EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Global Monitoring and Characterization of Infrasound Signatures by Large Fireballs

Christoph Pilger1, Peter Gaebler1, Patrick Hupe1, Theresa Ott2, and Esther Drolshagen2
Christoph Pilger et al.
  • 1BGR Hannover, Hannover, Germany (
  • 2Carl von Ossietzky University of Oldenburg, Oldenburg, Germany

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. Signal characteristics are derived by applying the Progressive Multi-Channel Correlation method as an array technique. The comparison of the events with a NASA reference database as well as the application of atmospheric propagation modeling allows to draw conclusions about infrasound-based detection capability, localization accuracy, yield estimation, and source characterization. The infrasound technique provides a time- and location-independent remote monitoring opportunity of impacting near-Earth objects (NEOs), either independent or complementary to other fireball observation methods. Additionally, insights about the detection and localization capability of IMS infrasound stations can be gained from using large fireballs as reference events, being of importance for the continuous monitoring and verification of atmospheric explosions in a CTBT context.

How to cite: Pilger, C., Gaebler, P., Hupe, P., Ott, T., and Drolshagen, E.: Global Monitoring and Characterization of Infrasound Signatures by Large Fireballs, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-3290,, 2020


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