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Implementation and validation of an approach for the estimation of the magnitude of historical earthquakes in Azores Islands

2021-02Journal article Restricted access
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dc.contributor.authorFuentes Morais, Eduardo José de Azevedo Charters
dc.contributor.authorFerreira, Tiago Miguel
dc.contributor.authorEstêvão, João M. C.
dc.contributor.authorOliveira, Carlos Sousa
dc.date.accessioned2021-02-02T18:33:29Z
dc.date.available2021-02-02T18:33:29Z
dc.date.issued2021-02
dc.description.abstractIn many regions of the globe, the seismic data associated with higher magnitude seismic events usable in the characterization of the seismic hazard is scarce. Therefore, seismologists have been estimating the magnitude and probable epicentral location of historical earthquakes using the historical records and intensity scales to map the observed damage. Another method, employed by earthquake engineers, uses fragility functions, a ground motion model and the Bayes’ theorem to estimate the probable magnitude of historical seismic events. Nevertheless, this method requires assembling an approach consistent with the local seismicity and building stock of the period of reference. This paper implements and validates an approach for the estimation of the magnitude of historical seismic events in Azores Islands, Portugal, that uses fragility functions. In order to carry out this study, data from the damage surveys, a vulnerability distribution and approximate epicentral positions of the 1998 Faial earthquake Mw = 6.0–6.2, as well as a specific attenuation model, are utilized in a calibration phase. The vulnerability index methodology is employed to derive fragility functions from a detailed vulnerability assessment. Afterwards, the approach is validated using analogous data corresponding to the 1980 Terceira earthquake Mw = 6.8–7.2. The different assumptions and results are discussed and compared. The results show that this approach can model expected magnitude values with accuracy: Mw = 6.01–5.76 for the 1998 Faial and Mw = 6.90–6.55 for the 1980 Terceira earthquakes. Additionally, the real PGAs may have been in several locations lower than those predicted by the selected ground motion equation.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMorais, Eduardo Charters; Ferreira, Tiago Miguel; Estevão, João M.C.; Oliveira, Carlos Sousa. "Implementation and Validation of an Approach for the Estimation of the Magnitude of Historical Earthquakes in Azores Islands". International Journal of Disaster Risk Reduction 53 (2021): 102000. doi: 10.1016/j.ijdrr.2020.102000pt_PT
dc.identifier.doi10.1016/j.ijdrr.2020.102000pt_PT
dc.identifier.issn2212-4209
dc.identifier.urihttp://hdl.handle.net/10400.1/15020
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevier
dc.subjectHistorical earthquakespt_PT
dc.subjectSeismic vulnerabilitypt_PT
dc.subjectFragility functionspt_PT
dc.subject1980 Terceira earthquakept_PT
dc.subject1998 Faial earthquakept_PT
dc.titleImplementation and validation of an approach for the estimation of the magnitude of historical earthquakes in Azores Islandspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage102000pt_PT
oaire.citation.titleInternational Journal of Disaster Risk Reductionpt_PT
oaire.citation.volume53pt_PT
person.familyNameEstêvão
person.givenNameJoão Manuel Carvalho
person.identifierLh0jYe0AAAAJ&hl
person.identifier.ciencia-id001A-8761-A164
person.identifier.orcid0000-0002-7356-9893
person.identifier.scopus-author-id56268965500
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication39e5f28b-fdf6-4823-b622-87f4177dd013
relation.isAuthorOfPublication.latestForDiscovery39e5f28b-fdf6-4823-b622-87f4177dd013

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