Stress drops for foreshocks and aftershocks of the 1979 Petatlán, Mexico, earthquake
Stress drops for foreshocks and aftershocks (3.5 ~ ML ~ 4.0) of the 1979 Petatlan, Mexico, earthquake (Ms = 7.6) were examined with the purpose of understanding the mechanical properties of rock and the failure process of a very Young subduction zone. The static stress drop was calculated by estimat...
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1991 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Geofísica Internacional |
| Idioma: | español |
| OAI Identifier: | oai:revistagi.geofisica.unam.mx:article/1195 |
| Acceso en línea: | http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/1195 |
| Access Level: | acceso abierto |
| Palabra clave: | Caída de esfuerzos Premonitores Réplicas Temblor de Petatlan Stress drops Foreshocks Aftershocks Petatlan earthquake |
| Sumario: | Stress drops for foreshocks and aftershocks (3.5 ~ ML ~ 4.0) of the 1979 Petatlan, Mexico, earthquake (Ms = 7.6) were examined with the purpose of understanding the mechanical properties of rock and the failure process of a very Young subduction zone. The static stress drop was calculated by estimating the source dimension from the width of the P-wave half-cycle and the seismic moment from a moment-magnitude relation appropriate to the region. Values of stress drop indicate an irregular distribution throughout the aftershock zone and support a two-asperity model in the source area. |
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