الفهرس 
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Abstract
The Infrasound technology is considered as one of the most important technologies in the International Monitoring System (IMS). Due to the very low frequency content of infrasonic waves (less than 20 Hz), they can travel to far distances according to the spreading of the waves in the atmosphere. A number of sources in the earth and atmosphere can produce the infrasound waves. These sources include man made signals and natural sources. The first one repents explosions while the second includes earthquakes, volcanoes, fireball and meteorites. The Infrasound Database Centre (IDC) integrates between seismic and infrasound technologies to get the best location of the events. In this thesis, the infrasonic data only is processed using the Progressive Multi Channel Correlation algorithm (PMCC) which is a very effective technique in array analysis. This technique correlates the signals recorded by the different collocated elements of the array. The obtained correlation function reflects different patterns depending on spectral characteristics of the infrasound source. In this study, we analyzed the infrasound waves produced by three meteors. The October 7, 2008 TC3 meteor fallen over the north Sudan Nubian Desert, the February 15, 2013 Russian fireball, and the February 6, 2016 Atlantic meteor near to the Brazil coast. In this study also, we analyzed the infrasound waves produced by two explosions. The first Sayarim experiment in Aug. 2009 was recorded in stations located (erroneously) to the west of the explosion, while the second experiment in Jan. 2011 was recorded giving the source location (erroneously) to the east of the explosion. This error in the two cases is probably related to the wind direction in summer and winter seasons. The infrasound is used also in Japan for monitoring the Sakurajima volcano and for estimating its eruption time. The infrasonic waves which rustle from the launching of a rocket can be very useful in tracking rockets and detecting the rocket accidents. A clear example is the accident of Dnepr rocket which launched in 2006 from Baikonur, Kazakhstan which is located in this study. Finally, the Mw 9.2 March 11, 2011Tohoku earthquake is located also using this technique. The locations obtained, for all these sources, using the PMCC applied on the infrasound waves match those obtained in integrating all data of the IMS.