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Conference Paper

The Marsquake Service: Seismic monitoring on another planet

Authors

Clinton,  John
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Ceylan,  Savas
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Giardini,  Domenico
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Horleston,  Anna
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Kawamura,  Taichi
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Stahler,  Simon
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Charalambous,  Constantinos
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Dahmen,  Nikolaj
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Duran,  Cecilia
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Kim,  Doyeon
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zenhausern,  Geraldine
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Clinton, J., Ceylan, S., Giardini, D., Horleston, A., Kawamura, T., Stahler, S., Charalambous, C., Dahmen, N., Duran, C., Kim, D., Zenhausern, G. (2023): The Marsquake Service: Seismic monitoring on another planet, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3732


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020811
Abstract
For more than four years the Marsquake Service (MQS) detected and catalogued marsquakes from near realtime data recorded by SEIS, InSight’s seismometer deployed on the surface of Mars. Now that the data collection phase of the mission is over, we review the procedures and methods developed by MQS and describe the contents of the catalogue. With only a single station, there are obvious challenges in providing a catalogue for the entire planet. Due to the low SNR of marsquakes and the extreme variability of background noise, impulsive seismic signals are rarely evident and standard automated algorithms cannot be used to identify marsquakes, and manual review was needed. The MQS tools are based on best practice and standards used in seismic networks on Earth, for example we use a single station interactive analysis GUI based on SeisComP. Consistent procedures were developed to distinguish marsquakes from atmospheric noise or other data anomalies, classify events, pick phases, determine distance using a suite of Martian velocity models which has been updated during the mission, determine back azimuth, and locate events. Mars magnitudes are assigned using calibrated magnitude relations.. The final catalogue includes over 1300 marsquakes. Six events are known meteoroid impacts confirmed from visual imaging, their proximity to MQS locations confirms our location methodology. The catalogue contains quakes from within 1 degree of the lander out to 146 degrees distance and magnitudes span from 1 to 4.6. Body waves, crustal phases, surface waves, atmospheric shock waves and even core phases have been observed.