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Numerama Simulation of the Atmospheric Signature of Artificial and Natural Seismic Events

Martire, Léo and Brissaud, Quentin and Lai, Voon Hui and Garcia, Raphaël F. and Martin, Roland and Krishnamoorthy, Siddharth and Komjathy, Attila and Cadu, Alexandre and Cutts, James A. and Jackson, Jennifer M. and Mimoun, David and Pauken, Michael T. and Sournac, Anthony Numerama Simulation of the Atmospheric Signature of Artificial and Natural Seismic Events. (2018) Geophysical Research Letters, 45 (21). 1-9. ISSN 0094-8276

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Official URL: https://doi.org/10.1029/2018GL080485

Abstract

The mechanical coupling between solid planets and their atmospheres enables seismically induced acoustic waves to propagate in the atmosphere. We numerically simulate this coupled system for two application cases: active seismic experiments (ASEs) and passive seismic experiments. A recent ASE (Krishnamoorthy et al., 2018, https://doi.org/10.1002/2018GL077481) observed the infrasonic signals produced by a seismic hammer. To measure the sensitivity of observations to seismic parameters, we attempt to reproduce the results from this experiment at short range by considering a realistic unconsolidated subsurface and an idealized rock-solid subsurface. At long range, we investigate the influence of the source by using two focal mechanisms. We found surface waves generate an infrasonic plane head wave in the ASE case of the rock-solid material. For the passive seismic experiments, the amplitude of atmospheric infrasound generated by seismic surface waves is investigated in detail. Despite some limitations, the simulations suggest that balloon measurement of seismically induced infrasound might help to constrain ground properties.

Item Type:Article
HAL Id:hal-01991143
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
French research institutions > Institut de Recherche pour le Développement - IRD (FRANCE)
Other partners > National Aeronautics and Space Administration - NASA (USA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > California Institute of Technology - Caltech (USA)
Laboratory name:
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Deposited By: Raphael Garcia
Deposited On:23 Jan 2019 15:28

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