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Aspectos de la sismicidad del territorio brasileño

Autor: Berrocal, J.
Otros Autores: Antezana, R ; Assumpcá o, M ; Dias Neto, C. M ; Franca, H ; Ortega, R ; Veloso, J.A.V.
Tema(s):
Resumen: In: Centro Regional de Sismología para América del Sur (CERESIS). Memoria de la reunión general del Programa para la Mitigación de los Efectos de los Terremotos en la Región Andina (Proyecto SISRA). Lima, Centro Regional de Sismología para América del Sur (CERESIS), 1985. Presentado en: Simposio sobre el Peligro y Riesgo Sísmico y Volcá nico en América del Sur; San Juan, 24-28 sept. 1984. Earthquakes which have occurred in Brazil from 1560 to december 1981 have been cataloged by the Instituto Astronómico e Geofísico of the Universidade de Sao Paulo. Since january 1982 the data are being published in the Revista Brasilera de Geofísica. From this cataloged, data of the principal events have been selected for the SISRA Catalog. Most of the data have been compiled from macroseismic information. For some significant events occurring during the last 100 years, an effort was made to find additional macroseismic data in the locatities were the tremors were felt. This allowed the construction of isoseismal maps and the definition of felts areas. Instrumental data exists for the most Brazilian seismographic stations were installed. During the period of study, not a single catastrophic event has ocurred in Brazil. A few events have produced intensities up to VII MM causing more emotional effects and concern than any significant material damage. Brazil occupies most of the South American pre-Cambrian shield, having a low level of seismic activity typical of intraplate regions. A relation between seismicity and tectonics is complex and not easy to delineate. Nevertheless, it is possible to infer the existence of the following seismotectonic regions : The Southeast region, the Northeast region, the Paraguay-Araguaia region, the Amazonas region, the Southeast Oceanic region, the Recóncavo Baiano region, and the North of Maranhá o region (AU).
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In: Centro Regional de Sismología para América del Sur (CERESIS). Memoria de la reunión general del Programa para la Mitigación de los Efectos de los Terremotos en la Región Andina (Proyecto SISRA). Lima, Centro Regional de Sismología para América del Sur (CERESIS), 1985. Presentado en: Simposio sobre el Peligro y Riesgo Sísmico y Volcá nico en América del Sur; San Juan, 24-28 sept. 1984. Earthquakes which have occurred in Brazil from 1560 to december 1981 have been cataloged by the Instituto Astronómico e Geofísico of the Universidade de Sao Paulo. Since january 1982 the data are being published in the Revista Brasilera de Geofísica. From this cataloged, data of the principal events have been selected for the SISRA Catalog. Most of the data have been compiled from macroseismic information. For some significant events occurring during the last 100 years, an effort was made to find additional macroseismic data in the locatities were the tremors were felt. This allowed the construction of isoseismal maps and the definition of felts areas. Instrumental data exists for the most Brazilian seismographic stations were installed. During the period of study, not a single catastrophic event has ocurred in Brazil. A few events have produced intensities up to VII MM causing more emotional effects and concern than any significant material damage. Brazil occupies most of the South American pre-Cambrian shield, having a low level of seismic activity typical of intraplate regions. A relation between seismicity and tectonics is complex and not easy to delineate. Nevertheless, it is possible to infer the existence of the following seismotectonic regions : The Southeast region, the Northeast region, the Paraguay-Araguaia region, the Amazonas region, the Southeast Oceanic region, the Recóncavo Baiano region, and the North of Maranhá o region (AU).

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