The 1998 Aiquile, Bolivia earthquake: A seismically active fault revealed with InSAR
Using SAR interferometry (InSAR), the deformation field of the Mw=6.6, 1998 Aiquile, Bolivia earthquake is mapped, and the epicentre accurately located for the first time. Elastic dislocation modelling is used to demonstrate that the measured displacements are best explained with a ∼N-S oriented fau...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2005
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| _version_ | 1797094003440615424 |
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| author | Funning, G Barke, R Lamb, S Minaya, E Parsons, B Wright, T |
| author_facet | Funning, G Barke, R Lamb, S Minaya, E Parsons, B Wright, T |
| author_sort | Funning, G |
| collection | OXFORD |
| description | Using SAR interferometry (InSAR), the deformation field of the Mw=6.6, 1998 Aiquile, Bolivia earthquake is mapped, and the epicentre accurately located for the first time. Elastic dislocation modelling is used to demonstrate that the measured displacements are best explained with a ∼N-S oriented fault, with a strike that is oblique to the principal topographic features in the region, and a location that agrees with a Modified Mercalli Intensity map constructed from observations of damage in the surrounding area. A variable-slip solution for a fault in this orientation is obtained which predicts peak slip of 1.42 m at depths of ∼4-5 km on the fault plane and has an estimated seismic moment, M0=8.44×1018 N m, which agrees with estimates from long-period seismology. This is the first time that a fault has been demonstrated unambiguously to be active in the Central Andes, and since there was no previous knowledge of an active fault with this location or orientation, a necessary conclusion is that our understanding of seismic hazard in this region is limited. © 2005 Elsevier B.V. All rights reserved. |
| first_indexed | 2024-03-07T04:08:07Z |
| format | Journal article |
| id | oxford-uuid:c6e6c783-e2c7-4946-9d36-8e9f2fb9a4ac |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:08:07Z |
| publishDate | 2005 |
| record_format | dspace |
| spelling | oxford-uuid:c6e6c783-e2c7-4946-9d36-8e9f2fb9a4ac2022-03-27T06:41:10ZThe 1998 Aiquile, Bolivia earthquake: A seismically active fault revealed with InSARJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c6e6c783-e2c7-4946-9d36-8e9f2fb9a4acEnglishSymplectic Elements at Oxford2005Funning, GBarke, RLamb, SMinaya, EParsons, BWright, TUsing SAR interferometry (InSAR), the deformation field of the Mw=6.6, 1998 Aiquile, Bolivia earthquake is mapped, and the epicentre accurately located for the first time. Elastic dislocation modelling is used to demonstrate that the measured displacements are best explained with a ∼N-S oriented fault, with a strike that is oblique to the principal topographic features in the region, and a location that agrees with a Modified Mercalli Intensity map constructed from observations of damage in the surrounding area. A variable-slip solution for a fault in this orientation is obtained which predicts peak slip of 1.42 m at depths of ∼4-5 km on the fault plane and has an estimated seismic moment, M0=8.44×1018 N m, which agrees with estimates from long-period seismology. This is the first time that a fault has been demonstrated unambiguously to be active in the Central Andes, and since there was no previous knowledge of an active fault with this location or orientation, a necessary conclusion is that our understanding of seismic hazard in this region is limited. © 2005 Elsevier B.V. All rights reserved. |
| spellingShingle | Funning, G Barke, R Lamb, S Minaya, E Parsons, B Wright, T The 1998 Aiquile, Bolivia earthquake: A seismically active fault revealed with InSAR |
| title | The 1998 Aiquile, Bolivia earthquake: A seismically active fault revealed with InSAR |
| title_full | The 1998 Aiquile, Bolivia earthquake: A seismically active fault revealed with InSAR |
| title_fullStr | The 1998 Aiquile, Bolivia earthquake: A seismically active fault revealed with InSAR |
| title_full_unstemmed | The 1998 Aiquile, Bolivia earthquake: A seismically active fault revealed with InSAR |
| title_short | The 1998 Aiquile, Bolivia earthquake: A seismically active fault revealed with InSAR |
| title_sort | 1998 aiquile bolivia earthquake a seismically active fault revealed with insar |
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