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Incorporating descriptive metadata into seismic source zone models for seismic-hazard assessment; a case study of the Azores-west Iberian region

Susana P. Vilanova, Eliza S. Nemser, Glenda M. Besana-Ostman, Mourad Bezzeghoud, Jose F. Borges, Antonio Brum da Silveira, Joao Cabral, Joao Carvalho, Pedro P. Cunha, Ruben P. Dias, Jose Madeira, Fernando C. Lopes, Carlos S. Oliveira, Hector Perea, Julian Garcia-Mayordomo, Ivan Wong, Ronald Arvidsson and Joao F. B. D. Fonseca
Incorporating descriptive metadata into seismic source zone models for seismic-hazard assessment; a case study of the Azores-west Iberian region
Bulletin of the Seismological Society of America (June 2014) 104 (3): 1212-1229

Abstract

In probabilistic seismic-hazard analysis (PSHA), seismic source zone (SSZ) models are widely used to account for the contribution to the hazard from earthquakes not directly correlated with geological structures. Notwithstanding the impact of SSZ models in PSHA, the theoretical framework underlying SSZ models and the criteria used to delineate the SSZs are seldom explicitly stated and suitably documented. In this paper, we propose a methodological framework to develop and document SSZ models, which includes (1) an assessment of the appropriate scale and degree of stationarity, (2) an assessment of seismicity catalog completeness-related issues, and (3) an evaluation and credibility ranking of physical criteria used to delineate the boundaries of the SSZs. We also emphasize the need for SSZ models to be supported by a comprehensive set of metadata documenting both the unique characteristics of each SSZ and the criteria used to delineate its boundaries. This procedure ensures that the uncertainties in the model can be properly addressed in the PSHA and that the model can be easily updated whenever new data are available. The proposed methodology is illustrated using the SSZ model developed for the Azores-West Iberian region in the context of the Seismic Hazard Harmonization in Europe project (project SHARE) and some of the most relevant SSZs are discussed in detail.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 104
Serial Issue: 3
Title: Incorporating descriptive metadata into seismic source zone models for seismic-hazard assessment; a case study of the Azores-west Iberian region
Affiliation: Universidade de Lisboa, Centre for Natural Resources and the Environment, Lisboa, Portugal
Pages: 1212-1229
Published: 201406
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 80
Accession Number: 2014-051929
Categories: SeismologyEnvironmental geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 7 tables, geol. sketch maps
N37°00'00" - N40°00'00", W31°00'00" - W25°00'00"
N36°00'00" - N43°49'60", W09°30'00" - E03°19'60"
Secondary Affiliation: URS Corporation, USA, United StatesUniversidade de Evora, PRT, PortugalLaboratorio Nacional de Energia e Geologia, PRT, PortugalUniversidade de Coimbra, PRT, PortugalBarcelona Center for Subsurface Imaging, ESP, SpainInstituto Geologico y Minero de Espana, ESP, SpainGerman Research Center for Geosciences, DEU, Germany
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201428
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