Numerical Simulation of the Atmospheric Signature of Artificial and Natural Seismic Events - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2018

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

Résumé

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.

Domaines

Autre
Fichier principal
Vignette du fichier
Martire_21700.pdf (1.83 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01991143 , version 1 (23-01-2019)

Identifiants

Citer

Léo Martire, Quentin Brissaud, Voon Hui Lai, Raphaël F. Garcia, Roland Martin, et al.. Numerical Simulation of the Atmospheric Signature of Artificial and Natural Seismic Events. Geophysical Research Letters, 2018, 45 (21), pp.1-9. ⟨10.1029/2018GL080485⟩. ⟨hal-01991143⟩
49 Consultations
85 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More