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Seismicity and Focal Mechanisms at the Calabro-Lucanian boundary along the Apennine chain (southern Italy)
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Abstract
The Calabro-Lucanian boundary is a complex geological zone marking the transition between the highly seismogenic tectonic
domains of Southern Apennines and the Calabrian Arc.
Historical catalogues include earthquakes with macroseismic effects up to VII-VIII MCS (CPTI WORKING GROUP, 2004) and paleoseismological investigations suggested that earthquakes of
magnitude between 6.5 and 7 may have occurred in this area,
between the 6th and the 15th century (MICHETTI et alii, 2000).
More recently, on 9 September 1998, an earthquake of moment
magnitude M5.6 occurred at the north-western margin of the
Pollino massif (GUERRA et alii, 2005; ARRIGO et alii, 2006) and
since the second half of 2010 the same region was interested by a noteworthy seismic activity characterized by several swarms with thousands of events with a maximum magnitude of 3.6