Articles | Volume 11, issue 4
Nonlin. Processes Geophys., 11, 453–461, 2004
https://doi.org/10.5194/npg-11-453-2004

Special issue: Nonlinear analysis of multivariate geoscientific data - advanced...

Nonlin. Processes Geophys., 11, 453–461, 2004
https://doi.org/10.5194/npg-11-453-2004

  21 Oct 2004

21 Oct 2004

Characterization of Strombolian events by using independent component analysis

A. Ciaramella1, E. De Lauro2, S. De Martino2,3,4, B. Di Lieto2, M. Falanga2,3,4, and R. Tagliaferri1 A. Ciaramella et al.
  • 1Dipartimento di Matematica ed Informatica, Salerno University, via S. Allende, I-84081 Baronissi (SA), Italy
  • 2Dipartimento di Fisica, Salerno University, via S. Allende, I-84081 Baronissi (SA), Italy
  • 3INFM, unità di Salerno, via S. Allende, I-84081 Baronissi (SA), Italy
  • 4INFN, gruppo collegato di Salerno, via S. Allende, I-84081 Baronissi (SA), Italy

Abstract. We apply Independent Component Analysis (ICA) to seismic signals recorded at Stromboli volcano. Firstly, we show how ICA works considering synthetic signals, which are generated by dynamical systems. We prove that Strombolian signals, both tremor and explosions, in the high frequency band (>0.5 Hz), are similar in time domain. This seems to give some insights to the organ pipe model generation for the source of these events. Moreover, we are able to recognize in the tremor signals a low frequency component (<0.5 Hz), with a well defined peak corresponding to 30s.