Artículo

Magnitude determination of Mexican earthquakes

Singh, S. K.; Pacheco, J. F.

Instituto de Geofísica, UNAM, publicado en Geofísica Internacional, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Instituto de Geofísica, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Singh, Shri Krishna, et al. (1994). Magnitude determination of Mexican earthquakes. Geofísica Internacional; Vol. 33 No. 2, 1994. Recuperado de https://repositorio.unam.mx/contenidos/42277

Descripción del recurso

Autor(es)
Singh, S. K.; Pacheco, J. F.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Magnitude determination of Mexican earthquakes
Fecha
2012-05-28
Resumen
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.
Tema
Escala de magnitud; energía sísmica; amplitud.; Magnitude scále; seismic energy; amplitude.
Idioma
spa
ISSN
0016-7169

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