Visualization and multivariate clustering of scattered moment tensors

Authors:
Harald Obermaier;Magali I. Billen;Kenneth I. Joy;Hans Hagen;Martin Hering-Bertram
Affiliations:
University of California Davis, CA and University of California Davis, CA;University of California Davis, CA;University of California Davis, CA;University of Kaiserslautern, Kaiserstautern, Germany;Rhine-Waal University of Applied Sciences, Germany
Venue:
Information Visualization - Special issue on Visualization and Data Analysis 2011
Year:
2012

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Abstract

Moment tensors are indefinite tensors derived from seismic measurements and encode important information about earthquakes and surface displacement in the earth's mantle. Appropriate analysis of scattered moment tensor fields requires multi-scale visualization to identify related seismic events. For this matter we provide a visualization of the tensor field at different scales based on multivariate tensor clustering. The resulting visualization allows interactive analysis of individual tensors, analysis of tensor groups and clustering behavior as well as examination of the complete tensor field. Our results show the benefit of mutti-scate earthquake and displacement analysis and demonstrate the advantages over classic tensor visualization and univariate, static cluster visualization.