Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/10181
Authors: | Albano, M.* Barba, S.* Saroli, M.* Moro, M.* Malvarosa, F.* Costantini, M.* Bignami, C.* Stramondo, S.* |
Title: | Gravity-driven postseismic deformation following the Mw 6.3 2009 L’Aquila (Italy) earthquake | Journal: | Scientific reports | Series/Report no.: | /5(2015) | Issue Date: | 10-Nov-2015 | DOI: | 10.1038/srep16558 | Keywords: | InSAR Numerical model gravity postseismic deformation |
Subject Classification: | 04. Solid Earth::04.07. Tectonophysics::04.07.05. Stress | Abstract: | The present work focuses on the postseismic deformation observed in the region of L’Aquila (central Italy) following the Mw 6.3 earthquake that occurred on April 6, 2009. A new, 16-month-long dataset of COSMO-SkyMed SAR images was analysed using the Persistent Scatterer Pairs interferometric technique. The analysis revealed the existence of postseismic ground subsidence in the mountainous rocky area of Mt Ocre ridge, contiguous to the sedimentary plain that experienced coseismic subsidence. The postseismic subsidence was characterized by displacements of 10 to 35 mm along the SAR line of sight. In the Mt Ocre ridge, widespread morphological elements associated with gravitational spreading have been previously mapped. We tested the hypothesis that the postseismic subsidence of the Mt Ocre ridge compensates the loss of equilibrium induced by the nearby coseismic subsidence. Therefore, we simulated the coseismic and postseismic displacement fields via the finite element method. We included the gravitational load and fault slip and accounted for the geometrical and rheological characteristics of the area. We found that the elastoplastic behaviour of the material under gravitational loading best explains the observed postseismic displacement. These findings emphasize the role of gravity in the postseismic processes at the fault scale. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
srep16558.pdf | 3.08 MB | Adobe PDF |
WEB OF SCIENCETM
Citations
20
10
checked on Feb 10, 2021
Page view(s) 20
326
checked on Apr 17, 2024
Download(s) 50
71
checked on Apr 17, 2024