Using the normal-mode method of probing the infrasonic propagation for purposes of the comprehensive nuclear-test-ban treaty

Ponomarev, E. A.; Rudenko, G. V.; Sorokin, A. V.; Dmitrienko, I. S.; Lobycheva, I.Yu.; Baryshnikov, A.K.

doi:10.1016/j.jastp.2005.11.002

Cited by 10 publications

(6 citation statements)

References 20 publications

(16 reference statements)

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“…Since 1972 at Badary and Tory stations in the southwest of the Baikal Rift Zone, infrasonic oscillations of different nature have been recorded and studied [Erushchenkov et al, 1979;Sorokin, 1995;Ponomarev et al, 2006;Sorokin, Ponomarev, 2008;Sorokin, Lobycheva, 2011;Sorokin, 2016], but earthquakes as sources of infrasonic signals have not been identified until recently [Sorokin, Dobrynin, 2017]. Figure 1 presents a map of epicenters of 149 earthquakes with magnitude M LH ≥4, which occurred in the region from 1972 to 2014 and are a potential source of infrasonic waves.…”

Section: Earthquakes As Sources Of Infrasonic Waves In the Baikal Regionmentioning

confidence: 99%

Generation of infrasonic signals during earthquakes under Lake Hovsgool (Northern Mongolia) on December 5, 2014

Sorokin¹,

Ключевский²,

Klyuchevskii

et al. 2018

Solar-Terrestrial Physics

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The paper discusses the results of the detection of seismic and infrasonic waves generated by a major earthquake and its aftershock (the moment magnitude M W =4.9 and M W =4.2 respectively), which occurred in northern Mongolia under Lake Hovsgol on December 5, 2014. The joint analysis of waveforms of seismic and infrasonic oscillations has shown that the signal recorded by the infrasound station of the Geophysical Observatory of the Institute of Solar-Terrestrial Physics SB RAS (ISTP SB RAS) is formed from sources of three generation types: local, secondary, and epicentral. This analysis enables us to propose a hypothesis of generation of epicentral infrasonic signal by flexural waves in an elastic ice membrane on the surface of Lake Hovsgol, which appear during the passage of seismic wave packets. This hypothesis explains the similarity between seismic and epicentral infrasonic signals, negative initial phase of epicentral infrasonic waves, and detection of a weak signal after a small-magnitude aftershock.

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Section: Earthquakes As Sources Of Infrasonic Waves In the Baikal Regionmentioning

confidence: 99%

Generation of infrasonic signals during earthquakes under Lake Hovsgool (Northern Mongolia) on December 5, 2014

Sorokin¹,

Ключевский²,

Klyuchevskii

et al. 2018

Solar-Terrestrial Physics

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show abstract

“…It is also possible to satisfy the conditions of trap for the infrasonic waves higher the sound cutoff frequency. Dispersion of such modes has been analyzed in the WKB-approximation (see, for example, Ponomarev et. al.…”

Section: Lamb Wavesmentioning

confidence: 99%

Waveguide gravity disturbances in vertically inhomogeneous dissipative atmosphere

Rudenko,

Dmitrienko

2015

Preprint

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Trapped atmosphere waves, such as IGW waveguide modes and Lamb modes, are described using dissipative solution above source (DSAS) (Dmitrienko and Rudenko, 2016). Accordingly this description, the modes are disturbances penetrating without limit in the upper atmosphere and dissipating their energy throughout the atmosphere; leakage from a trapping region to the upper atmosphere is taken in consideration. The DSAS results are compared to those based on both accurate and WKB approximated dissipationless equations. It is shown that the spatial and frequency characteristics of modes in the upper atmosphere calculated by any of the methods are close to each other and are in good agreement with the observed characteristics of traveling ionospheric disturbances.

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“…Seeing that such waves can not be captured on their own in the upper atmosphere (approximately isothermal), the only way to explain the observation is to consider the waves as a result of propagation from a waveguide located at lower heights. A rigorous description of waveguide propagation in the real atmosphere (without accounting for dissipation) may be obtained, in principle, from the solution of a boundary problem for a wave equation which more completely accounts for the stratification of the real atmosphere (Ostashev (1997) ;Ponomarev et. al.…”

Section: Long-distance Disturbance Propagation In the Upper Atmospherementioning

confidence: 99%

Analyzing propagation of low-frequency dissipative oscillations in the upper atmosphere

Rudenko¹

2013

Preprint

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At a horizontally homogeneous isothermal atmosphere approximation, we derive an ordinary six-order differential equation describing linear disturbances with consideration for heat conductivity and viscosity of medium. The wave problem may be solved analytically by representing the solution through generalized hypergeometric functions only at a nonviscous heat-conducting isothermal atmosphere approximation. The analytical solution may be used to qualitatively analyze propagation of acoustic and internal gravity waves (AGWs) in the real atmosphere: a) to classify waves of different frequencies and horizontal scales according to a degree of attenuation and thus according to their ability to appear in observations and in general dynamics of the upper atmosphere; b) to describe variations in amplitude and phase characteristics of disturbances propagating in a height region with dominant dissipation; c) to analyze applicability of quasi-classical wave description to a medium with exponentially growing dissipation. In this paper, we also present wave and quasi-classical methods for deriving waveguide solutions (dissipative ones corresponding to a range of internal gravity waves (IGWs)) with consideration of wave leakage into the upper atmosphere. We propose a qualitative scheme which formally connects the wave leakage solution to the wave solution in the upper dissipative atmosphere. Spatial and frequency characteristics of dissipative disturbances generated by a waveguide leakage effect in the upper atmosphere are demonstrated to agree well with observed characteristics of middle-scale traveling ionospheric disturbances (TIDs).

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Using the normal-mode method of probing the infrasonic propagation for purposes of the comprehensive nuclear-test-ban treaty

Cited by 10 publications

References 20 publications

Generation of infrasonic signals during earthquakes under Lake Hovsgool (Northern Mongolia) on December 5, 2014

Generation of infrasonic signals during earthquakes under Lake Hovsgool (Northern Mongolia) on December 5, 2014

Waveguide gravity disturbances in vertically inhomogeneous dissipative atmosphere

Analyzing propagation of low-frequency dissipative oscillations in the upper atmosphere

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