The 2009 earthquake, magnitude mb 4.8, in the Pantanal Wetlands, west-central Brazil
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Academia Brasileira de Ciências
2016
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| _version_ | 1876481445571067904 |
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| author | Fábio L. Dias |
| author_facet | Fábio L. Dias |
| contents | The 2009 earthquake, magnitude mb 4.8, in the Pantanal Wetlands, west-central Brazil Fábio L. Dias Marcelo Assumpcão Edna M. Facincani George S. Franca Mario L. Assine Antônio O. Paranhos Filho Roberto M. Gamarra Multidisciplinaria (Ciencias Naturales y Exactas) Earthquake neotectonics Pantanal basin focal mechanism intraplate stress The main goal of this paper is to characterize the Coxim earthquake occurred in June 15 th , 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 m b 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 m b 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. 2016 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32746972009 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.3 Vol.88 |
| format | Artículo científico |
| id | redalyc_32746972009 |
| institution | Redalyc |
| language | en |
| publishDate | 2016 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | The 2009 earthquake, magnitude mb 4.8, in the Pantanal Wetlands, west-central Brazil Fábio L. Dias Multidisciplinaria (Ciencias Naturales y Exactas) Earthquake neotectonics Pantanal basin focal mechanism intraplate stress The 2009 earthquake, magnitude mb 4.8, in the Pantanal Wetlands, west-central Brazil Fábio L. Dias Marcelo Assumpcão Edna M. Facincani George S. Franca Mario L. Assine Antônio O. Paranhos Filho Roberto M. Gamarra Multidisciplinaria (Ciencias Naturales y Exactas) Earthquake neotectonics Pantanal basin focal mechanism intraplate stress The main goal of this paper is to characterize the Coxim earthquake occurred in June 15 th , 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 m b 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 m b 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. 2016 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32746972009 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.3 Vol.88 |
| title | The 2009 earthquake, magnitude mb 4.8, in the Pantanal Wetlands, west-central Brazil |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) Earthquake neotectonics Pantanal basin focal mechanism intraplate stress |
| url | https://www.redalyc.org/articulo.oa?id=32746972009 |