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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional Autónoma de México
1999
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| Online Access: | https://www.redalyc.org/articulo.oa?id=56838105 |
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Table of Contents:
- Distribution of (mb - Ms) of moderate earthquakes along the Mexican seismic zone Vyacheslav M. Zobin Ciencias de la Tierra Mexico magnitude Earthquake subduction We study the spatial distribution of mb-Ms for 55 earthquakes from 1978 to 1994 with focal depth from 0 to 80 km, mb from4.5 to 5.5, which occurred along the Middle America trench, between 95° to 107° W. The mb-Ms values have a bimodal distribution,with peaks at values of 0.3 and 0.8 and minimum at mb-Ms=0.6. Events of the first group, mb-Ms <0.6, were distributed along thetrench over the whole region, and events of the second group, mb-Ms ³ 0.6, were found mainly in the central part of the region,within the Guerrero block. These data show that the Oaxaca block consists of a relatively homogeneous lithosphere, where lowfrequencyevents dominate, while the Guerrero block is more complex radiating both low- and high-frequency events. 1999 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56838105 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.38