Knapmeyer, Martin and Knapmeyer-Endrun, B. and Plesa, Ana-Catalina and Böse, M and Kawamura, T. and Clinton, John and Giardini, D. and Golombek, M. and Kedar, S. and Stähler, S. and Stevanovic, J. and Perrin, C. and Lognonne, P. and Teanby, N. and Weber, R. (2019) Estimation of the Seismic Moment Release Rate of Mars using InSight Seismic Data. 27th IUGG General assembly, 8.-18. Juli 2019, Montreal, Kanada.
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Abstract
After the first few months of InSight seismic recordings on Mars, we provide an early estimation of the Martian annual seismic moment release rate. The non-detection of unambiguous events by the Viking seismic experiment constrained the annual moment release rate of Mars to within ten orders of magnitude. Evaluation of visible tectonic structures, as well as geodynamic modeling provide further constraints to narrow down this interval to little more than three orders of magnitude. Assuming that the moment-frequency distribution of Marsquakes follows a distribution similar to that found on Earth and Moon, implying that most of the seismic moment is released in the few largest events, it is possible to estimate the global moment release rate from a small number of events above the completeness threshold of the event catalog. We developed statistical estimators based on the tapered Gutenberg Richter distribution which allow computing estimates with as few as one such event. Evaluation of several real catalogs for Earth and Moon, as well as of 560 million synthetic catalogs worth 2.5 billion years of seismicity, shows the feasibility of the approach. We implemented a Monte Carlo method which evaluates our estimators for Marsquakes recorded by InSight, propagates the uncertainty of the individual event’s magnitudes and finally infers how likely any given combination of distribution parameters reproduces the moment rate estimation to within the observational uncertainty. The resulting probabilities can then be used to challenge existing moment rate models.
Item URL in elib: | https://elib.dlr.de/130147/ | ||||||||||||||||||||||||||||||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||||||||||||||||||||||||||||||
Title: | Estimation of the Seismic Moment Release Rate of Mars using InSight Seismic Data | ||||||||||||||||||||||||||||||||||||||||||||||||
Authors: |
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Date: | 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||
Refereed publication: | No | ||||||||||||||||||||||||||||||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||||||||||||||||||||||
Keywords: | Mars, InSight, Seismologie | ||||||||||||||||||||||||||||||||||||||||||||||||
Event Title: | 27th IUGG General assembly | ||||||||||||||||||||||||||||||||||||||||||||||||
Event Location: | Montreal, Kanada | ||||||||||||||||||||||||||||||||||||||||||||||||
Event Type: | international Conference | ||||||||||||||||||||||||||||||||||||||||||||||||
Event Dates: | 8.-18. Juli 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||
Organizer: | International Union of Geodesy and Geophysics | ||||||||||||||||||||||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||||||||||||||||||||||||||
HGF - Program: | Space | ||||||||||||||||||||||||||||||||||||||||||||||||
HGF - Program Themes: | Space Science and Exploration | ||||||||||||||||||||||||||||||||||||||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||||||||||||||||||||||||||||||||||||||
DLR - Program: | R EW - Erforschung des Weltraums | ||||||||||||||||||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | Project InSight HP3 | ||||||||||||||||||||||||||||||||||||||||||||||||
Location: | Berlin-Adlershof | ||||||||||||||||||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Planetary Research > Planetary Physics | ||||||||||||||||||||||||||||||||||||||||||||||||
Deposited By: | Knapmeyer, Dr. Martin | ||||||||||||||||||||||||||||||||||||||||||||||||
Deposited On: | 06 Nov 2019 08:28 | ||||||||||||||||||||||||||||||||||||||||||||||||
Last Modified: | 06 Nov 2019 08:28 |
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