A new coda-duration magnitude scale for northern Baja California, Mexico
In northern Baja California, coda-durations of seismic signals recorded in the sediments of the Mexicali-Imperial Valley(MIV) are longer than those recorded on the granitic Peninsular Ranges of Baja California (PRBC). The source-receiver distanceand the local geology conditions also affect coda dura...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2005 |
| País: | México |
| Institución: | Centro de Investigación Científica y de Educación Superior de Ensenada |
| Repositorio: | Redalyc-CICESE |
| OAI Identifier: | oai:redalyc.org:56844102 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=56844102 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias de la Tierra coda duration Duration magnitude station correction |
| Sumario: | In northern Baja California, coda-durations of seismic signals recorded in the sediments of the Mexicali-Imperial Valley(MIV) are longer than those recorded on the granitic Peninsular Ranges of Baja California (PRBC). The source-receiver distanceand the local geology conditions also affect coda duration. Using data from earthquakes in the 1.8-to-5.8-magnitude range, weperformed a multiple regression analysis to get two new duration magnitude relationships as follows: MD = - (1.56 ± 0.21) + (2.44± 0.13) log τ + (0.0023 ± 0.0004)τ + S, for PRBC, and MD = - (1.27 ± 0.38) + (2.31 ± 0.20) log τ + (0.0012 ± 0.0004)τ + S, forMIV, where τ and S are lapse-time values and station corrections, respectively. Station corrections range from -0.60 to +0.19. Thenew magnitudes are calibrated with a local magnitude scale previously defined for the region. |
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