Monitoring Seismicity on Mars - The Marsquake Service for Insight
Session: InSight Seismology on Mars: Results From the First (Earth) Year of Data and Prospects for the Future [Poster]
Type: Poster
Date: 4/28/2020
Time: 08:00 AM
Room: Ballroom
Description:
InSight landed on Mars in late November 2018, and the SEIS seismometer package was fully deployed by February 2019. By January 2020, SEIS continues to exceed performance expectations in terms of observed minimum noise. The Marsquake Service (MQS) has been setup to create and curate a seismicity catalogue for Mars over the lifetime of the InSight mission. Seismic waveforms are downloaded daily from the station and are analysed and processed by the MarsQuake Service, with the goal of detecting seismic vibrations not due to local ambient sources. To this end, every precaution is applied to eliminate possible non-seismic sources, such as noise induced by atmospheric phenomena, lander vibrations and orbiter activity. At the date of submission, we have detected 365 events, of different quality and SNR levels. Signal amplitudes remain small and signal can generally only be detected at night. Some events show only low-frequency waves in the 1-10 sec band, others have a high-frequency content up to several Hz, and others have a more broad-band character. A special class of events involves the excitation of a very prominent ambient vibration at 2.4Hz. Despite the scattered nature of the energy, in many cases, distinct phases can be inferred in the waveforms. Body wave character and back-azimuth can only be confirmed for 3 broadband events so far. The MQS approach for determining distances from broadband events identifies phases as mantle P and S-phases and uses an a priori set of several thousand martian models, derived from geophysical, mineralogical and orbital constraints. High frequency events are currently located assuming phases are trapped crustal Pg and Sg and using a simple crustal layer. The MQS consists of an international team of seismologists that screen incoming data to identify and characterise any seismicity. In this presentation, we present the MQS, demonstrate how we detect and characterise marsquakes and describe the challenges we face dealing with the Martian dataset.
Presenting Author: John Clinton
Authors
John Clinton jclinton@sed.ethz.ch ETH Zürich, Zürich, , Switzerland Presenting Author
Corresponding Author
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Domenico Giardini domenico.giardini@erdw.ethz.ch ETH Zürich, Zürich, , Switzerland |
Savas Ceylan savas.ceylan@erdw.ethz.ch ETH Zürich, Zurich, , Switzerland |
Martin van Driel vandriel@erdw.ethz.ch ETH Zürich, Zürich, , Switzerland |
Simon Stähler simon.staehler@erdw.ethz.ch ETH Zürich, Zürich, , Switzerland |
William B Banerdt william.b.banerdt@jpl.nasa.gov Jet Propulsion Laboratory, Caltech, Pasadena, California, United States |
Don Banfield banfield@astro.cornell.edu Cornell, Itaca, New York, United States |
Eric Beucler eric.beucler@univ-nantes.fr University of Nantes, Nantes, , France |
Maren Böse maren@sed.ethz.ch ETH Zürich, Zürich, , Switzerland |
Constantinos Charalambous constantinos.charalambous05@imperial.ac.uk Imperial College London, London, , United Kingdom |
Fabian Euchner fabian@sed.ethz.ch ETH Zürich, Zürich, , Switzerland |
Raphael Garcia raphael.garcia@isae-supaero.fr ISAE, Toulouse, , France |
Anna C Horleston anna.horleston@bristol.ac.uk University of Bristol, Bristol, , United Kingdom |
Taichi Kawamura kawamura@ipgp.fr Institut de Physique du Globe de Paris, Paris, , France |
Sharon Kedar sharon.kedar@jpl.nasa.gov Jet Propulsion Laboratory, Caltech, Pasadena, California, United States |
Amir Khan amir.khan@erdw.ethz.ch ETH Zürich, Zürich, , Switzerland |
Philippe Lognonne lognonne@ipgp.fr Institut de Physique du Globe de Paris, Paris, , France |
Guenole Mainsant guenole.orhand-mainsant@isae-supaero.fr ISAE, Toulouse, , France |
Mark P Panning mark.p.panning@jpl.nasa.gov Jet Propulsion Laboratory, Caltech, Pasadena, California, United States |
Clément Perrin perrin@ipgp.fr Institut de Physique du Globe de Paris, Paris, , France |
William T Pike w.t.pike@imperial.ac.uk Imperial College London, London, , United Kingdom |
John-Robert Scholz scholz@mps.mpg.de MPG, Berlin, , Germany |
Suzanne E Smrekar suzanne.e.smrekar@jpl.nasa.gov Jet Propulsion Laboratory, Caltech, Pasadena, California, United States |
Aymeric Spiga aymeric.spiga@lmd.jussieu.fr Sorbonne, Paris, , France |
Monitoring Seismicity on Mars - The Marsquake Service for Insight
Category
Insight Seismology on Mars: Results From the First (Earth) Year of Data and Prospects for the Future