and I would greet the return of capital penalty for the likes of Joshua Davies, who surrendered his human rights when he decide to take my daughter's life."

She paid tribute to Rebecca, who she explained as "a talented student, a magnificent friend but, most significantly, a loved and loving daughter and sister.

"There is no misgiving in my mind that Rebecca was intended for great things," she said.

An major earthquake measuring a preliminary magnitude of 7.1 has rocked portions of Alaska, the U.S. Geological Survey reports. The U.S. Geological Service issued, then canceled, a tsunami warning for Alaska's Aleutian Islands. USGS also lowered the magnitude to 6.8

Updated at 9:25 a.m. ET: The Aleutian Islands are no stranger to earthquakes. Agence France-Presse reports that the islands sit on the Pacific Ring of Fire, a "horseshoe-shaped seismic belt 25,000 miles long where most of the world's earthquakes and volcanic eruptions occur."

Updated at 9:00 a.m ET: The USGS has lowered the magnitude of the quake to 6.8.

Updated at 8:50 a.m . ET: The tsunami warning was canceled after only a small wave was recorded near Atka, Alaska, the Associated Press reports. "In Atka, they had a little bump of a wave, but nothing of any kind of a destructive power. Just a wave," said Jeremy Zidek, a spokesman for the Alaska Department of Homeland Security.

Updated at 8:27 a.m. ET: The tsunami warning has been canceled.

Updated at 8:15 a.m. ET: AP reports that a woman who answered the phone at the city hall in Unalaska but declined to give her name said people at Dutch Harbor were awakened by sirens. 

"We have some people on high ground, but not a lot," she said. "Sirens woke us all up — everybody's moving."

Updated at 8:07 ET: CNN reports that the shallow depth of the quake -- 6.2 miles -- would make it capable of causing damage. It struck, however, in a sparsely populated part of the Aleutian Islands, the Geological Survey said.

Updated at 7:55 a.m. ET: National Oceanic and Atmospheric Administration is urging all coastal residents within the tsunami warning area to move inland to higher ground and away from all harbours and inlets, including those directly sheltered from the sea.

People who felt the earth shake may see unusual wave action or may see the water level rising or receding. If so, they may have only a few minutes before the arrival of a tsunami, NOAA warned.

Original post: The USGS says the earthquake struck in the waters southeast of Atka, Alaska, in the north-Pacific island chain at about 6:55 a.m. ET, and there are no initial reports of injuries or damage, Reuters reports.

The tsunami warning is in effect for coastal areas of Alaska from Unimak Pass to Amchitka Pass. The areas are very remote and not heavily populated, according to Jessica Sigala, geophysicist with the USGS in Golden, Colo.

The Pacific Tsunami Warning Center said it did not see a threat of a Pacific-wide destructive tsunami from the quake.