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Initial results from the InSight mission on Mars

Banerdt, W. Bruce and Smrekar, Suzanne E. and Banfield, Don and Giardini, Domenico and Golombek, Matthew and Johnson, Catherine L. and Lognonné, Philippe and Spiga, Aymeric and Spohn, Tilman and Perrin, Clément and Stähler, Simon C. and Antonangeli, Daniele and Asmar, Sami and Beghein, Caroline and Bowles, Neil and Bozdag, Ebru and Chi, Peter and Christensen, Ulrich and Clinton, John and Collins, Gareth S. and Daubar, Ingrid and Dehant, Véronique and Drilleau, Mélanie and Fillingim, Matthew and Folkner, William and Garcia, Raphaël F. and Garvin, Jim and Grant, John and Grott, Matthias and Grygorczuk, Jerzy and Hudson, Troy and Irving, Jessica C. E. and Kargl, Günter and Kawamura, Taichi and Kedar, Sharon and King, Scott and Knapmeyer-Endrun, Brigitte and Knapmeyer, Martin and Lemmon, Mark and Lorenz, Ralph and Maki, Justin N. and Margerin, Ludovic and McLennan, Scott M. and Michaut, Chloe and Mimoun, David and Mittelholz, Anna and Mocquet, Antoine and Morgan, Paul and Mueller, Nils T. and Murdoch, Naomi and Nagihara, Seiichi and Newman, Claire and Nimmo, Francis and Panning, Mark and Pike, W. Thomas and Plesa, Ana-Catalina and Rodriguez, Sébastien and Rodriguez-Manfredi, Jose Antonio and Russell, Christopher T. and Schmerr, Nicholas and Siegler, Matt and Stanley, Sabine and Stutzmann, Eléanore and Teanby, Nicholas and Tromp, Jeroen and van Driel, Martin and Warner, Nicholas and Weber, Renee and Wieczorek, Mark Initial results from the InSight mission on Mars. (2020) Nature Geoscience, 13 (3). 183-189. ISSN 1752-0894

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Official URL: https://doi.org/10.1038/S41561-020-0544-Y

Abstract

NASA’s InSight (Interior exploration using Seismic Investigations, Geodesy and Heat Transport) mission landed in Elysium Planitia on Mars on 26 November 2018. It aims to determine the interior structure, composition and thermal state of Mars, as well as constrain present-day seismicity and impact cratering rates. Such information is key to understanding the differentiation and subsequent thermal evolution of Mars, and thus the forces that shape the planet’s surface geology and volatile processes. Here we report an overview of the first ten months of geophysical observations by InSight. As of 30 September 2019, 174 seismic events have been recorded by the lander’s seismometer, including over 20 events of moment magnitude Mw = 3–4. The detections thus far are consistent with tectonic origins, with no impact-induced seismicity yet observed, and indi- cate a seismically active planet. An assessment of these detections suggests that the frequency of global seismic events below approximately Mw = 3 is similar to that of terrestrial intraplate seismic activity, but there are fewer larger quakes; no quakes exceeding Mw = 4 have been observed. The lander’s other instruments—two cameras, atmospheric pressure, temperature and wind sensors, a magnetometer and a radiometer—have yielded much more than the intended supporting data for seismometer noise characterization: magnetic field measurements indicate a local magnetic field that is ten-times stronger than orbital estimates and meteorological measurements reveal a more dynamic atmosphere than expected, hosting baroclinic and gravity waves and convective vortices. With the mission due to last for an entire Martian year or longer, these results will be built on by further measurements by the InSight lander.

Item Type:Article
HAL Id:hal-02641353
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
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Funders:
CNES - ANR
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Deposited On:28 May 2020 12:11

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