Scientists have now discovered how it was created Internal structure of Tuesday. Find out all that reveals This article or section needs sources or references that appear in credible, third-party publications.
Listen to the whispers in the March air
Since 2019, scientists have been collecting and studying Adequate seismic data To determine Model of the internal structure of Mars. Medal A Tuesday year, Which is almost 2 Earth years old, International Mars Earthquake Service Team of NASA Insight Mission Data collected using First Mars seismometer: Cheese instrument.
From the beginning of the analyzes, almost 700 events listed, Including sixty Mars earthquakes A dozen is very different To determine Model of the internal structure of the red planet.
On Earth, earthquakes are strongest due to plate tectonics, on Mars, from sunrise, Seismic noise The large volume created by the atmosphere and its turbulence confirms it Earthquakes are much weaker than one might expect. So, for scientists, this is the equivalent of tryingListen to the gossip between hoops.
When the sun goes down Seismic noise decreases, And especially in the first part of the night, so much The Insight weather sensor can no longer measure air. In these few hours, Less than 3.7 magnitude earthquakes Even in the distance up Several thousand kilometers. In addition, there were some earthquakes “Signal to Noise Rate” In other words, an indicator of the quality of communication – Enough to extract information from it.
Finally, to determine it, note Structural model, The time of arrival of the earthquake and its distance, many stations are required. Now, on Mars, The Insight Station is only available to scientists. However, they were able to deal with the problem. By searching, identifying and verifying Seismic records Signature of waves containing Associated differently with the internal structures of Mars. In addition, these measures were cross-tested Mineral and thermal modeling of the internal structure. This time The real revolution for planetary earthquakes.
What made Mars?
In addition to the Earth and the Moon, The internal structure of Mars is finally known Thanks for the quake. Before the Insight mission, scientists calculated it ThicknessMars should be 30 to 100 kilometers away. With regard to the deep structure, they felt itThere must have been a fetus Its radius must be measured 1400 to 2000 km.
Articles published in the journal Science, Co-signed by Insight Collaborative and Concerned The Top tile, The Code, And this Core Of the red planet. The first article suggests Several pauses in the Mars overview. About a first 10 km deep, Indicates the section between Very modified system – effect of very old circulation of fluid – and Slightly altered crust. Below, there will be a slightly altered geographical structure The second stop is about 20 km, Then the third, less marked, About 35 km.
Because it worries Code, Scientists went beyond information Variations in the wave velocity generated directly by the earthquake And will be formed during the reflection of these direct waves on the surface. In fact, these differences make it possible to determine The structure of the upper shield of Mars. The results suggest The temperature of the mantle of the red planet increases with depth Until it reaches a little more than Depth of 1500 to 500 to 600 km.
The size of the nucleus of Mars Rated in between 1,790 km and 1,870 km in circumference. Also, representing such size Presence of light chemical components In the outer center of the liquid. But this type of size Excludes “Bridgemanite” layer from the bottom of the coat, It is iron magnesium silicate It is the main part of the Earth’s mantle at depths of 660 and 2,700 km.
Analysis of this event was carried out Philip Lochnoni, Professor of Geography and Planetarium At the Institute de Physique to the Globe in Paris. If you are interested in this article, you will definitely want to find out This photo of Mars was captured by Curiosity in unprecedented resolution.
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