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|Title:||Initial results from the InSight mission on Mars|
|Authors:||Banerdt, W. B.|
Johnson, C. L.
Collins, G. S.
García, R. F.
Garvin, J. B.
Irving, J. C. E.
Knapmeyer Endrun, B.
Maki, J. N.
McLennan, S. M.
Mueller, N. T.
Thomas Pike, W.
Plesa, A. C.
Rodríguez Manfredi, J. A.
Russell, C. T.
Van Driel, M.
Wieczorek, Mark A.
|Publisher:||Nature Research Journals|
|Citation:||Nature Geoscience 13: 183–189(2020)|
|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 indicate 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.|
|Description:||The data shown in the plots within this paper and other findings of this study are available from the corresponding authors W.B.B. or S.E.S. upon reasonable request. The InSight Mission raw and calibrated data sets are available via NASA’s Planetary Data System (PDS). Data are delivered to the PDS according to the InSight Data Management Plan available in the InSight PDS archive. All datasets can be accessed at https://pds-geosciences.wustl.edu/missions/insight/index.html. The InSight seismic event catalogue4 and waveform data3 are available from the IRIS-DMC and SEIS-InSight data portal (https://www.seis-insight.eu/en/science). Seismic waveforms as well as data from all other InSight instruments and MOLA topographic data are available from NASA PDS (https://pds.nasa.gov/). The terrestrial stations CH.DAVOX and CH.FIESA are part of the Swiss Seismic Network44. The data from these stations are accessible from the Incorporated Research Institutes for Seismology (IRIS) at https://www.iris.edu/hq.|
|Appears in Collections:||(CAB) Artículos|
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