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Authors: Adelfio, Giada 
Chiodi, Marcello 
D'Alessandro, Antonino 
Luzio, Dario 
Title: Clustering of Waveforms Based on FPCA Direction
Issue Date: 21-Jul-2010
Keywords: FPCA
Waveforms clustering
Subject Classification04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous 
Abstract: Abstract. Looking for curves similarity could be a complex issue characterized by subjective choices related to continuous transformations of observed discrete data (Chiodi, 1989). Waveforms correlation techniques have been introduced to charac- terize the degree of seismic event similarity (Menke, 1999) and in facilitating more accurate relative locations within similar event clusters by providing more precise timing of seismic wave (P and S) arrivals (Phillips, 1997). In this paper functional analysis (Ramsey, and Silverman, 2006) is considered to highlight common characteristics of waveforms-data and to summarize these charac- teristics by few components, by applying a variant of a classical clustering method to rotated data (Sangalli et al., 2010) according to the direction of maximum variance (i.e. based on PCA rotation of data).
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