| Revista: | Anais da Academia Brasileira de Ciencias |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000400422 |
| ISSN: | 0001-3765 |
| Autors: | Dias, Fabio L1 Assumpcao, Marcelo1 Facincani, Edna M2 Franca, George S3 Assine, Mario L4 Paranhos-Filho, Antonio C5 Gamarra, Roberto M5 |
| Institucions: | 1Universidade de Sao Paulo, Instituto de Astronomia, Geofisica e Ciencias Atmosfericas, Sao Paulo. Brasil 2Universidade Federal de Mato Grosso do Sul, Campus de Aquidauana, Aquidauana, Mato Grosso do Sul. Brasil 3Universidade de Brasilia, Instituto de Geociencias, Brasilia, Distrito Federal. Brasil 4Universidade Estadual Paulista "Julio de Mesquita Filho", Instituto de Geociencias e Ciencias Exatas, Rio Claro, Sao Paulo. Brasil 5Universidade Federal de Mato Grosso do Sul, Faculdade de Engenharias, Arquitetura e Urbanismo e Geografia, Campo Grande, Mato Grosso do Sul. Brasil |
| Any: | 2016 |
| Període: | Sep |
| Volum: | 88 |
| Número: | 3 |
| Paginació: | 1253-1264 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | The main goal of this paper is to characterize the Coxim earthquake occurred in June 15th, 2009 in the Pantanal Basin and to discuss the relationship between its faulting mechanism with the Transbrasiliano Lineament. The earthquake had maximum intensity MM V causing damage in farm houses and was felt in several cities located around, including Campo Grande and Goiânia. The event had an mb 4.8 magnitude and depth was 6 km, i.e., it occurred in the upper crust, within the basement and 5 km below the Cenozoic sedimentary cover. The mechanism, a thrust fault mechanism with lateral motion, was obtained by P-wave first-motion polarities and confirmed by regional waveform modelling. The two nodal planes have orientations (strike/dip) of 300°/55° and 180°/55° and the orientation of the P-axis is approximately NE-SW. The results are similar to the Pantanal earthquake of 1964 with mb 5.4 and NE-SW compressional axis. Both events show that Pantanal Basin is a seismically active area, under compressional stress. The focal mechanism of the 1964 and 2009 events have no nodal plane that could be directly associated with the main SW-NE trending Transbrasiliano system indicating that a direct link of the Transbrasiliano with the seismicity in the Pantanal Basin is improbable |
| Disciplines | Geociencias |
| Paraules clau: | Sismología y vulcanología, Sismos, Esfuerzo de intraplaca, Neotectónica, Mecanismo focal, Brasil |
| Keyword: | Earth sciences, Seismology and volcanology, Earthquakes, Intraplate stress, Neotectonics, Focal mechanism, Brazil |
| Text complet: | Texto completo (Ver HTML) |
