Determinación de parámetros focales del temblor de Huajuapan de León, Oaxaca, del 24 de octubre de 1980, usando sismogramas sintéticos de ondas compresionales y un método de inversión linealizada
Long period compressional body waves of the Huajuapan de León, Oaxaca, México earthquake (October 24, 1980, mb = 6.6, Ms = 7 .0) have been modeled by using a synthetic seismogram algorithm based on the WKBJ approximation and a linearized inversion method for fitting source parameters. This method re...
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1984 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Geofísica Internacional |
| Idioma: | español |
| OAI Identifier: | oai:revistagi.geofisica.unam.mx:article/1019 |
| Acceso en línea: | http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1019 |
| Access Level: | acceso abierto |
| Palabra clave: | Sismicidad Sismogramas sintéticos Método de Inversión linealizada Terremotos Huajuapán de León-Oaxaca Seismicity Synthetic seismograms Linearized inversion method Earthquakes |
| Sumario: | Long period compressional body waves of the Huajuapan de León, Oaxaca, México earthquake (October 24, 1980, mb = 6.6, Ms = 7 .0) have been modeled by using a synthetic seismogram algorithm based on the WKBJ approximation and a linearized inversion method for fitting source parameters. This method results to be efficient and stable in determining the physical parameters of the model. The resulting focal mechanism (cp¡ = 279°, ó 1 = 22°, 71. 1 = -89°, ~2= 100º, ó2 = 68°, i\2 = -89°) corresponds to a normal fault type mechanism similar to the one proposed by Jiménez et al. (1982). The solution indica tes a source depth of 60 km, well correlated with aftershock locations, a seismic moment of 1.2 1027dyne.cm anda rupture time of 13.5 sec. A triangular time function in velocity is sufficient to obtain a good fitting. It indicates a simple rupture history for periods greater than 1 O sec. |
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