We investigate a large geodetic data set of interferometric synthetic aperture radar (InSAR)and GPS measurements to determine the source parameters for the three main shocks of the 2016Central Italy earthquake sequence on 24 August and 26 and 30 October (Mw6.1, 5.9, and 6.5,respectively). Our preferred model is consistent with the activation of four main coseismic asperitiesbelonging to the SW dipping normal fault system associated with the Mount Gorzano-Mount Vettore-Mount Bove alignment. Additional slip, equivalent to aMw~ 6.1–6.2 earthquake, on a secondary (1) NEdipping antithetic fault and/or (2) on a WNW dipping low-angle fault in the hanging wall of the mainsystem is required to better reproduce the complex deformation pattern associated with the greatestseismic event (theMw6.5 earthquake). The recognition of ancillary faults involved in the sequencesuggests a complex interaction in the activated crustal volume between the main normal faults and thesecondary structures and a partitioning of strain release
Geodetic model of the 2016 Central Italy earthquake sequence inferred from InSAR and GPS data / Cheloni, D.; De Novellis, V.; Albano, M.; Antonioli, A.; Anzidei, M.; Atzori, S.; Avallone, Alessandro; Bignami, C.; Bonano, M.; Calcaterra, Silvia; Castaldo, R.; Casu, F.; Cecere, G.; De Luca, C.; Devoti, R.; Di Bucci, D.; Esposito, A.; Galvani, A.; Gambino, P.; Giuliani, R.; Lanari, R.; Manunta, M.; Manzo, M.; Mattone, ALBERTO MARIA; Montuori, A.; Pepe, A.; Pepe, S.; Pezzo, G.; Pietrantonio, G.; Polcari, M.; Riguzzi, F.; Salvi, Silvia; Sepe, V.; Serpelloni, E.; Solaro, G.; Stramondo, S.; Tizzani, P.; Tolomei, C.; Trasatti, E.; Valerio, E.; Zinno, I.; Doglioni, C.. - In: GEOPHYSICAL RESEARCH LETTERS. - ISSN 0094-8276. - 44:13(2017), pp. 6778-6787. [10.1002/2017GL073580]
Geodetic model of the 2016 Central Italy earthquake sequence inferred from InSAR and GPS data
Anzidei, M.;Atzori, S.;Bignami, C.;CALCATERRA, SILVIA;Casu, F.;Manunta, M.;MATTONE, ALBERTO MARIA;Montuori, A.;Pietrantonio, G.;Riguzzi, F.;SALVI, SILVIA;Valerio, E.;Doglioni, C.
2017
Abstract
We investigate a large geodetic data set of interferometric synthetic aperture radar (InSAR)and GPS measurements to determine the source parameters for the three main shocks of the 2016Central Italy earthquake sequence on 24 August and 26 and 30 October (Mw6.1, 5.9, and 6.5,respectively). Our preferred model is consistent with the activation of four main coseismic asperitiesbelonging to the SW dipping normal fault system associated with the Mount Gorzano-Mount Vettore-Mount Bove alignment. Additional slip, equivalent to aMw~ 6.1–6.2 earthquake, on a secondary (1) NEdipping antithetic fault and/or (2) on a WNW dipping low-angle fault in the hanging wall of the mainsystem is required to better reproduce the complex deformation pattern associated with the greatestseismic event (theMw6.5 earthquake). The recognition of ancillary faults involved in the sequencesuggests a complex interaction in the activated crustal volume between the main normal faults and thesecondary structures and a partitioning of strain release| File | Dimensione | Formato | |
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