The Global Seismic Moment Rate of Mars After Event S1222a

被引：9

作者：

Knapmeyer, M. ^{[1
]}

Stahler, S. ^{[2
]}

Plesa, A. -C. ^{[1
]}

Ceylan, S. ^{[2
]}

Charalambous, C. ^{[3
]}

Clinton, J. ^{[4
]}

Dahmen, N. ^{[2
]}

Duran, C. ^{[2
]}

Horleston, A. ^{[5
]}

Kawamura, T. ^{[6
]}

Kim, D. ^{[2
]}

Li, J. ^{[7
]}

Plasman, M. ^{[6
]}

Zenhausern, G. ^{[2
]}

Weber, R. C. ^{[8
]}

Giardini, D. ^{[2
]}

Panning, M. P. ^{[9
]}

Lognonne, P. ^{[6
]}

Banerdt, W. B. ^{[9
]}

机构：

[1] DLR Inst Planetary Res, Berlin, Germany

[2] Swiss Fed Inst Technol, Inst Geophys, Zurich, Switzerland

[3] Imperial Coll London, Dept Elect & Elect Engn, London, England

[4] Swiss Fed Inst Technol, Swiss Seismol Serv SED, Zurich, Switzerland

[5] Univ Bristol, Sch Earth Sci, Bristol, England

[6] Univ Paris, Inst Phys Globe Paris, CNRS, F-75005 Paris, France

[7] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA

[8] NASA MSFC, Huntsville, AL USA

[9] CALTECH, Jet Prop Lab, Pasadena, CA USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2023年 / 50卷 / 07期

基金：

美国国家航空航天局;

关键词：

Mars; InSight; seismic moment rate; S1222a;

D O I：

10.1029/2022GL102296

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The seismic activity of a planet can be described by the corner magnitude, events larger than which are extremely unlikely, and the seismic moment rate, the long-term average of annual seismic moment release. Marsquake S1222a proves large enough to be representative of the global activity of Mars and places observational constraints on the moment rate. The magnitude-frequency distribution of relevant Marsquakes indicates a b $b$-value of 1.06. The moment rate is likely between 1.55x1015Nm/a $1.55\times {10}<^>{15}\mathrm{N}\mathrm{m}/\mathrm{a}$ and 1.97x1018Nm/a $1.97\times {10}<^>{18}\mathrm{N}\mathrm{m}/\mathrm{a}$, with a marginal distribution peaking at 4.9x1016Nm/a $4.9\times {10}<^>{16}\mathrm{N}\mathrm{m}/\mathrm{a}$. Comparing this with pre-InSight estimations shows that these tended to overestimate the moment rate, and that 30% or more of the tectonic deformation may occur silently, whereas the seismicity is probably restricted to localized centers rather than spread over the entire planet.

引用

页数：9

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