Interpreting the interseismic deformation of the Altotiberina Fault (central Italy) through 2D modelling
The Altotiberina low-angle normal fault in central Italy has been a focus of many recent studies. Although the existence of this fault has long been known, its seismicity and relationship to other faults are still debated. We present a 2D elastoplastic finite-element model that reproduces the inters...
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
2014-02-01
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doaj-bfee266e4e2b4e61af68c5a893a3eb0c2020-11-24T22:34:24ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X2014-02-0156610.4401/ag-58065916Interpreting the interseismic deformation of the Altotiberina Fault (central Italy) through 2D modellingDebora Finocchio0Salvatore Barba1Stefano Santini2Antonella Megna3Istituto Nazionale di Geofisica e Vulcanologia, Rome,Istituto Nazionale di Geofisica e Vulcanologia, Rome,Università degli Studi di Urbino “Carlo Bo”, Dipartimento di Scienze di Base e Fondamenti, Urbino,Istituto Nazionale di Geofisica e Vulcanologia, Rome,The Altotiberina low-angle normal fault in central Italy has been a focus of many recent studies. Although the existence of this fault has long been known, its seismicity and relationship to other faults are still debated. We present a 2D elastoplastic finite-element model that reproduces the interseismic deformation of the Altotiberina Fault. The model predictions are compared to observed geodetic velocities, stress orientations and geological data. The influence of the Altotiberina Fault on interseismic evolution is tested by building several models with different boundary conditions. The best model is 180 km long, 40 km deep and contains two layers with different rheological parameters, two ramps, two faults and four freely slipping segments. The main factors contributing to the large-scale interseismic deformation include basal traction, rheology and the Altotiberina Fault itself, whereas the local, small-scale variations are due to two secondary high-angle faults.http://www.annalsofgeophysics.eu/index.php/annals/article/view/5806Low-angle normal faultsEarthquakesNumerical modelRheology |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Debora Finocchio Salvatore Barba Stefano Santini Antonella Megna |
spellingShingle |
Debora Finocchio Salvatore Barba Stefano Santini Antonella Megna Interpreting the interseismic deformation of the Altotiberina Fault (central Italy) through 2D modelling Annals of Geophysics Low-angle normal faults Earthquakes Numerical model Rheology |
author_facet |
Debora Finocchio Salvatore Barba Stefano Santini Antonella Megna |
author_sort |
Debora Finocchio |
title |
Interpreting the interseismic deformation of the Altotiberina Fault (central Italy) through 2D modelling |
title_short |
Interpreting the interseismic deformation of the Altotiberina Fault (central Italy) through 2D modelling |
title_full |
Interpreting the interseismic deformation of the Altotiberina Fault (central Italy) through 2D modelling |
title_fullStr |
Interpreting the interseismic deformation of the Altotiberina Fault (central Italy) through 2D modelling |
title_full_unstemmed |
Interpreting the interseismic deformation of the Altotiberina Fault (central Italy) through 2D modelling |
title_sort |
interpreting the interseismic deformation of the altotiberina fault (central italy) through 2d modelling |
publisher |
Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
series |
Annals of Geophysics |
issn |
1593-5213 2037-416X |
publishDate |
2014-02-01 |
description |
The Altotiberina low-angle normal fault in central Italy has been a focus of many recent studies. Although the existence of this fault has long been known, its seismicity and relationship to other faults are still debated. We present a 2D elastoplastic finite-element model that reproduces the interseismic deformation of the Altotiberina Fault. The model predictions are compared to observed geodetic velocities, stress orientations and geological data. The influence of the Altotiberina Fault on interseismic evolution is tested by building several models with different boundary conditions. The best model is 180 km long, 40 km deep and contains two layers with different rheological parameters, two ramps, two faults and four freely slipping segments. The main factors contributing to the large-scale interseismic deformation include basal traction, rheology and the Altotiberina Fault itself, whereas the local, small-scale variations are due to two secondary high-angle faults. |
topic |
Low-angle normal faults Earthquakes Numerical model Rheology |
url |
http://www.annalsofgeophysics.eu/index.php/annals/article/view/5806 |
work_keys_str_mv |
AT deborafinocchio interpretingtheinterseismicdeformationofthealtotiberinafaultcentralitalythrough2dmodelling AT salvatorebarba interpretingtheinterseismicdeformationofthealtotiberinafaultcentralitalythrough2dmodelling AT stefanosantini interpretingtheinterseismicdeformationofthealtotiberinafaultcentralitalythrough2dmodelling AT antonellamegna interpretingtheinterseismicdeformationofthealtotiberinafaultcentralitalythrough2dmodelling |
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1725727688305410048 |