NASA finds the largest crater on Mars – measuring 500-feet-wide and caused by meteor that sent seismic waves rippling thousands of miles across the Martian surface

  • NASA announced its craft on Mars have found the largest crater impact zone yet
  • The InSight and  Mars Reconnaissance Orbiter identified a 500-foot-wide crater
  • It was carved out by seismic waves released when the surface was bombarded by meteors last year
  • The incoming space rocks were between 16 feet and 40 feet in diameter and the impacts registered about magnitude 4 

Meteors that violently crashed into Mars last year sent seismic waves rippling thousands of miles across the Martian surface and carved out what NASA deems is the largest crater found yet – it measures about 500 feet across. 

The discovery was only possible by data collected from the Insight lander that measured the seismic shocks and the Mars Reconnaissance Orbiter provided stunning pictures of the resulting craters.

The incoming space rocks were between 16 feet and 40 feet in diameter and the impacts registered about magnitude 4.

The larger of the two struck last December some 2,200 miles from InSight, creating a crater roughly 70 feet deep.

The orbiter´s cameras showed debris hurled up to 25 miles from the impact, as well as white patches of ice around the crater, the most frozen water observed at such low latitudes.

 The impact crafter measures 500 feet across and was created when meteors hit Mars last year and sent sent seismic waves rippling thousands of miles across the Martian surface

Imaging the craters ‘would have been huge already,’ but matching it to the seismic ripples was a bonus, said co-author Liliya Posiolova of Malin Space Science Systems in San Diego. ‘We were so lucky.’

Mars´ atmosphere is thin unlike on Earth, where the thick atmosphere prevents most space rocks from reaching the ground, instead breaking and incinerating them.

A separate study last month linked a recent series of smaller Martian meteoroid impacts with smaller craters closer to InSight, using data from the same lander and orbiter.

The impact observations come as InSight nears the end of its mission because of dwindling power, its solar panels blanketed by dust storms. InSight landed on the equatorial plains of Mars in 2018 and has since recorded more than 1,300 marsquakes.

‘It´s going to be heartbreaking when we finally lose communication with InSight,’ said Bruce Banerdt of NASA´s Jet Propulsion Laboratory, the lander’s chief scientist who took part in the studies. ‘But the data it has sent us will certainly keep us busy for years to come.’

Banerdt estimated the lander had between four to eight more weeks before power runs out.

This combination of images made available by NASA on Thursday, Oct. 27, 2022, shows the site on Mars before and after a meteoroid hit the surface of the planet

Posiolova spotted the crater earlier this year after taking extra pictures of the region from orbit. The crater was missing from earlier photos, and after poring through the archives, she pinpointed the impact to late December. She remembered a large seismic event recorded by InSight around that time and with help from that team, matched the fresh hole to what was undoubtedly a meteoroid strike. The blast wave was clearly visible.

Scientists also learned the lander and orbiter teamed up for an earlier meteoroid strike, more than double the distance of the December one and slightly smaller.

‘Everybody was just shocked and amazed. Another one? Yep,’ she recalled.

The seismic readings from the two impacts indicate a denser Martian crust beyond InSight´s location.

‘We still have a long way to go to understanding the interior structure and dynamics of Mars, which remain largely enigmatic,’ said Doyeon Kim of ETH Zurich´s Institute of Geophysics in Switzerland, who was part of the research.

Outside scientists said future landers from Europe and China will carry even more advanced seismometers. Future missions will ‘paint a clearer picture’ of how Mars evolved, Yingjie Yang and Xiaofei Chen from China´s Southern University of Science and Technology in Shenzhen wrote in an accompanying editorial.

A separate study last month linked a recent series of smaller Martian meteoroid impacts with smaller craters closer to InSight, using data from the same lander and orbiter.

The discovery was only possible by data collected from the Insight lander that measured the seismic shocks and the Mars Reconnaissance Orbiter (pictured) provided stunning pictures of the resulting craters 

 The impact observations come as InSight (pictured) nears the end of its mission because of dwindling power, its solar panels blanketed by dust storms

The impact observations come as InSight nears the end of its mission because of dwindling power, its solar panels blanketed by dust storms. InSight landed on the equatorial plains of Mars in 2018 and has since recorded more than 1,300 marsquakes.

‘It´s going to be heartbreaking when we finally lose communication with InSight,’ said Bruce Banerdt of NASA´s Jet Propulsion Laboratory, the lander’s chief scientist who took part in the studies. ‘But the data it has sent us will certainly keep us busy for years to come.’

Banerdt estimated the lander had between four to eight more weeks before power runs out.

Posiolova spotted the crater earlier this year after taking extra pictures of the region from orbit. The crater was missing from earlier photos, and after poring through the archives, she pinpointed the impact to late December. 

She remembered a large seismic event recorded by InSight around that time and with help from that team, matched the fresh hole to what was undoubtedly a meteoroid strike. The blast wave was clearly visible.

Scientists also learned the lander and orbiter teamed up for an earlier meteoroid strike, more than double the distance of the December one and slightly smaller.

‘Everybody was just shocked and amazed. Another one? Yep,’ she recalled.

The seismic readings from the two impacts indicate a denser Martian crust beyond InSight´s location.

‘We still have a long way to go to understanding the interior structure and dynamics of Mars, which remain largely enigmatic,’ said Doyeon Kim of ETH Zurich´s Institute of Geophysics in Switzerland, who was part of the research.

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