First-order regional seismotectonic model for South Africa

dc.contributor.authorSingh, Mayshree
dc.contributor.authorKijko, Andrzej
dc.contributor.emailandrzej.kijko@up.a.zaen_US
dc.date.accessioned2012-05-17T11:13:49Z
dc.date.available2012-05-17T11:13:49Z
dc.date.issued2011-10
dc.description.abstractA first-order seismotectonic model was created for South Africa. This was done using four logical steps: geoscientific data collection, characterisation, assimilation and zonation. Through the definition of subunits of concentrations of earthquake foci and large neotectonic and structural domains, seismotectonic structures, systems and domains were created. Relatively larger controls of seismicity exist between the Great Escarpment and the coast. In the south, this region is characterised by large aeromagnetic anomalies and large EW trending faults. In the west, it is characterised by the NW–SE trending Wegener stress anomaly, radial-trending dykes and earthquake clusters. In the east, it is characterised by a large neotectonic domain where several large historical earthquakes occurred. In the centre of South Africa, several clusters of earthquake activity are found, often related to mining activity. Further north, seismicity is related to both mining activity and neotectonic deformation. This work contributes to the development of a seismotectonic model for South Africa by (1) bringing together, digitally, several data sets in a common GIS platform (geology, geophysics, stress, seismicity, neotectonics, topography, crustal and mantle structure and anisotropy), (2) understanding the significance of data sets for seismotectonic zonation and limitations thereof and (3) obtaining a reasonable regional model for use in seismic hazard assessments.en
dc.description.librariannf2012en
dc.description.sponsorshipThe Council for Geoscience (CGS) and the National Research Foundation.en_US
dc.description.urihttp://www.springer.com/earth+sciences+and+geography/hydrogeology/journal/11069en_US
dc.description.urihttp://www.springerlink.com/content/0921-030x/en_US
dc.identifier.citationSingh, M,& Kijko, A 2011, 'First-order regional seismotectonic model for South Africa', Natural Hazards, vol. 59, no. 1, pp. 383-400.en
dc.identifier.issn0921-030X (print)
dc.identifier.issn573-0840 (online)
dc.identifier.other10.1007/s11069-011-9762-3
dc.identifier.urihttp://hdl.handle.net/2263/18774
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.rights© Springer Science+Business Media B.V. 2011en_US
dc.subjectSeismotectonic modelen
dc.subjectSeismicityen
dc.subjectZonationen
dc.subject.lcshSeismology -- South Africa -- Instrumentsen
dc.subject.lcshEarthquake zones -- South Africaen
dc.titleFirst-order regional seismotectonic model for South Africaen
dc.typePostprint Articleen

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