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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Universidad Nacional Autónoma de México
2005
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=56844102 |
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Sommario:
- A new coda-duration magnitude scale for northern Baja California, Mexico Antonio Vidal Luis Munguía Ciencias de la Tierra coda duration Duration magnitude station correction 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. 2005 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56844102 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.44