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InSight lander detects most powerful marsquake yet – Astronomy Now
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NASA's InSight Finds Three Big Marsquakes, Thanks to Solar-Panel Dusting – NASA's Mars Exploration Program
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Spaceflight Insider
Theresa Cross
August 2nd, 2021
NASA’s InSight lander deployed its Wind and Thermal Shield on sol 66 Feb. 2, 2019. The shield covers the lander’s seismometer, which was set down onto the Martian surface on Dec. 19, 2018. Over 2.5 years later, data from the seismometer have shown Mars’ center to be molten. Credit: NASA/JPL-Caltech
Using data collected by NASA’s Mars InSight lander, which has been on the red planet since 2018, researchers have confirmed the planet’s center to be molten.
This comes from three papers published in “Science” on July 22, 2021, that used data collected by InSight’s seismometer to provide details previously unknown about the composition of Mars’ crust, mantel and core, confirming the planet has a molten center, whereas Earth’s outer core is molten and its center is solid.
What InSight found out was that Mars has a rather thin and layered crust. Under that lies a thick mantle and that literal hell of a core. The SEIS (Seismic Experiment for Interior Structure) data went into such depth that researchers actually published three studies in
Science one each for the crust, mantle and core and a fourth that goes into the overall composition of Martian innards.
“Seismic waves are a great tool to tell you about the interior of a planet,” researcher Bridgitte Knapmeyer-Enddrun, who led the crust study, tells SYFY WIRE. “They travel through the planet and on their way from the source of the quake to the seismometer, where they are recorded, and pick up information on the materials they are traveling through.
Thu 29 Jul 2021 01.00 EDT
Nasaâs InSight lander has revealed the depth of Marsâs crust and the size of its central core by using data from dozens of marsquakes captured since the probe landed in 2018.
The Seismic Experiment for Interior Structure (SEIS) is a dome-shaped instrument that sits on the surface of Mars and can pick up seismic events hundreds or even thousands of miles away. Since its deployment, the mission has recorded 733 distinct marsquakes, about 35 of which were used for the current work. All quakes registered between magnitudes 3 and 4.
Their analysis shows that the Martian crust is between 12 and 23 miles (20-37km) thick. Below this is the mantle, which extends about 970 miles down to the Martian core, which has been revealed to have a radius of 1,137 miles.
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