Inversion of synthetic geodetic data for the 1997 Colfiorito events: clues on the effects of layering, assessment of model parameter PDFs, and model selection criteria

A. Amoruso, L. Crescentini


The 1997 September-October Umbria-Marche sequence has been extensively studied in the past by analyzing
coseismic displacement data (GPS, leveling, SAR). Here we focus on synthetic data representative of the main
event of the 1997 Umbria-Marche sequence and investigate the effects of a crustal layering proper to the Colfiorito
area on surface displacements and inferred source features when inverting coseismic geodetic data without
taking into account layering. We compare bootstrapping and NA-Bayes as tools for parameter uncertainty assessment
and show how the Akaike Information Criterion can be used to select the model which is most likely
to be correct. Since SAR images offer the most complete coverage of the study area, we use synthetic line-ofsight
displacement data.


data inversion;geodesy;coseismic displacement

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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X