Strains arising by seismic events in the SIRGAS-CON network region
In this study, we investigate surface strains related to seismic events and their relationship with pre- and post-seismic events in Latin America, by analyzing the variation of estimated earth coordinates supplied by a geodetic network called SIRGAS-CON. Based on data provided by the USGS for the pe...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2013-03-01
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| Series: | Journal of Geodetic Science |
| Subjects: | |
| Online Access: | https://doi.org/10.2478/jogs-2013-0005 |
| _version_ | 1811186674064949248 |
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| author | Marotta G. S. França G. S. Monico J. F. G. Fuck R. A. |
| author_facet | Marotta G. S. França G. S. Monico J. F. G. Fuck R. A. |
| author_sort | Marotta G. S. |
| collection | DOAJ |
| description | In this study, we investigate surface strains related to seismic events and their relationship with pre- and post-seismic events in Latin America, by analyzing the variation of estimated earth coordinates supplied by a geodetic network called SIRGAS-CON. Based on data provided by the USGS for the period 2000-2011, and after the Global Congruency test, we selected four events associated with unstable geodetic network points. The resulting strains were estimated based on the finite element method using networks of points considered unstable connected to neighboring points using the Delaunay triangulation. It was possible to determine the strains along with the resulting guidelines for pre- and post-seismic, considering each triangular lattice formed for analysis as a homogeneous solid body. The calculation of strains and verification of the results allowed to analyze the interactions between lithospheric plates from the contraction and extension directions between points located in different plates. Despite the association between seismic events and the strain of geodetic network, some events of magnitude greater than 5.8 Mw were excluded because it does not show (provide) the surface strain, which is located at great depths. It was confirmed that events of greater magnitude provide increased surface strain rate when compared with other similar depths. |
| first_indexed | 2024-04-11T13:49:13Z |
| format | Article |
| id | doaj.art-476ce8a1115d4d09a6590211ebb15ca0 |
| institution | Directory Open Access Journal |
| issn | 2081-9943 |
| language | English |
| last_indexed | 2024-04-11T13:49:13Z |
| publishDate | 2013-03-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Journal of Geodetic Science |
| spelling | doaj.art-476ce8a1115d4d09a6590211ebb15ca02022-12-22T04:20:44ZengDe GruyterJournal of Geodetic Science2081-99432013-03-0131122110.2478/jogs-2013-0005Strains arising by seismic events in the SIRGAS-CON network regionMarotta G. S.0França G. S.1Monico J. F. G.2Fuck R. A.3Seismological Observatory - Geosciences Institute, University of Brasília, Campus Universitário Darcy Ribeiro, CEP:70910-900, Brasília/DF, BrazilSeismological Observatory - Geosciences Institute, University of Brasília, Campus Universitário Darcy Ribeiro, CEP:70910-900, Brasília/DF, BrazilDepartment of Cartography - Faculty of Science and Technology, Paulista State University Júlio de Mesquita Filho, Rua Roberto Simonsen 305, Centro Educacional, Presidente Prudente/SP, BrazilGeochronology Laboratory - Geosciences Institute, University of Brasília, Campus Universitário Darcy Ribeiro, CEP:70910-900, Brasília/DF, BrazilIn this study, we investigate surface strains related to seismic events and their relationship with pre- and post-seismic events in Latin America, by analyzing the variation of estimated earth coordinates supplied by a geodetic network called SIRGAS-CON. Based on data provided by the USGS for the period 2000-2011, and after the Global Congruency test, we selected four events associated with unstable geodetic network points. The resulting strains were estimated based on the finite element method using networks of points considered unstable connected to neighboring points using the Delaunay triangulation. It was possible to determine the strains along with the resulting guidelines for pre- and post-seismic, considering each triangular lattice formed for analysis as a homogeneous solid body. The calculation of strains and verification of the results allowed to analyze the interactions between lithospheric plates from the contraction and extension directions between points located in different plates. Despite the association between seismic events and the strain of geodetic network, some events of magnitude greater than 5.8 Mw were excluded because it does not show (provide) the surface strain, which is located at great depths. It was confirmed that events of greater magnitude provide increased surface strain rate when compared with other similar depths.https://doi.org/10.2478/jogs-2013-0005geodetic networklithospheric plateslithospheric platespost-seismicpre-seismicsurface strains |
| spellingShingle | Marotta G. S. França G. S. Monico J. F. G. Fuck R. A. Strains arising by seismic events in the SIRGAS-CON network region Journal of Geodetic Science geodetic network lithospheric plates lithospheric plates post-seismic pre-seismic surface strains |
| title | Strains arising by seismic events in the SIRGAS-CON network region |
| title_full | Strains arising by seismic events in the SIRGAS-CON network region |
| title_fullStr | Strains arising by seismic events in the SIRGAS-CON network region |
| title_full_unstemmed | Strains arising by seismic events in the SIRGAS-CON network region |
| title_short | Strains arising by seismic events in the SIRGAS-CON network region |
| title_sort | strains arising by seismic events in the sirgas con network region |
| topic | geodetic network lithospheric plates lithospheric plates post-seismic pre-seismic surface strains |
| url | https://doi.org/10.2478/jogs-2013-0005 |
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