Scientists have discovered what a 22-mile-wide crater would be buried deep under Greenland ice
If so, it would be the second discovery that has been reported in the last few months.
NASA's glaciologist observed signs of possible craters in north-west Greenland just 114 miles from the recently discovered crater under the Hiawatha glacier, clearing satellite images and terrain maps.
How and when it was created remains a mystery, although scientists are suspected it may be over 80,000 years
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NASA glaciologist noticed potential craters in North West Greenland after 114 miles from a recently discovered crater under the Hiawatha Glacier (pictured). satellite imagery and terrain topographic mapping
The investigator analyzed NASA's Terra and Aqua satellite images along with NASA's IceBridge images and discovered what seems like a bowl-forming depression in the bedrock. The suspected crater is estimated to be 22.7 miles wide (shown)
"We have explored the Earth in various ways: from earth, air and space – it's interesting that such discoveries are still possible," said Joe MacGregor, NASA Goddard Space Flight Center Glaciologist, who participated in a previously published Crater Discovery in 2018. November
This crater, which is believed to be 19 miles wide, sits beneath the Hiawatha glacier and is now the first impact crater
It was previously thought that many of the evidence of ancient influences would have been eroded by the erosion of the upper ice over many years.
But after the first discovery, the team began to suspect
"I started asking myself" Is this another crater? Does the basic data support this idea? "MacGregor said. "
" Helping to identify one large impact crater under the ice was already very interesting, but now it seemed that there could be two of them.
Analyzing the images of Moderate Resolution Imaging Spectroradiometer devices from NASA's Terra and Aqua satellites, along with NASA's IceBridge devices, and discovering a bowl-shaped depression in the base rock.
The suspected crater is believed to be 22.7 miles away.
According to the team, this would be the 22nd largest crater, known on Earth, if one actually appeared.
"The only circular structure that could approach such a size would be a volcanic caldera," MacGregor said.
"There are several hundred miles of volcanic activity known in Greenland. In addition, the volcano should have a clear positive magnetic anomaly, and we do not see it.
Although the new crater is just 114 miles from November. Published, scientists say that at the same time scientists have formed
Scientists have discovered what could be a 22-mile-wide impact crater buried deep under Greenland ice
The ice area is at least 79,000 years old, the team says
. impact crater, scientists say it happened more than 79,000 years ago, or, if it was recently, all the ice from eroded times
"The ice layers above this second crater are unequivocally older than those over Hiawatha, o the second crater is about twice Ergina, MacGregor said.
"If both of them were created at the same time, the thicker ice over the second crater would probably be balanced with the crater much faster than Hiawatha."
The team says that it is possible that both neighboring craters were simply formed by completely separate impact events
] WHAT IS INTENDED FOR HIAWATHA IMPACT CRATER 2018
The 19 km wide (30 km) crater left at the event was hidden for at least 12,000 years after the Hiawatha Glacier in the remote north-west of Greenland
Scientists recently discovered what is the first known impact crater found under one of the Earth's ice sheets.
A million mile (0.8 km) under the ice in Greenland found a huge meteor crater, five times larger than Paris
. It is one of the greatest impact craters on Earth and offers a 3,300-foot (1,000-meter) object made of iron that collapsed into our planet during the last ice age
It is believed that the resulting explosion leaked a few hundred miles in all directions to the modern The Canadian
million meteor descended from the power of 47 million Hiroshima bombs, destroying their entire life within a 60-mile (100-km) radius, researchers said.
. The crater measures 19 miles (31 km), covering five times the area of Paris. Scientists have investigated the size and shape of the crater to predict the impact the meteor could have on
The 19 km (30 km) crater left during the event was hidden at least 12,000 years after the Hiawatha Glacier in the north-west of Greenland, although scientists categorically did not mention the event
Greenland ice sheets may have already begun for three million years
. Crater was identified with data collected since 1997. By 2014, Add More Collected In 2016 Using Advanced Radar Form.
This is in line with the Earth Craters record,
. the possibility that two new Greenland craters were made at one event, such as the effect of a well-separated binary asteroid, but we also cannot, – said William Bottke, planetary scientist at the Southwest Research Institute Bouldere
"The existence of a third pair of unrelated craters is a bit so surprising, but we don't think it is unlikely, ”MacGregor said.
"In general, the evidence we have gathered shows that this new structure is likely to be a shock crater, but at the moment it seems that it is not double with Hiawatha.