Memorias de investigación
Ponencias en congresos:
SEISMIC HAZARD IN ANDALUSIA REGION (SOUTHERN SPAIN)
Año:2008
Áreas de investigación
  • Geofísica
Datos
Descripción
The global objective of the SISMOSAN Project has been to provide a general seismic risk assessment of Andalusian region (Southern Spain) associated with the ground motions expected for a return period of 475 years. The project was financed by Civil Defence of Andalusia and its results will be applied to the definition of regional emergency plans. We present here the study and main results of the first phase of the project, aimed at evaluating seismic hazard. In contrast to most of the previous studies in the region, which were performed for peak ground accelerations (PGA) making use of Intensity-to-PGA relationships, hazard was here calculated in terms of magnitude and using published spectral ground-motion models. Moreover, we have considered distinct models for the Atlantic earthquakes, since the attenuation of those motions seem to be slower, as evidenced by the extensive macroseismic areas of the 1755, 1969 and 2007 earthquakes. A comprehensive revision of the seismic catalogue, as well as of the seismogenic models proposed for the region (including those for North Africa, which is part of the influence area) has been done. In a first step, seismic hazard was evaluated at generic rock sites covering the entire region, using a seismic catalogue homogenized to moment magnitude and considering attenuation models in terms of PGA and spectral ordinates (SA). A Probabilistic Seismic Hazard Assessment (PSHA) methodology was followed using a logic tree, in order to constrain the epistemic uncertainty, including two nodes for different options of zonification and attenuation models. In a second step, a geotechnical characterization of the whole region has been carried out, mainly inferred from geological maps and refined with on-site data, which are combined with rock acceleration estimates, in order to compose hazard maps that incorporate local soil effects.
Internacional
Si
Nombre congreso
14th World Conference Earthquake Engineering
Tipo de participación
960
Lugar del congreso
Pekín (China)
Revisores
Si
ISBN o ISSN
9999-99-999-9
DOI
Fecha inicio congreso
12/10/2008
Fecha fin congreso
17/10/2008
Desde la página
180
Hasta la página
180
Título de las actas
Conference Proceedings
Esta actividad pertenece a memorias de investigación
Participantes
  • Participante: Ana Góngora Universida Almería
  • Participante: María José García Rodríguez UPM
  • Participante: José Manuel Martínez Solares Instituto Geográfico Nacional
  • Autor: Jorge Miguel Gaspar Escribano UPM
  • Participante: Francisco Vidal Instituto Andaluz de Geofísica
  • Autor: Maria Belen Benito Oterino UPM
  • Participante: Manuel Navarro Universida Almería
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Ingeniería Sísmica: Dinámica de Suelos y Estructuras
  • Departamento: Ingeniería Topográfica y Cartografía