Dissimilarity Measures for the Identification of Earthquake Focal Mechanisms

  • Francesco Benvegna
  • Giosué Lo Bosco
  • Domenico Tegolo
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8157)


This work presents a study about dissimilarity measures for seismic signals, and their relation to clustering in the particular problem of the identification of earthquake focal mechanisms, i.e. the physical phenomena which have generated an earthquake. Starting from the assumption that waveform similarity implies similarity in the focal parameters, important details about them can be determined by studying waveforms related to the wave field produced by earthquakes and recorded by a seismic network. Focal mechanisms identification is currently investigated by clustering of seismic events, using mainly cross-correlation dissimilarity in conjunction with hierarchical clustering algorithm. By the way, it results that such adoptions have not been sufficiently validated. To shed light on this we have studied the cross correlation dissimilarity on simulated seismic signals in conjunction with hierarchical and partitional clustering algorithms, and compared its performance with a newly one recently introduced for the purpose called cumulative shape. In particular, we have properly created synthetic waveforms related to two types of focal mechanisms, showing that the cumulative shape perform better than cross-correlation in the identification of the expected clustering solution.


metrics clustering seismic signals waveforms 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Francesco Benvegna
    • 1
    • 2
  • Giosué Lo Bosco
    • 1
    • 2
    • 3
  • Domenico Tegolo
    • 1
    • 3
  1. 1.Dipartimento di Matematica e InformaticaUniversitá degli Studi di PalermoItaly
  2. 2.I.E.ME.S.T., Istituto Euro Mediterraneo di Scienza e TecnologiaPalermoItaly
  3. 3.C.I.T.C, Centro Interdipartimentale di Teconologie della ConoscenzaPalermoItaly

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