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Discrimination between stochastic dynamics patterns of ambient noises (Case study for Oni seismic station)

Matcharashvili T., Chelidze T., Javakhishvili Z., Zhukova N., Jorjiashvili N., Shengelia I.

Acta Geophysica

2013

Vol. 61, no. 6

1659--1676

Investigation of complex dynamics of ambient seismic noise remains as an important scientific research challenge. In this work we investigated dynamical features of the ambient noises at Oni seismic station, Georgia. We used stochastic model reconstruction method from measured data sets. Seismic records for different time periods around Oni seismic station have been analysed. It was shown that the dynamics of fluctuations of seismic noise vertical component undergoes essential changes for considered time period from 2005 to 2012. These changes are more noticeable for time periods of preparation and aftershock activity of strong M6.0 earthquake occurred in 2009 in the vicinity of Oni seismic station.