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Authors: Fracassi, U.* 
Milano, G.* 
Di Giovambattista, R.* 
Ventura, G.* 
Title: Imaging the polarity switch between large seismogenic normal faults in the southern Apennines (Italy)
Issue Date: 2008
Keywords: seismogenic sources
transfer zone
seismic sequence
southern Italy
Subject Classification04. Solid Earth::04.04. Geology::04.04.09. Structural geology 
04. Solid Earth::04.06. Seismology::04.06.02. Earthquake interactions and probability 
04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics 
Abstract: The transition between the central and southern Apennines (Italy) is marked, among other regional features, by a dramatic shift (from SW-dipping to NE-dipping) of the verging of the large (25+ km long) seismogenic normal faults, responsible for M>6 pre-historical and historical earthquakes. Also, in the exact area where such accommodation occurs, in 2005 a low magnitude (M<3) seismic sequence took place along a short stretch of a long-lived transverse structure Running across this transition zone. We believe this sequence sheds light on the geometry and the role of the interaction between these seismogenic domains.
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