Numerical modeling of the infrasonic and seismic waves propagation in the “Earth-Atmosphere” model with a curvilinear interface

Михайлов, А. В.; Martynov, V. N.

doi:10.1063/1.5012658

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…The coupling of surface displacements with the atmosphere results in the generation of AGWs, which propagate with velocities and amplitudes that depend on background state conditions (Bergmann, 1946;Mikhailov & Martynov, 2017). They can reach considerably high amplitudes in thermosphere; nonlinear effects of AW propagation in the near-epicentral region leads to the formation of shock waves.…”

Section: Atmosphere-ionosphere Response Simulation Resultsmentioning

confidence: 99%

Modeling of Ionospheric Responses to Atmospheric Acoustic and Gravity Waves Driven by the 2015 Nepal 7.8 Gorkha Earthquake

et al. 2020

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Near-and far-field ionospheric responses to atmospheric acoustic and gravity waves (AGWs) generated by surface displacements during the 2015 Nepal M w 7.8 Gorkha earthquake are simulated. Realistic surface displacements driven by the earthquake are calculated in three-dimensional forward seismic waves propagation simulation, based on kinematic slip model. They are used to excite AGWs at ground level in the direct numerical simulation of three-dimensional nonlinear compressible Navier-Stokes equations with neutral atmosphere model, which is coupled with a two-dimensional nonlinear multifluid electrodynamic ionospheric model. The importance of incorporating earthquake rupture kinematics for the simulation of realistic coseismic ionospheric disturbances (CIDs) is demonstrated and the possibility of describing faulting mechanisms and surface deformations based on ionospheric observations is discussed in details. Simulation results at the near-epicentral region are comparable with total electron content (TEC) observations in periods (∼3.3 and ∼6-10 min for acoustic and gravity waves, respectively), propagation velocities (∼0.92 km/s for acoustic waves) and amplitudes (up to ∼2 TECu). Simulated far-field CIDs correspond to long-period (∼4 mHz) Rayleigh waves (RWs), propagating with the same phase velocity of ∼4 km/s. The characteristics of modeled RW-related ionospheric disturbances differ from previously-reported observations based on TEC data; possible reasons for these differences are discussed.

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Section: Atmosphere-ionosphere Response Simulation Resultsmentioning

confidence: 99%

Modeling of Ionospheric Responses to Atmospheric Acoustic and Gravity Waves Driven by the 2015 Nepal 7.8 Gorkha Earthquake

et al. 2020

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Mathematical simulation of acoustic waves propagation through forest layer onto ground

Voskoboynikova

Karavaev

Kovalevsky

et al. 2018

AIP Conference Proceedings

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In this paper, aspects of the numerical modeling of acoustic waves propagation in 2D inhomogeneous model "atmosphere-forest layer-ground" are considered. The linear damping function was introduced into the main acoustic equations. This function characterizes the energy dissipation of the acoustic waves propagating in the forest layer. The problem of the interaction of acoustic waves falling onto the ground covered by the forest layer and seismic waves arising in the ground are considered. The influence of the forest layer on the amplitudes of acoustic waves and seismic waves excited in the ground was investigated. An influence of damping coefficient on the rate of acoustic oscillations attenuation in the forest was estimated. The algorithm and the program for calculation the acoustic pressure levels in different media using the wave equation for the atmosphere, Euler's gas dynamics equations for forest, and the elasticity equation for the ground have been developed and implemented. The results of numerical experiments as instantaneous snapshots of the wave field were presented.

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Mathematical Simulation of Infrasonic Waves Propagation Through Vegetation into Ground

Khairctdinov

Voskoboynikova

Kovalevsky

2018

2018 XIV International Scientific-Technical Conference on Actual Problems of Electronics Instrument Engineering (APEIE)

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Numerical modeling of the infrasonic and seismic waves propagation in the “Earth-Atmosphere” model with a curvilinear interface

Cited by 3 publications

References 8 publications

Modeling of Ionospheric Responses to Atmospheric Acoustic and Gravity Waves Driven by the 2015 Nepal 7.8 Gorkha Earthquake

Modeling of Ionospheric Responses to Atmospheric Acoustic and Gravity Waves Driven by the 2015 Nepal 7.8 Gorkha Earthquake

Mathematical simulation of acoustic waves propagation through forest layer onto ground

Mathematical Simulation of Infrasonic Waves Propagation Through Vegetation into Ground

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