First-order regional seismotectonic model for South Africa

Show simple item record Singh, Mayshree Kijko, Andrzej 2012-05-17T11:13:49Z 2012-05-17T11:13:49Z 2011-10
dc.description.abstract A 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.librarian nf2012 en
dc.description.sponsorship The Council for Geoscience (CGS) and the National Research Foundation. en_US
dc.description.uri en_US
dc.description.uri en_US
dc.identifier.citation Singh, M,& Kijko, A 2011, 'First-order regional seismotectonic model for South Africa', Natural Hazards, vol. 59, no. 1, pp. 383-400. en
dc.identifier.issn 0921-030X (print)
dc.identifier.issn 573-0840 (online)
dc.identifier.other 10.1007/s11069-011-9762-3
dc.language.iso en en_US
dc.publisher Springer en_US
dc.rights © Springer Science+Business Media B.V. 2011 en_US
dc.subject Seismotectonic model en
dc.subject Seismicity en
dc.subject Zonation en
dc.subject.lcsh Seismology -- South Africa -- Instruments en
dc.subject.lcsh Earthquake zones -- South Africa en
dc.title First-order regional seismotectonic model for South Africa en
dc.type Postprint Article en

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