2020
DOI: 10.3390/atmos11010083
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Global Monitoring and Characterization of Infrasound Signatures by Large Fireballs

Abstract: Large meteoroids can be registered in infrasound recordings during their entry into the Earth’s atmosphere. A comprehensive study of 10 large fireball events of the years 2018 and 2019 highlights their detection and characterization using global infrasound arrays of the International Monitoring System (IMS) of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). The study focuses on the observation and event analysis of the fireballs to estimate their respective location, yield, trajectory, and entry behavior. Si… Show more

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Cited by 22 publications
(15 citation statements)
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“…The data analyzed by us did not allow us to compute the bolide energy. Nevertheless, Pilger et al (2020) obtained 50 kt TNT from infrasonic data, significantly less than the 173 kt TNT reported by the USGS. The bolide location obtained by them (57.86 • N, 173.41 • E) is different by more than one degree from our location (56.88 • N, 172.41 • E) and cannot be correct.…”
Section: Discussioncontrasting
confidence: 63%
“…The data analyzed by us did not allow us to compute the bolide energy. Nevertheless, Pilger et al (2020) obtained 50 kt TNT from infrasonic data, significantly less than the 173 kt TNT reported by the USGS. The bolide location obtained by them (57.86 • N, 173.41 • E) is different by more than one degree from our location (56.88 • N, 172.41 • E) and cannot be correct.…”
Section: Discussioncontrasting
confidence: 63%
“…A rare, naturally occurring source of these signals are meteoroids and asteroids that penetrate the atmosphere at high speeds. This concept has been demonstrated in numerous publications (Edwards et al 2010;Silber et al 2011Silber et al , 2018Ens et al 2012;Hedlin et al 2012;Brown et al 2013;Caudron et al 2016;Ott et al 2019aOtt et al , 2020aPilger et al 2015Pilger et al , 2020, proving that infrasound can also be used as a fireball detection method that provides global data.…”
Section: Introductionmentioning
confidence: 94%
“…The period at the maximum amplitude also serves as an input parameter to energy and yield estimationsfor instance, two relations of the Air Force Technical Application Center (AFTAC; ReVelle, 1997) are commonly used to estimate the energy of fireballs entering and burning up in the atmosphere (e.g., Ott et al, 2019;Pilger et al, 2020). The product variable of this https://doi.org/10.5194/essd-2021-441…”
Section: Wave Front Parametersmentioning
confidence: 99%
“…The back azimuth deviation increased with time, which allows inferring the trajectory of the fireball (e.g., Pilger et al, 2020). Combining the information of the different data products would Overall, infrasound recordings can be helpful to detect, locate and characterize large meteorites entering uninhabited regions where they remain unnoticed by the public, such as the Bering Sea fireball on 18 December 2018 (Redd, 2019), which was the second strongest fireball ever detected by the IMS infrasound network (e.g., Pilger et al, 2020). Infrasound observations can serve as a primary source of information or complement observations by other technologies (e.g., Ott et al, 2019).…”
Section: Fireball Near Chelyabinsk Russia On 15 February 2013mentioning
confidence: 99%
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