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On the Observed Intensity Filtering in the Anisotropic Distribution Modelling of Macroseismic Intensity
Authors:D Termini  A Teramo  T Tuvè  A Bottari
Institution:(1) Osservatorio Sismologico, Università di Messina, Via Osservatorio, 4 – 98121 Messina, Italy
Abstract:The anisotropic modelling of intensity distribution, affected by the construction of macroseismic planes, allows an analysis of the influence of each point of observed intensity on the analytical determination of epicenter and of the principal attenuation directions. Such a procedure is a vital aid in the cases in which the observed intensity points, that, for location or joined intensity level, are not consistent with an anisotropic model of intensity attenuation. A suitable filtering on intensity levels associated with the points of the intensity map, for a better modelling of observed intensity distribution, is proposed with the aim of a better seismic hazard evaluation.
Keywords:Macroseismicity  observed intensity filtering  macroseismic planes
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