3 Seismicity and stress field in the Sannio-Matese area

摘要: In this study we discuss the available data on seismicity and focal mechanisms in Sannio-Matese area or-der to obtain information stress field acting area. Background of is character-ized by isolated events, with magnitude generally less than 2.5, which superimposed a swarm seismicsequence activity low (max 4.1). The epicentral distribution both events andseismic sequences, disclose NE-SW striking active faults that fall between fault segments large his-torical earthquakes occurred deducible from thefocal agrees general extensional regime acting. Locally andNNW-SSE extensions are observed. scale deduced stronginstrumental Apennines supports local extension but cannot ex-plain normal movements related NW-SE extension. longitudinal observed, support-ed GPS data, can be explained utilizing geodynamic models.