Infrasound detection of meteors

Gabry, Mohamed El; Korrat, Ibrahim; Hussein, H. M.; Hamama, Islam

doi:10.1016/j.nrjag.2017.04.004

Cited by 13 publications

(14 citation statements)

References 4 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The "slower" dIv (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) variations (shown in Figure 12d) correspond to medium-scale TIDs. Similarly to dIv (2)(3)(4)(5)(6)(7)(8)(9)(10) , the behavior of dIv (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) did not reveal disturbances during the previous days (not shown for the economy of space). In general, dIv (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) showed similar features of disturbances as dIv (2)(3)(4)(5)(6)(7)…”

Section: Ionospheric Response Registered By DIV Datamentioning

confidence: 78%

See 1 more Smart Citation

Assessment of Morelian Meteoroid Impact on Mexican Environment

et al. 2021

View full text Add to dashboard Cite

Possible ionospheric effects of the Morelian meteoroid that passed and exploded over Mexico on 19 February 2020 (18 February 2020 local time) were estimated. The meteoroid trajectory, velocity and time of occurrence were calculated based on outdoor camera records. Modeling was used to estimate the meteoroid initial diameter, density, mass, velocity, energy and their change during its flight in the atmosphere. The ensemble of ionospheric scintillation indices calculated from the high-rate GNSS data and the filtered slant Total Electron Content data were used to reveal the presence of ionospheric disturbances generated by shock waves excited by the meteoroid flight and explosion. The first ionospheric responses to phenomena accompanying the meteoroid were detected (2.5–3.5) min after the explosion. The disturbances were attenuated quickly with distance from their source and were rarely recorded by GNSS receivers located more than 600 km from the meteoroid explosion site. The ionospheric disturbances of intermediate-scale, small-scale, shock-acoustic-wave-scale and sometimes medium-scale were revealed. The detected disturbances corresponded to the range of acoustic-gravity waves. An asymmetry of the disturbance manifestation in different directions was observed. The obtained results are in accordance with results of the observation of other meteoroids. Although the object was smaller and of less energy than other known meteoroids, it is an interesting case because, to the best of our knowledge, it isthe first known to us low-latitude meteoroid with the detected ionospheric effects.

show abstract

Section: Ionospheric Response Registered By DIV Datamentioning

confidence: 78%

“…The flight and destruction of a meteoroid at stratospheric heights can cause infrasound waves. Acoustic waves provoked by a meteoroid can also transform into infrasound waves [2,4,8].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Morelian Meteoroid Impact on Mexican Environment

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Як відомо, техногенними джерелами інфразвукових хвиль є потужні вибухи [5][6][7][8][9], польоти ракет і великих літаків, космічних апаратів, що спускаються [10][11][12][13][14][15] та ін. До природних джерел інфразвукових хвиль відносяться морське хвилювання [16,17], землетруси [18], виверження вулканів [19][20][21][22][23][24], погодні фронти [25], полярні сяйва [26], падіння великих космічних тіл [4,5,[27][28][29][30][31][32][33][34][35][36][37][38][39][40], тайфуни [41,42] та ін.…”

Section: вступunclassified

Parameters of the Infrasonic Signal Generated in the Atmosphere by a Powerful Volcano Explosion

Chernogor

2020

PhAG

View full text Add to dashboard Cite

The purpose of this work is to represent the results of performing regression analysis to fit the distance and the amplitude of the infrasonic signal generated by the explosion of St. Helens volcano, and to estimate a few signal and atmospheric parameters. The pressure amplitude in the explosion wave generated at the beginning of St. Helens volcano eruption was measured at 13 stations in the 0.9 – 39-Mm distance range; based on these data, an attempt has been made to perform a regression analysis to fit amplitude and distance. The regression based on the assumption that the infrasound propagation takes place in a waveguide where it is subject to attenuation is determined to be the most preferable regression. Based on the observations of the shock from the St. Helens volcano eruption, the shock wave energy and mean power have been estimated to be ~1016 J and ~2.3 TW, respectively. Based on the observations of the amplitude and duration of the trains of the infrasonic wave generated by the St. Helens volcano eruption, the infrasonic wave energy and mean power have been estimated to be ~1016 J and ~2 TW, respectively. Both estimates are in good agreement, but they are significantly different from those found in the literature; the latter seem to be overestimated. From the regression expression obtained, the penetration depth of the infrasonic wave is obtained to be about 33 Mm, whereas at other stations this scale length is estimated to be close to 24 Mm. Based on the theoretical dependence of the attenuation coefficient due to atmospheric turbulence, the attenuation length of the infrasound wave has been estimated for infrasound with 10–300-s periods. For 20–300-s periods, this value has been shown to be significantly larger than the values determined from the observations. Other mechanisms for attenuating the infrasonic signal are discussed (the partial radiation of the infrasonic energy through and losses due to the reflection from the waveguide walls). At the same time, the wave attenuation due to their scattering by turbulent fluctuations can be significant for the periods smaller than 20–50 s, depending on the turbulence intensity. Comparison of the regression functions obtained with the corresponding regression expressions for other sources of infrasound waves propagating in the atmosphere has been made. Keywords: volcano eruption, infrasonic wave, shock wave, signal amplitude, regression, signal attenuation

show abstract

“…Infrasound can be defined as inaudible sound waves with a frequency range from 0.003 to 20 Hz [ 1 ]. Since the historical explosion of the Krakatoa volcano occurred in 1883 the importance of infrasound increased.…”

Section: Introductionmentioning

confidence: 99%

Infrasonic Earthquake Detectability Investigated in Southern Part of Japan, 2019

Hamama

Yamamoto

2021

Sensors

View full text Add to dashboard Cite

The Kochi University of Technology (KUT) Infrasound Sensor Network contains 30 infrasound sensors which are distributed all over Japan especially in Shikoku Island. At all infrasound stations installed with three-axis accelerometers to measure the peak ground acceleration (PGA). Many earthquakes were detected by our system after establishing of the network since 2016. In this study we will focus on all the possibilities for infrasound detection generated from earthquakes using KUT sensor network and International Monitoring system (IMS) stations for the earthquakes which were detected in southern part of Japan during 2019. As for earthquakes with strike-slip mechanisms the P-waves could not be detected by our sensors. In addition, The conversion from seismic to acoustic waves can be happened through the generating of the T-phase from oceanic earthquakes. On 9 May 2019, progressive multi-channel cross correlation (PMCC) method applied infrasound and hydroacoustic waves from two earthquakes happened in west of Kyushu Island as the T-phase was well-recorded at H11N station near Wake Island. Moreover, infrasound propagation modeling is applied to the reconstructed atmosphere profile by Ground to Space Model (AVO-G2S) to confirm the infrasound arrivals, furthermore the 3D ray tracing process and the calculations by using the transmission loss equation with normal modes and parabolic equation methods are investigated. The study confirmed the infrasound generation scenario from the T-phase of oceanic propagation.

show abstract

Infrasound detection of meteors

Abstract: Meteorites that penetrate the atmosphere generate infrasound waves of very low frequency content. These waves can be detected even at large distances. In this study, we analyzed the infrasound waves produced by three meteors.

Cited by 13 publications

References 4 publications

Assessment of Morelian Meteoroid Impact on Mexican Environment

Assessment of Morelian Meteoroid Impact on Mexican Environment

Parameters of the Infrasonic Signal Generated in the Atmosphere by a Powerful Volcano Explosion

Infrasonic Earthquake Detectability Investigated in Southern Part of Japan, 2019

Contact Info

Product

Resources

About