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Authors: Piccinini, D.* 
Chiarabba, C.* 
Augliera, P.* 
Title: Compression along the northern Apenninines? Evidence from the Mw 5.3 Monghidoro earthquake
Issue Date: 2006
Series/Report no.: 2 / 18 (2006)
DOI: 10.1111/j.1365-3121.2005.00667.x
Keywords: seismological data
Subject Classification04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics 
04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring 
Abstract: In this paper, we present the seismological data recorded during the deployment of a dense three-component seismic network installed a few hours after the 2003 Mw 5.3 Monghidoro earthquake, in northern Apennines. The main shock focal solutions derived from polarities distribution and body wave modelling of regional broadband data show a NE–SW striking reverse mechanism. Accurate relative locations of aftershocks and the inversion of focal mechanisms show that earthquakes occurred on a NW-dipping backthrust within the Adria lithosphere under a NW-trending horizontal compression. The observed compression is a secondary process possibly explained by differential motion within the Adriatic lithosphere. Fault geometry and kinematics is controlled by pre-existing structures.
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