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MSS/1: Single‐Station and Single‐Event Marsquake Inversion
Earth and Space Science ( IF 3.1 ) Pub Date : 2020-07-17 , DOI: 10.1029/2020ea001118
Mélanie Drilleau 1, 2 , Éric Beucler 3 , Philippe Lognonné 1 , Mark P. Panning 4 , Brigitte Knapmeyer‐Endrun 5 , W. Bruce Banerdt 4 , Caroline Beghein 6, 7 , Savas Ceylan 8 , Martin Driel 8 , Rakshit Joshi 9 , Taichi Kawamura 1 , Amir Khan 8, 10 , Sabrina Menina 1 , Attilio Rivoldini 11 , Henri Samuel 1 , Simon Stähler 8 , Haotian Xu 6 , Mickaël Bonnin 3 , John Clinton 8 , Domenico Giardini 8 , Balthasar Kenda 1 , Vedran Lekic 12 , Antoine Mocquet 3 , Naomi Murdoch 2 , Martin Schimmel 13 , Suzanne E. Smrekar 4 , Éléonore Stutzmann 1 , Benoit Tauzin 14, 15 , Saikiran Tharimena 4
Affiliation  

SEIS, the seismometer of the InSight mission, which landed on Mars on 26 November 2018, is monitoring the seismic activity of the planet. The goal of the Mars Structure Service (MSS) is to provide, as a mission product, the first average 1‐D velocity model of Mars from the recorded InSight data. Prior to the mission, methodologies have been developed and tested to allow the location of the seismic events and estimation of the radial structure, using surface waves and body waves arrival times, and receiver functions. The paper describes these validation tests and compares the performance of the different algorithms to constrain the velocity model below the InSight station and estimate the 1‐D average model over the great circle path between source and receiver. These tests were performed in the frame of a blind test, during which synthetic data were inverted. In order to propagate the data uncertainties on the output model distribution, Bayesian inversion techniques are mainly used. The limitations and strengths of the methods are assessed. The results show the potential of the MSS approach to retrieve the structure of the crust and underlying mantle. However, at this time, large quakes with clear surface waves have not yet been recorded by SEIS, which makes the estimation of the 1‐D average seismic velocity model challenging. Additional locatable events, especially at large epicentral distances, and development of new techniques to fully investigate the data, will ultimately provide more constraints on the crust and mantle of Mars.

中文翻译:

MSS / 1:单站和单事件Marsquake反演

SEIS是InSight任务的地震仪,于2018年11月26日降落在火星上,正在监测行星的地震活动。火星结构服务(MSS)的目标是从记录的InSight数据中提供火星的第一个平均一维速度模型作为任务产品。在执行任务之前,已经开发并测试了方法,以允许使用表面波和体波的到达时间以及接收器功能来定位地震事件并估算径向结构。本文介绍了这些验证测试,并比较了不同算法的性能,以约束InSight测站下方的速度模型并估算源与接收器之间大圆路径上的一维平均模型。这些测试是在盲测框架内进行的,在此期间,合成数据被倒置。为了在输出模型分布上传播数据不确定性,主要使用贝叶斯反演技术。评估了方法的局限性和优势。结果表明,MSS方法具有检索地壳和下地幔结构的潜力。但是,此时,SEIS尚未记录到具有清晰表面波的大地震,这使得对一维平均地震速度模型的估计具有挑战性。其他可定位事件,尤其是在大震中距离,以及开发新技术以全面调查数据,最终将对火星的地壳和地幔提供更多限制。主要使用贝叶斯反演技术。评估了方法的局限性和优势。结果表明,MSS方法具有检索地壳和下地幔结构的潜力。但是,此时,SEIS尚未记录到具有清晰表面波的大地震,这使得对一维平均地震速度模型的估计具有挑战性。其他可定位事件,尤其是在大震中距离,以及开发新技术以全面调查数据,最终将对火星的地壳和地幔提供更多限制。主要使用贝叶斯反演技术。评估了方法的局限性和优势。结果表明,MSS方法具有检索地壳和下地幔结构的潜力。但是,此时,SEIS尚未记录到具有清晰表面波的大地震,这使得对一维平均地震速度模型的估计具有挑战性。其他可定位事件,尤其是在大震中距离,以及开发新技术以全面调查数据,最终将对火星的地壳和地幔提供更多限制。SEIS尚未记录到具有清晰表面波的大地震,这使得一维平均地震速度模型的估计具有挑战性。其他可定位事件,尤其是在大震中距离,以及开发新技术以全面调查数据,最终将对火星的地壳和地幔提供更多限制。SEIS尚未记录到具有清晰表面波的大地震,这使得一维平均地震速度模型的估计具有挑战性。其他可定位事件,尤其是在大震中距离,以及开发新技术以全面调查数据,最终将对火星的地壳和地幔提供更多限制。
更新日期:2020-07-17
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