Título

Magnitude determination of Mexican earthquakes

Autor

Shri Krishna Singh

Nivel de Acceso

Acceso Abierto

Resumen o descripción

We explore two altemative magnitude scales, MA and ME, for quasi-real time estimate of magnitude of moderate and large Mexican earthquakes using broadband recordings at Ciudad Universitaria (CU), Mexico D.F., Mexico. MA and Me are based on amplitude of band-pass filtered (between 15 and 30 sec) velocity traces and estimate of radiated seismic energy, respectively. Both scales are tied to the moment magnitude, MW. MA is adequate for shallow, moderate, and large earthquakes, but appears to saturate for major and great earthquakes. ME, on the other hand, does not suffer from saturation and should be valid for events of all depths. In as much as MA measures long-period characteristics of an event while the contribution to ME mostly comes from frequencies near the comer frequency of the event, the magnitude on the two scales may differ for the same earthquake, even if MA has not saturated. Since a large disparity in the two magnitudes may be indicative of anomalous nature of an earthquake, we recommend the use of both scales whenever possible.

Editor

UNAM, Instituto de Geofísica

Fecha de publicación

1994 1 de abril de 1994

Tipo de publicación

Artículo

Versión de la publicación

Versión publicada

Recurso de información

http://rigeofisica.ssn.unam.mx/jspui/handle/ssnmx/14560

Singh, S. K.,

&

Pacheco, J. F. (1994). Magnitude determination of Mexican earthquakes. Geofísica Internacional, 33(2), 189-198. http://dx.doi.org/10.22201/igeof.00167169p.1994.33.2.468

Formato

pdf

Fuente

http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/468

Idioma

Inglés

Relación

Geofísica Internacional

0016-7169

Repositorio Orígen

Repositorio de Literatura del Servicio Sismológico Nacional

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