DI026-02
An Update on the Seismicity on Mars as seen from InSight
Tuesday, 15 December 2020: 10:08
Virtual
Savas Ceylan1, John F. Clinton2, Martin van Driel3, Domenico Giardini4, Simon C Staehler3, Maren Böse5, Constantinos Charalambous6, Nikolaj L Dahmen7, Anna C Horleston8, Taichi Kawamura9, Amir Khan3, Guenolé Orhand-Mainsant10, John-Robert Scholz11, Fabian Euchner12, William Bruce Banerdt13, Philippe Henri Lognonné14, Donald J Banfield15, Eric Beucler16, Raphael Garcia17, Sharon Kedar18, Mark P Panning19, Clement Perrin20, William T Pike21, Suzanne E Smrekar22, Aymeric Spiga23 and Alexander Stott21, (1)ETH Zurich Swiss Federal Institute of Technology Zurich, Zurich, Zurich, Switzerland, (2)ETH Swiss Federal Institute of Technology Zurich, Swiss Seismological Service, Zurich, Switzerland, (3)ETH Zurich, Department of Earth Sciences, Institute of Geophysics, Zurich, Switzerland, (4)Swiss Federal Institute of Technology (ETH), Zurich, Switzerland, (5)ETH Swiss Federal Institute of Technology Zurich, Swiss Seismological Service (SED), Zurich, Switzerland, (6)Imperial College London, London, SW7, United Kingdom, (7)ETH Swiss Federal Institute of Technology Zurich, Institute of Geophysics, Zurich, Switzerland, (8)University of Bristol, Bristol, United Kingdom, (9)Université de Paris, Institut de physique du globe de Paris, Paris, France, (10)Institut Supérieur de l'Aéronautique et de l'Espace, Toulouse Cedex 04, France, (11)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (12)ETH Zurich, Zurich, Switzerland, (13)JPL/NASA/Caltech, Pasadena, CA, United States, (14)Université de Paris, Institut de physique du globe de Paris, CNRS, Paris, France, (15)Cornell University, Center for Radiophysics and Space Research, Ithaca, NY, United States, (16)University of Nantes, Nantes, France, (17)Institut Supérieur de l'Aéronautique et de l'Espace, DEOS/SSPA, Toulouse Cedex 04, France, (18)JPL, Pasadena, CA, United States, (19)Univ of FL-Geological Sciences, Gainesville, FL, United States, (20)Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, France, (21)Imperial College London, London, United Kingdom, (22)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (23)LMD/IPSL, Sorbonne Université, Paris, France - Institut Universitaire de France, France, Palaiseau Cedex, France
Abstract:
The SEIS package on InSight has been collecting high quality seismic data on Mars since February 2019. Almost a full martian year of data has been collected so far. SEIS continues to be capable of resolving extremely small amplitude signals on Mars, in the absence of the microseismic energy observed on Earth. The Marsquake Service is a ground segment support group of InSight that creates and curates a seismicity catalogue for InSight. Despite SEIS being highly sensitive to local martian winds, hundreds of suspected teleseismic marsquakes have been recorded by MQS, a number of which are strong enough to be located. These events are characterised by long duration signals on the order of 10’s of minutes, with frequencies ranging from approximately 10s to over 10Hz. Event distances range from within a few degrees of the lander to about 100 degrees, with magnitudes spanning from Mw1.5 to 4.0. Further, a second class of very short duration events is regularly being identified that is likely due to local thermal cracking. This presentation provides an overview of the seismicity observed so far - describing the different signals characteristics and the temporal evolution of the seismicity.
