Seismic Activity Rates in the Iberian Peninsula

Crespo Álvarez, María José; Marti Rodriguez, Joaquin y Martinez Cutillas, Francisco J. (2012). Seismic Activity Rates in the Iberian Peninsula. En: "15th World Conference on Earthquake Engineering", 24/09/2012 - 28/09/2012, Lisboa, Portugal. pp. 1-10.


Título: Seismic Activity Rates in the Iberian Peninsula
  • Crespo Álvarez, María José
  • Marti Rodriguez, Joaquin
  • Martinez Cutillas, Francisco J.
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 15th World Conference on Earthquake Engineering
Fechas del Evento: 24/09/2012 - 28/09/2012
Lugar del Evento: Lisboa, Portugal
Título del Libro: 15th World Conference on Earthquake Engineering
Fecha: 2012
Escuela: E.T.S.I. Minas (UPM) [antigua denominación]
Departamento: Ingeniería de Materiales [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Evaluating the seismic hazard requires establishing a distribution of the seismic activity rate, irrespective of the methodology used in the evaluation. In practice, how that activity rate is established tends to be the main difference between the various evaluation methods. The traditional procedure relies on a seismogenic zonation and the Gutenberg-Richter (GR) hypothesis. Competing zonations are often compared looking only at the geometry of the zones, but the resulting activity rate is affected by both geometry and the values assigned to the GR parameters. Contour plots can be used for conducting more meaningful comparisons, providing the GR parameters are suitably normalised. More recent approaches for establishing the seismic activity rate forego the use of zones and GR statistics and special attention is paid here to such procedures. The paper presents comparisons between the local activity rates that result for the complete Iberian Peninsula using kernel estimators as well as two seismogenic zonations. It is concluded that the smooth variation of the seismic activity rate produced by zoneless methods is more realistic than the stepwise changes associated with zoned approaches; moreover, the choice of zonation often has a stronger influence on the results than its fairly subjective origin would warrant. It is also observed that the activity rate derived from the kernel approach, related with the GR parameter “a”, is qualitatively consistent with the epicentres in the catalogue. Finally, when comparing alternative zonations it is not just their geometry but the distribution of activity rate that should be compared.

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Depositado por: Memoria Investigacion
Depositado el: 03 Oct 2013 08:47
Ultima Modificación: 22 Sep 2014 11:21
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