Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7721
AuthorsZaccarelli, L.* 
Bianco, F.* 
Zaccarelli, R.* 
TitleSplitting parameter yield (SPY): A program for semiautomatic analysis of shear wave splitting
Issue Date2012
Series/Report no./40 (2012)
DOI10.1016/j.cageo.2011.08.006
URIhttp://hdl.handle.net/2122/7721
KeywordsCrustal anisotropy
Waveform analysis
Seismic monitoring
Stress field
Subject Classification04. Solid Earth::04.06. Seismology::04.06.07. Tomography and anisotropy 
04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology 
04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis 
AbstractSPY is a Matlab algorithm that analyzes seismic waveforms in a semiautomatic way, providing estimates of the two observables of the anisotropy: the shear-wave splitting parameters. We chose to exploit those computational processes that require less intervention by the user, gaining objectivity and reliability as a result. The algorithm joins the covariance matrix and the cross-correlation techniques, and all the computation steps are interspersed by several automatic checks intended to verify the reliability of the yields. The resulting semiautomation generates two new advantages in the field of anisotropy studies: handling a huge amount of data at the same time, and comparing different yields. From this perspective, SPY has been developed in the Matlab environment, which is widespread, versatile, and user-friendly. Our intention is to provide the scientific community with a new monitoring tool for tracking the temporal variations of the crustal stress field.
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