The cavity is two-thirds the size of Manhattan.
Researchers say the cavity would once have been large enough to hold some 14 billion tonnes of ice.
The icy monster "backstops neighbouring glaciers that would raise sea levels an additional 8 feet (2.4 metres) if all the ice were lost", Nasa warned. The research has shown that Thwaites Glacier is peeling off from the bedrock beneath it, meaning more of the glacier's base is exposed to warming waters.
Worse, Thwaites Glacier acts as a kind of "door stop", preventing adjoining glaciers from sliding towards the sea.
Bute size and explosive growth rate of the newfound hole surprised them.More news: Fowler blows big lead, recovers to win WM Phoenix Open
Now, thanks to NASA's Operation IceBridge, we learned that a large cavity has formed beneath Thwaites Glacier in West Antarctica. The specialists likewise utilized information from a star grouping of Italian and German spaceborne manufactured opening radars.
"[The size of] a cavity under a glacier plays an important role in melting", study leader Pietro Milillo of NASA's Jet Propulsion Lab (JPL) said in a statement.
It seems that scientist will be able to learn more about the interaction between water and ice as new mechanisms of retreat were also spotted. Hopefully, the upcoming global collaboration will help researchers piece together the different systems at work under and around the glacier, the researchers said.
The "grounding line" or edge of the massive ice Antarctic ice shelf retreats and advances over an area of about two to three miles (three to five kilometers) each year, but has shrunk at a rate of between 0.4 and 0.5 miles (0.6 to 0.8 kilometers) each year since 1992.
The cavity highlight the need for further observations to have a better idea of just how fast sea levels will rise. With climate change likely to continue accelerating this melt, the implications for global sea level rise are considerable. In turn, this makes the glacier even more susceptible to melting.More news: New Zealander reportedly among skiers killed in avalanches in the Italian Alps
The Thwaites glacier is slightly smaller than the total size of the United Kingdom, approximately the same size as the state of Washington, and is located in the Amundsen Sea.
Different processes at various parts of the 160-kilometre-long front of the glacier are putting the rates of grounding-line retreat and of ice loss out of sync, NASA said.
From 1992 to 2011, the centre of the Thwaites grounding line retreated by almost 14 kilometres.
"The researchers on the current study hope that these new results will help inform that team's work", the news portal continued.More news: Rapper 21 Savage Arrested By ICE Days After Trashing Trump Border Policy