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Matcharashvili_et_al-ac 2012.pdf

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/8394 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/8394 http://eprints.org/relation/ismediumThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/8394 8398 2 22504 document 8398 small.jpg image/png 9fb7bf51e5ca8f50e4978532211ac9dc MD5 1868 2015-04-05 15:46:09 http://eprints.iliauni.edu.ge/1867/5/small.jpg 1867 5 5 image/png other Thumbnails conversion from text to thumbnail_small ge public

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/8394 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/8394 http://eprints.org/relation/issmallThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/8394 archive 140 disk0/00/00/18/67 2015-04-06 07:25:40 2015-04-06 07:25:40 2015-04-06 07:25:40 article show Matcharashvili T. Chelidze T. Javakhishvili Zurab zurab_javakhishvili@iliauni.edu.ge Jorjiashvili N. Zhukova N. pub GPH ins3 public Investigation of dynamical features of ambient seismic noise is one of the important scientific and practical research challenges. We investigated scaling features of the ambient noises at the Oni seismic station, Georgia, using detrended fluctuation analysis method. Data from this seismic station, located in the epicentral zone of Oni M6.0, 2009, earthquake, were selected to include time periods with different levels of local seismic activity. It was shown that the investigated ambient noise is persistent long range correlated at calm seismic conditions in the absence of earthquakes. Fluctuation features of the analyzed ambient noises were affected by local earthquakes, while remote seismic activity caused just slight quantitative changes. Processes related to the preparation of a strong local earthquake may cause quantifiable changes in fluctuation features of ambient noises. Fluctuation features of seismic noise for periods of increased local seismic activity cease to be long-range correlated and appear to become a complicated mixture of random and correlated behaviours. 2012-06 Acta Geophysica 60 3 809-832 TRUE 1895-6572 (print version); 1895-7455 (electronic version)