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8395535 
Book/Book Chapter 
Meteor generated infrasound: Theory and observation 
Edwards, WN 
2009 
Chk 
Environmental Change and Its Implications for Population Migration
ISSN: 9781402028687 
Springer Netherlands 
Infrasound Monitoring for Atmospheric Studies 
361-414 
English 
There are many impulsive sources that produce infrasound in the atmosphere that can be detected by ground-based microbarometers, but few match the range of potential source energies and altitudes of meteor-generated infrasound. Ranging from the scale of centimeters to 100s of meters in dimension, hypervelocity meteoroids impacting the earth's atmosphere can range widely in energy from 10-5 to >104 kt (Kilotons) of TNT, producing infrasound that may be observed either locally or globally. In this review, the history and development of meteor-generated infrasound research is explored with focus on how observations of meteor infrasound are progressing our understanding of the interaction of meteoroids with the upper atmosphere and the physics of meteors in general. The theoretical development of cylindrical line source blast wave theory for meteors propagating in an inhomogeneous, stratified atmosphere is reviewed and shown how this approximation to a meteor's hypersonic ballistic shock relates to both regional and global observations of meteor infrasound, with examples that both fit and challenge our current understanding. Today, modern sensor suites and technology, both ground-and space-based, are providing a plethora of new constraints and secondary data that are helping unravel the source regions, generating methods and physics of meteor infrasound, while detections of infrasound from meteors/fireballs/bolides are being observed at an unprecedented rate by both the CTBT/International Monitoring System (IMS) global network and regional research groups. Some of the newest findings are reviewed and discussed. © 2009 Springer Science+Business Media B.V. 
Hypervelocity meteoroids; Meteor generated infrasound