Next Article in Journal
Study of Chemical and Optical Properties of Biomass Burning Aerosols during Long-Range Transport Events toward the Arctic in Summer 2017
Previous Article in Journal
Spatial Variability in Years of Abrupt Seasonal Temperature Changes and Warming (Cooling) Hiatuses in China from 1951–2018 and the Variation Trends before and after These Years
Open AccessArticle

Global Monitoring and Characterization of Infrasound Signatures by Large Fireballs

1
BGR (Federal Institute for Geosciences and Natural Resources), D-30655 Hannover, Germany
2
Division for Medical Radiation Physics and Space Environment, UOL (Carl von Ossietzky University of Oldenburg), D-26129 Oldenburg, Germany
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(1), 83; https://doi.org/10.3390/atmos11010083
Received: 16 December 2019 / Revised: 7 January 2020 / Accepted: 8 January 2020 / Published: 10 January 2020
(This article belongs to the Special Issue Shock Wave Dynamics and Its Effects on Planetary Atmospheres)
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. View Full-Text
Keywords: infrasound; fireballs; meteoroids; atmospheric propagation modeling; localization; yield estimation; International Monitoring System; Comprehensive Nuclear-Test-Ban Treaty infrasound; fireballs; meteoroids; atmospheric propagation modeling; localization; yield estimation; International Monitoring System; Comprehensive Nuclear-Test-Ban Treaty
Show Figures

Figure 1

MDPI and ACS Style

Pilger, C.; Gaebler, P.; Hupe, P.; Ott, T.; Drolshagen, E. Global Monitoring and Characterization of Infrasound Signatures by Large Fireballs. Atmosphere 2020, 11, 83.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop