Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1346
AuthorsPondrelli, S. 
TitlePattern of seismic deformation in the Western Mediterranean
Issue DateFeb-1999
Series/Report no.42/1
URIhttp://hdl.handle.net/2122/1346
KeywordsDeformation
seismicity
geodynamics
Mediterranean
Subject Classification04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring 
05. General::05.02. Data dissemination::05.02.02. Seismological data 
AbstractThe seismic deformation of the Western Mediterranean was studied with the aim of defining the strain pattern that characterizes the Africa-Eurasia plate boundary in this area. Within different sections along the boundary the cumulative moment tensor was computed over 90 years of seismological data. The results were compared with NUVELlA plate motion model and geodetic data. A stable agreement was found along Northern Africa to Sicily, where only Africa and Eurasia plates are involved. In this zone it is evident that changes in the strike of the boundary correspond to variations in the prevailing geometry of deformation, tectonic features and in the percentage of seismic with respect to total expected deformation. The geometry of deformation of periadriatic sections (Central to Southern Apennines, Eastern Alps and the Eastern Adriatic area) agrees well with VLBI measurements and with regional geological features. Seismicity seems to account for low rates, from 3% to 31%, of total expected deformation. Only in the Sicily Strait, characterized by extensional to strike slip deformation, does the ratio reach a higher value (79%). If the amount of deformation deduced from seismicity seems low, because 90 years are probably not representative of the recurrence seismic cycle of the Western Mediterranean, the strain pattern we obtain from cumulative moment tensors is more representative of the kinematics of this area than global plate motion models and better identifies lower scale geodynamic features.
Appears in Collections:Annals of Geophysics

Files in This Item:
File Description SizeFormat 
07 pondrelli.pdf5.31 MBAdobe PDFView/Open
Show full item record

Page view(s)

79
checked on Apr 26, 2017

Download(s)

229
checked on Apr 26, 2017

Google ScholarTM

Check