Computer Science – Sound
Scientific paper
Jun 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3812201s&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 12, CiteID L12201
Computer Science
Sound
1
Atmospheric Processes: Acoustic-Gravity Waves, Planetary Sciences: Solid Surface Planets: Impact Phenomena, Cratering (6022, 8136), Planetary Sciences: Solid Surface Planets: Remote Sensing, Planetary Sciences: Solid Surface Planets: General Or Miscellaneous, Planetary Sciences: Solar System Objects: Meteors
Scientific paper
We present analysis of infrasonic signals produced by a large Earth-impacting fireball, believed to be among the most energetic instrumentally recorded during the last century that occurred on 8 October, 2009 over Indonesia. This extraordinary event, detected by 17 infrasonic stations of the global International Monitoring Network, generated stratospherically ducted infrasound returns at distances up to 17 500 km, the greatest range at which infrasound from a fireball has been detected since the 1908 Tunguska explosion. From these infrasonic records, we find the total source energy for this bolide as 8-67 kilotons of TNT equivalent explosive yield, with the favored best estimate near ˜50 kt. Global impact events of such energy are expected only once per decade and study of their impact effects can provide insight into the impactor threshold levels for ground damage and climate perturbations.
Brown Peter G.
Le Pichon Alexis
Silber Elizabeth A.
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