Title: Application of the Huang-Hilbert transform and natural time to the analysis of Seismic Electric Signal activities,
Abstract: The Huang-Hilbert transform is applied to Seismic Electric Signal (SES)
activities in order to decompose them into a number of Intrinsic Mode Functions
(IMFs) and study which of these functions better represent the SES. The results
are compared to those obtained from the analysis in a new time domain termed
natural time after having subtracted the magnetotelluric background from the
original signal. It is shown that the instantaneous amplitudes of the IMFs can
be used for the distinction of SES from artificial noises when combined with
the natural time analysis.