• Accueil
  • Contactez nous

  • Financer
  • Divertissement
  • Science
  • Sport
  • Monde
  • Médecine
  • France
  • Local

Earth's moon is shrinking and quaking, study says

  • par Amanda Heroux
  • dans Science
  • — Déc 1, 2019
Partager:

NASA officials presented an updated budget request to the US Congress this Monday.

While the seismometer data has been held for decades, combining it with the LRO Mission mapping is new.

Astronauts placed five seismometers on the moon's surface during the Apollo 11, 12, 14, 15 and 16 missions. While these seismometers have long since gone silent, they returned up to eight years of data while active. In the process, they recorded 28 shallow moonquakes.

Of the 28 moonquakes measured, the team found at least eight were caused by true tectonic activity, with an equivalent natural disaster magnitude of about 2 to 5.

A new paper in Nature Geoscience discusses these findings, which could collectively demonstrate that the Moon is not, in fact, a geologically dead world. The orbiter was able to snap a shot of the impact zone, and by digging through the LROC photo archive from 2016, researchers were able to put together and post a before and after image of the location.

Eight moonquakes were discovered to have epicenters within 19 miles (31 km) of geological formations called thrust faults. Analytical modelling of tidal forces that contribute to the current lunar stress state indicates that seven near-apogee events within 60km of a fault scarp occur at or near the time of peak compressional stresses, when fault slip events are most likely. And as it shrinks, the moon actively produces moonquakes along the faults.

  • Georgia’s George Pickens ejected for fighting vs. Georgia Tech

The timing of the moonquakes was also important: numerous quakes occurred when the Moon was at or near its apogee - the furthest point in its orbit from Earth - when the tidal stresses on the rocky orb are at their highest.

"We have to figure out how small rocky bodies like the Moon can retain their interior heat over billions of years". Two are associated with vibrations originating underground - deep and shallow ones - another is due to vibrations from the impact of meteorites and the last variety are thermal quakes; these are formed after the Moon has undergone two weeks of freezing nights and is then subsequently warmed by the morning Sun, causing the surface layers to expand.

Beresheet's impact site appears as a "white impact halo" in the new image from the Lunar Reconnaissance Orbiter (LRO), NASA officials said in a statement.

Of the eight moonquakes that occurred close to visible thrust faults in the LRO data, six took place when the Moon was at its most distant orbital point relative to the Earth.

As a result, the moon has become about 150 feet (50 meters) "skinnier" over the past several hundred million years. This shrinkage creates "wrinkles" on the Moon's skin, except the rock isn't flexible. Eventually, it breaks, forming thrust faults. This shrinking is causing wrinkles in the crust of the moon, and it is, in turn, resulting in the rise of seismic activities. But the lunar faults, like Earth fault lines, are similar in that they're where pieces of the surface sometimes rub against each other, causing quakes that can reverberate throughout the planet.

Rumblings under the lunar surface captured by Apollo-era equipment may be a sign that the Moon is still tectonically active, researchers say.

Partager:

DANS LE CAS OÙ VOUS L'AVEZ MANQUÉ

  • Shoppers turned to their computers for Black Friday sales
  • Pakistan in trouble again as Warner hits double century in 2nd Test
  • 149 agences de voyage Thomas Cook
  • TU POURRAIS AUSSI AIMER...

    • Sydney Engulfed in 'Extremely' Hazardous Smoke as Raging Bushfires Intensify 12/13/2019
    • Mike Norvell's contract details released by FSU 12/13/2019
    • The fastest comets ever striking through our solar system 12/13/2019
    • La Xbox Scarlett devient la Xbox Series X, en images — Game Awards 12/13/2019
    • Biology: Genetic 'clock' predicts lifespan in vertebrates 12/13/2019
    • Votre Téléphone et Windows 10 : les appels disponibles pour tous avec Android 12/13/2019
    • Elle découvre l'infidélité de son compagnon grâce... à sa montre connectée 12/13/2019
    • La reconnaissance des mains pour cette semaine — Oculus Quest 12/13/2019
    • Le plus puissant des Mac Pro coûte plus de 60.000 euros 12/13/2019
    • Resident Evil Resistance présente l'un de ses "appétissants" survivants 12/13/2019

NOUVELLES CONNEXES

‘Frozen 2’, ‘Knives Out’ to Defrost Thanksgiving Box Office
Additionally, Frozen II only scored a 75 on Rotten Tomatoes , which is 15 points lower than the original's rating. The overall 2019 North American box office is down roughly 7% compared to the same point previous year .
12/01/2019

There is absolute clarity on Dhoni's future - Ganguly
He also said that there is ample time to answer the questions surrounding the veteran's future. He recently told the journalists not to ask him about his future until January.
12/01/2019

Missoula Downtown prepares for Small Business Saturday
Although Small Business Saturday is pretty much done, that doesn't mean you should stop shopping locally. Main St.in downtown Belleville. "They're realistically coming in and helping to support us being here".
12/01/2019

Plane crash kills nine, injures three in South Dakota
Rossow also said that first responders and medical professionals worked to rescue the victims in "extreme weather conditions". Knudson says the NTSB will investigate the crash, but inclement weather in the area is making travel to the site hard .
12/01/2019

Ariana Grande spends the first thanksgiving in 18 years with both parents
By the look of the pictures, it seems Ariana had the best Thanksgiving with her parents. "It took me so long to agree with that". In addition to pics surfacing on social media, Ariana also gave her dad a shout-out in " Thank U, Next " a year ago .
12/01/2019

Liverpool boss Klopp: We must find way to handle Fabinho, Matip absences
We showed a lot of personality, a lot of courage and a lot of quality against a really, really good team. It makes us a bit more unpredictable but it's nothing I really think about.
12/01/2019

Justin Timberlake et Jessica Biel séparés? Le couple répond
Justin Timberlake trompe-t-il Jessica Biel? "Ils surmonteront tout ça, leur couple survivra". Lundi 25 novembre 2019, le site E! News a finalement révélé ce qui se tramait en coulisses.
12/01/2019

National Weather Services Issues Winter Storm Watch
Anywhere from 3 to 6 inches of snow is predicted South of that until what appears to be Mercer and Middlesex counties. That's the likely area for up to a quarter inch of ice to develop in the line where rain is transitioning to snow.
12/01/2019

Canadian town Asbestos is changing its name due to 'bad connotations'
Canada was a latecomer, exclusively banning its manufacture, import, use and export final 12 months. With the product being the main economic driver the town itself had always been named Asbestos.
12/01/2019

Town adds glitz at wedding reception of Sooraj Barjatya's son
The "Kabir Singh" star was all smiles as he posed in his black t-shirt paired with gold shimmery coat and pants . Salman Khan looked dapper in Black suit, the actor even posted with newlywed young couple.
12/01/2019

Oil prices to average $62.50 in 2020 as oversupply to persist
Brent crude futures settled down US$1.44 at US$62.43 a barrel, and was down 1.5 per cent on the week. A Reuters survey on Opec output indicates that total Opec output fell by 110,000 bpd in November.
12/01/2019

Iowa Defeats Nebraska 27-24 on Late Field Goal
He essentially took three attempts at kicking the field goal after Scott Frost attempted to ice him twice. After the game, Duncan was awarded a scholarship by the coaching staff.
12/01/2019

Vancouver climate protests create spectacle during Black Friday rush
Vancouver police have arrested three climate change protesters holding a "funeral procession" in downtown Vancouver on Friday. In October, the group took over the Burrard Street Bridge for about 12 hours, leading police to arrest 10 demonstrators.
12/01/2019

Disney screens 'Star Wars: The Rise of Skywalker' for dying British superfan
The only way I can describe this to you is to say that this must be what it feels like to be told you have won a million pounds'. Star Wars: The Rise of Skywalker will open worldwide December 20, with previews December 19.
12/01/2019

Liverpool's Alisson Sent Off For Handling Outside The Box Against Brighton
Adam Webster was comfortably beaten by Van Dijk for the first goal and the Dutchman got ahead of Dunk easily six minutes later. Now, Manchester City could very well be out of the title race already, as Liverpool look set to run away with it.
12/01/2019

    • Top choix

      • Sydney Engulfed in 'Extremely' Hazardous Smoke as Raging Bushfires Intensify12/13/2019
      • Mike Norvell's contract details released by FSU12/13/2019
      • The fastest comets ever striking through our solar system12/13/2019
      • La Xbox Scarlett devient la Xbox Series X, en images — Game Awards12/13/2019
    • Nouvelles hebdomadaires

      • Biology: Genetic 'clock' predicts lifespan in vertebrates12/13/2019
      • Elle découvre l'infidélité de son compagnon grâce... à sa montre connectée12/13/2019
      • La reconnaissance des mains pour cette semaine — Oculus Quest12/13/2019
      • Le plus puissant des Mac Pro coûte plus de 60.000 euros12/13/2019
    • Dernières nouvelles

      • Blue Origin launches, lands same rocket record 6 times12/13/2019
      • Final full moon of 2019 -- will it bring cooler weather?12/12/2019
      • NASA finds water ice just below the surface of Mars12/12/2019
      • Final full moon of the decade in Gemini and Geminid meteor shower12/12/2019
    • Accueil
    • Contactez nous

    Vendredi 13 Décembre 2019

    © 2019 . TOUS LES DROITS SONT RÉSERVÉS.