2020-2030. A Golden Decade for Very Broad Band Planetary Seismology and Seismic Imaging of Mars and Moon Interiors
The Mars NASA InSight mission re-started seismology in planetary science, 40 years after Apollo and Viking.
SEIS, InSight’s French led international seismometer, operated from 2/2019 to 12/2022. Thanks to its ground installation and wind shielding, the very-broad-band (VBB) sensors of SEIS achieved ultra-low noise levels during the first half of the night. This enabled a very low detection threshold, down to moment magnitude MW=1 regionally and 4 on a global scale.
More than 1300 events during the 4 years of operation were detected by the MarsQuake Service from VBB data, including a MW =4.7 marsquake that excited surface waves and likely normal modes. Eight impacts were also confirmed by orbital crater imaging, two with MW =4 and very large craters. Nearly half of the events were located near Cerberus Fossae, where possibly volcanic seismo-tectonics is ongoing.
Through these seismic events, SEIS provided the first seismic models of Mars, from the 40 km thick crust beneath InSight down to the core. These models revealed the stratigraphy of the crust, including through surface wave anisotropy, the structure and thickness of the thermal lithosphere and the presence of a molten silicate layer at the bottom of the mantle beneath a partially molten layer. Comparisons of these Martian interior and seismic properties with those of the Moon and Earth, obtained from Apollo and Earth seismic networks, are now possible, opening a new research field: comparative planetary seismology
And SEIS will continue its journey to the Moon with the JPL/CNES/IPGP Farside Seismic Suite, which will deploy in 2026 one of the spare sensors of InSight VBBs in the farside Schrödinger basin. FSS will operate this vertical VBB with performance at 1 Hz more than 10x better the Apollo seismometers. Data will be processed by the FSS LunarQuake Service and will be completed by Earth based impact flash monitoring. We therefore conclude with the science goals of this new mission in terms of deep interior imaging, as well as perspectives in terms of global seismic network on the Moon, if complemented by other missions deploying seismometers.
Session: Earth’s Structure from the Crust to the Core - III
Type: Oral
Room: Tikahtnu Ballroom E/F
Date: 5/1/2024
Presentation Time: 03:00 PM (local time)
Presenting Author: Philippe Lognonné
Student Presenter: No
Additional Authors
Philippe Lognonné Presenting Author Corresponding Author lognonne@ipgp.fr Université Paris Cité |
Mark Panning mark.p.panning@jpl.nasa.gov Jet Propulsion Laboratory |
William Banerdt wbruce@banerdt.net Jet Propulsion Laboratory |
Savas Ceylan savas.ceylan@erdw.ethz.ch Eidgenössische Technische Hochschule Zürich |
John Clinton jclinton@sed.ethz.ch Eidgenössische Technische Hochschule Zürich |
Marco Delbo delbo@oca.eu Observatoire de la Côte d'Azur |
Sébastien de Raucourt deraucourt@ipgp.fr Université Paris Cité |
Mélanie Drilleau melanie.drilleau@isae.fr Institut de l'Aéronautique et de l'Espace |
Raphael Garcia raphael.garcia@isae-supaero.fr Institut de l'Aéronautique et de l'Espace, Sup-Aéro |
Domenico Giardini domenico.giardini@erdw.ethz.ch Eidgenössische Technische Hochschule Zürich, Zürich, , Switzerland |
Taichi Kawamura kawamura@ipgp.fr Université Paris Cité, Paris, , France |
Brigitte Knapmeyer-Endrun brigitte.knapmeyer-endrun@dlr.de Deutsches Zentrum für Luft- und Raumfahrt, Köln, , Germany |
Doyeon Kim doyeon.kim@imperial.ac.uk Imperial College London, London, , United Kingdom |
Ceri Nunn ceri.nunn@jpl.nasa.gov Jet Propulsion Laboratory, Pasadena, California, United States |
William T Pike w.t.pike@imperial.ac.uk Imperial College, London, , United Kingdom |
Simon Stähler simon.staehler@erdw.ethz.ch ETH Zurich, Zürich, , Switzerland |
Henri Samuel samuel@ipgp.fr Université Paris Cité, Paris, , France |
2020-2030. A Golden Decade for Very Broad Band Planetary Seismology and Seismic Imaging of Mars and Moon Interiors
Category
Earth’s Structure from the Crust to the Core
Description