Second Huge Meteor Impact Crater Discovered Deep Beneath Greenland Ice, Scientists Say

A Nasa graphic showing the possible outline of the latest crater discovered in Antarctica

The newly discovered huge meteorite crater beneath Greenland's ice measures a little over 22 miles wide, and is freely considered one of the largest meteorite impact sites on the planet, as long as scientists confirm that it was created as a result of an impact between a large space rock and Earth.

Why it matters: This would be the third pair of craters that sit close to one another that we've found on Earth.

This follows the finding, announced in November 2018, of a 19-mile-wide crater beneath Hiawatha Glacier - the first meteorite impact crater ever discovered under Earth's ice sheets.

Though the newly found impact sites in northwest Greenland are only 114 miles apart, at present they do not appear to have formed at the same time.

More specifically, this second ancient subglacial crater detected by the U.S. space agency stretches across about 37 kilometers under two kilometers of ice in northwest Greenland.

A glaciologist at NASA's Goddard Space Flight Center in Greenbelt, Md., Joe MacGregor, was wondering if they have found another impact crater, but that should be confirmed by the data. Following the discovery, researchers have looked for signs of other craters using topographic maps and satellite imagery.

"The only other circular structure that might approach this size would be a collapsed volcanic caldera", MacGregor said in a statement. He then used raw radar images generally used to map the topography of the bedrock beneath the ice and saw that several distinct features including a flat, bowl-shaped depression in the bedrock with an elevated rim, were buried under the ice. This thicker ice may have eroded the crater faster, or if the crater formed earlier than the Hiawatha crater, there would have simply been more time for erosion to take its toll.

Georgia's Crean lands commitment from No. 2 prospect Edwards
He noted Georgia coach Tom Crean's relationship with two National Basketball Association stars as a factor in his decision. The shooting guard visited both Georgia and Kentucky but never accepted an invitation to visit Kansas and North Carolina .

Impressed by that discovery, a crew led by NASA glaciologist Joseph MacGregor began scanning Greenland for different craters. Though the structure isn't as clearly circular as the Hiawatha crater, MacGregor estimated the second crater's diameter at 22.7 miles.

Scientists have recognized about 200 affect craters on our planet, however that is exclusively the second time in historical past that a crater has been detected beneath an ice sheet.

If, at some point in the future, MacGregor's discovery is conclusively determined through drilling and geophysical surveying to be an impact crater, it will be the 22nd-largest on record in the world. Experts say that the crater was formed by a meteorite that struck Earth "less than 3 million years ago" and likely "rocked the Northern Hemisphere".

'But the areas of known volcanic activity in Greenland are several hundred miles away.

The best current estimate dates the new crater around 2.6 million years old, much older than the Hiawatha crater at roughly 100,000 years. "Also, a volcano should have a clear positive magnetic anomaly, and we don't see that at all", Dr. MacGregor said.

It was found thanks to NASA satellite images of the ice sheet surface and radar data from airborne missions. Do the underlying data support that idea?'

Satellite view of the Hiawatha crater (upper left), and the position of the new potential impact crater identified by the new study.

Related News:

  • Airbus to stop making struggling A380 superjumbo in 2021

    Airbus to stop making struggling A380 superjumbo in 2021

    The order was made back in the 2006, but the planes have not been "part of the airline's fleet and network plans for some time". But cracks in the future of the huge superjumbo jet began to form in 2016 when Airbus reduced its production rate by half.
    Offset shares footage of Cardi B in delivery room

    Offset shares footage of Cardi B in delivery room

    After being named the Grammy victor at the 61st annual ceremony, Cardi accepted the trophy alongside her Migos rapper husband, 27. Now, to top all that off, Offset made a decision to use a very graphic video of Cardi B giving birth to promote his new album.
    Meghan spotted at gala in first appearance since dad revealed 'devastating' letter

    Meghan spotted at gala in first appearance since dad revealed 'devastating' letter

    In the handwritten note, Meghan said: "We all rallied around to support and protect you from day 1, and this you know. Harry's mother, Diana, Princess of Wales , had a notoriously hard relationship with parts of the British media.
  • Michael Jordan WRECKS James Harden and Russell Westbrook

    Michael Jordan WRECKS James Harden and Russell Westbrook

    The only thing seemingly that has eluded Jordan is ultimate success as an executive and team owner. The GOAT took the opportunity to take a shot at both Harden and Westbrook on Tuesday.
    California nixes plans for high-speed LA-SF rail line

    California nixes plans for high-speed LA-SF rail line

    Newsom criticized "fear-mongering that's coming out of the White House ", likening Trump's rhetoric on immigrants to George W. Newsom said the project has been botched and suffered "too many years of neglect" from bureaucrats and decision-makers.
    Watch The Latest Nintendo Direct Here

    Watch The Latest Nintendo Direct Here

    We can speculate that we might see some of the phantom thief in action ahead of the DLC's release later this year. You can also tune in right here on GameSpot and follow along with the Direct using the YouTube embed below.
  • New leaks give us a close look at the LG G8 ThinQ

    New leaks give us a close look at the LG G8 ThinQ

    Furthermore, "full-bodied stereo performance" is possible, with the phone using the top part of the screen and the bottom speaker. Now, the OEM has confirmed that the upcoming flagship will also feature an OLED display that works as an audio amplifier.
    Injury-hit Spurs beat Dortmund, holders edge Ajax

    Injury-hit Spurs beat Dortmund, holders edge Ajax

    The timing of the first goal was very important, the cross was unreal, I didn't have to do anything, just touch the ball. He added: "I must say, they get a lot of money before they play games".
    Mars One is dead

    Mars One is dead

    The investment company now in talks "has expressed its intention" to pay Mars One's creditors that money owed. At least the company went bankrupt before sending people out in space, as refunds would be quite hard .
  • At least 41 killed in Iran bombing on Revolutionary Guard personnel bus

    At least 41 killed in Iran bombing on Revolutionary Guard personnel bus

    Iran's supreme leader Ayatollah Ali Khamenei also spoke out against the conference, citing it as an example of USA failure against the Islamic republic.
    Bill Cosby: 'I have no remorse'

    Bill Cosby: 'I have no remorse'

    His first sexual assault trial ended in a mistrial, but he was re-tried and subsequently sent to prison for three to ten years. Bill Cosby is shedding light on his day-to-day life behind bars and, according to his spokesman, it's not so bad.
    Westbrook sets another triple-double record in Thunder win

    Westbrook sets another triple-double record in Thunder win

    Westbrook will look for his 11th straight triple double Thursday as the Thunder face the Pelicans in New Orleans. The six-time All-Star admitted he had not realized the landmark was just one assist away.

Most liked

Tesla has rolled out a DOG MODE
To address the issue, Tesla has introduced a new Dog Mode so your furry friend can remain cool while you're popping by a store. New features like Dog Mode and Sentry Mode highlight the flexibility and foresight that Tesla put into its vehicles.

Aaron Paul to Star in 'Breaking Bad' Movie as Jesse Pinkman!
It's worth noting that this isn't the first time a Breaking Bad movie has been a glimmering prospect on our horizons. Jesse Pinkman lives and he's coming back in the feature-length movie based on AMC's Breaking Bad .

NASCAR Show: Talking Daytona 500 Qualifying and the Clash at Daytona
In 2018, at just 20 years old, William became the third youngest driver to win NASCAR Cup Series Rookie of the Year honors . Little did they know what was about to happen before the final red flag that called the race.

Eric Reid Signs a 3-Year Deal with Carolina Panthers
Carolina now has Reid, 2018 draft pick Rashaan Gaulden , Da'Norris Searcy and Colin Jones as safeties on the roster. Reid spent five seasons with the 49ers before joining the Panthers during the 2018 season.

Joe Root's reaction in gay sledging row 'more important than a win'
English pace bowler and teammate to Root, Stuart Broad, was present at the service and shared some snaps from the day. A five-match ODI series between the sides starts on 20 February in Barbados.

Xi Jinping to meet top USA trade negotiators in Beijing
China's Foreign Ministry referred questions on talks to the Ministry of Commerce, which did not respond to a request for comment. These include ending China's alleged violations of intellectual-property rights and forced transfers of American technologies.

Australian Open champion Naomi Osaka makes shock announcement
In his first true stint as a coach, he joined with Osaka in December 2017 and helped her win her first career title at Indian Wells last March.

Woman, 19, faces three charges in balcony chair tossing
David Hopkinson, the spokesman of the Toronto Police Service, said no one was injured in the incident. Marcella Zoia, 19 , of Toronto, was by herself when she walked into 52 division just at 7 a.m.

Airline sues passenger over skipped segment
The suit was originally dismissed by a Berlin court, but the carrier is appealing the decision, a spokesperson confirmed to CNN . By contrast, the court said, the airline's method of calculating its initial price is "completely intransparent".

Inflation to fall below target?
Consumer-price growth reached 2.05 percent in January, well below the Reserve Bank of India's medium term target of 4 percent. The Retail Prices Index (RPI), a separate measure of inflation, was 2.5 per cent, down from 2.7 per cent in December.

After 15 Years, NASA Officially Ends Opportunity Mission on Mars
The Curiosity rover, which reached the Red Planet in August 2012, has more than 12 miles on its odometer. On Wednesday, Opportunity's team bid her farewell while looking to the foundations the mission laid.

Lloris wants 'Wembley push' as Spurs seek Dortmund scalp in Champions League
We won but against a bigger side we couldn't have won that type of game. "Unbelievable, unbelievable, unbelievable", Pochettino said .

Apple reportedly wants to keep 50% of subscription news service revenue
Big publishers are pushing back against Apple's alleged financial terms for a news subscription service , sources have claimed. Once again, the source mentions that there will be no new hardware during the event.

Children found locked inside dog cage, father and mother arrested
Fabila had to be taken to the hospital for wounds on his face before being charged but was taken to jail after his treatment. Akin says the children's mother and a man at the home have been arrested on four counts each of child endangerment.

Michelle Obama’s mom says she's not a 'real' star in sassy text
Obama took the slip-up in stride, sending three laughing emojis and wrote, " I thought I told you ". Mother-daughter relationships aren't any easier when you're famous. 'She had a stream of people.