Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/7318
Authors: | Trasatti, E.* Kyriakopoulos, C.* Chini, M.* |
Title: | Finite element inversion of DInSAR data from the Mw 6.3 L’Aquila earthquake, 2009 (Italy) | Journal: | Geophysical Research Letters | Series/Report no.: | /38 (2011) | Issue Date: | 26-Apr-2011 | DOI: | 10.1029/2011GL046714 | Keywords: | finite element model DInSAR |
Subject Classification: | 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics | Abstract: | Fault slip distribution is usually retrieved from geodetic data assuming that the local crust is an elastic, homogeneous and isotropic half‐space. In the last decades spatially dense geodetic data (e.g., DInSAR maps) have highlighted complex patterns of coseismic deformation that require new modeling tools, such as numerical methods, able to represent rheological and geometrical complexities of the Earth’s crust. In this work, we develop a procedure to perform inversion of geodetic data based on the finite element method, accounting for a more realistic description of the local crust. The method is applied to the 2009 L’Aquila earthquake (Mw 6.3), using DInSAR images of the coseismic displacement. Results highlight the non‐negligible influence of the medium structure: homogeneous and heterogeneous models show discrepancies up to 20% in the fault slip distribution values. Furthermore, in the heterogeneous models a new area of slip appears above the hypocenter. We also perform a resolution study, showing that the information about fault slip distributions retrieved from geodetic data should be considered as averaged on surrounding patches. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
2011_GRL_Trasatti_et_al.pdf | 4.5 MB | Adobe PDF | ||
TRASATTI-2011GL046714-accettato.pdf | 898.95 kB | Adobe PDF | View/Open |
WEB OF SCIENCETM
Citations
50
45
checked on Feb 10, 2021
Page view(s)
598
checked on Apr 24, 2024
Download(s) 50
193
checked on Apr 24, 2024