2022
DOI: 10.1093/gji/ggac230
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Three-dimensional topographic effects on infrasound propagation across Ascension Island

Abstract: Summary Narrowband harmonic infrasound signals within the 1 to 8 Hz passband, generated by wind turbines on Ascension Island, have been recorded at four microbarometers located at distances of between 1.8 and 4.6 km from the source along different azimuths. Across one month of recordings in October 2010, amplitude ratios between the four recordings show temporal stability but deviate from the ratios expected for propagation across a flat plane. Using a recently developed three-dimensional parabo… Show more

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Cited by 3 publications
(3 citation statements)
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“…The inclusion of the stochastic weather models allows us to quantify the infrasound variability due to the weather uncertainty. We include 3‐D surface topography which can greatly impacts infrasound signal amplitudes (Khodr et al., 2022; Kim & Lees, 2011; Maher et al., 2021). Finally, we compare our infrasound‐based yield estimates with seismic analysis, exploring joint seismoacoustic constraint of yield.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…The inclusion of the stochastic weather models allows us to quantify the infrasound variability due to the weather uncertainty. We include 3‐D surface topography which can greatly impacts infrasound signal amplitudes (Khodr et al., 2022; Kim & Lees, 2011; Maher et al., 2021). Finally, we compare our infrasound‐based yield estimates with seismic analysis, exploring joint seismoacoustic constraint of yield.…”
Section: Introductionmentioning
confidence: 99%
“…Massive blast waves caused devastating damage to the urban area including more than 6,500 casualties (Nemer, 2021). This explosion was one of the largest single-fired AN explosions documented in history (Guglielmi, 2020). The explosion generated seismic waves equivalent to a M3.3-3.6 earthquake (Guglielmi, 2020) with infrasonic waves detected at distances up to 6,240 km (Pilger et al, 2021).…”
mentioning
confidence: 99%
“…Although atmospheric models can be used to predict infrasound arrival patterns, unresolvable shorttime-scale atmospheric variability affects their accuracy 5 . Proximal infrasound, confined to the troposphere, experiences milder atmospheric path effects, but effects from topographic obstruction and diffraction can be noticeable 7 .…”
mentioning
confidence: 99%