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Authors: Bartosch, T.*
Seidl, D.*
Title: Spectrogram analysis of selected tremor signals using short-time Fourier transform and continuous wavelet transform
Issue Date: Jun-1999
Series/Report no.: 42/3
Keywords: spectrogram
wavelet transform
broadband tremor
Abstract: Among a variety of spectrogram methods Short-Time Fourier Transform (STFT) and Continuous Wavelet Transform (CWT) were selected to analyse transients in non-stationary tremor signals. Depending on the properties of the tremor signal a more suitable representation of the signal is gained by CWT. Three selected broadband tremor signals from the volcanos Mt. Stromboli, Mt. Semeru and Mt. Pinatubo were analyzed using both methods. The CWT can also be used to extend the definition of coherency into a time-varying coherency spectrogram. An example is given using array data from the volcano Mt. Stromboli.
Appears in Collections:04.06.10. Instruments and techniques
Annals of Geophysics

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