Historical earthquakes and variable kinematic behaviour of the 2009 L'Aquila seismic event (central Italy) causative fault, revealed by paleoseismological investigations

摘要: Abstract Paleoseismological investigations has been carried out along the causative fault of Mw 6.1 2009 L'Aquila earthquake. We dug three trenches in two different sites on Paganica to understand its Holocene kinematic behavior. results show a minimum faulting events preceding The most recent recognized event occurred after 1420–1610 A.D., tentatively attributed 1703 (February 2) seismic shock; previous happened between 1st–2nd century A.D. and 7th–9th A.D., probably interval 4th–6th while another identified prior observed displacement per varies from 0.25 m 0.50 m consistent with length about 22–27 km, which we infer maximum expected 6.6–6.7. This implies that may occasionally rupture during 2009-like as well larger earthquakes, activating contemporaneously nearby active faults kinematically structurally linked fault. More specifically, basis our data paleoseismologic studies, hypothesize linkage investigated Upper Aterno Valley Fault system. In this perspective, can an independent segment recurrence 3 hundreds years together system 1000 1500 years.