Estimation of the Seismic Moment Release Rate of Mars from InSight Seismic Data

Knapmeyer, Martin ; Knapmeyer-Endrun, Brigitte ; Plesa, Ana-Catalina ; Böse, Maren ; Kawamura, Taichi ; Clinton, John ; Giardini, Domenico ; Golombek, Matt ; Kedar, Sharon ; Stähler, Simon(Eidgenossische Technische Hochschule (ETH), Zurich, Switzerland)

关键词: COMPUTATION;    ESTIMATING;    EVENTS;    FREQUENCY DISTRIBUTION;    MARS (PLANET);    MODELS;    PLANETARY QUAKES;    SEISMIC ENERGY;    SEISMOGRAPHS;    SIZE DISTRIBUTION;   

RP-ID  :  MSFC-E-DAA-TN67424

学科分类：天文学(综合)

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Seismicity models for Mars usually estimate the long-term average annual seismic moment rate, and also the average annual event rate. This holds for estimations based on geological evidence (Golombek et al., 1992, Golombek, 2002, Taylor et al., 2013) as well as for models based on thermal evolution and cooling of the Martian interior (Phillips, 1991, Knapmeyer et al., 2006, Plesa et al., 2018). All studies are compatible with the conclusion based on the non-observation of any unambiguous event by Viking (Anderson et al., 1977, Goins & Lazarewicz, 1979) that Martian seismicity lies somewhere between that of the Moon and that of the Earth. We developed tools to derive reasonable estimations of the annual seismic moment rate from a number of events as small as one, provided that the observed events are beyond the global completeness threshold for observable events. Numerical tests as well as evaluation of terrestrial data shows the feasibility of the approach.