Seismotectonic modelling used for seismic hazard and risk assessments requires a complete compreh... more Seismotectonic modelling used for seismic hazard and risk assessments requires a complete comprehension of the geology, tectonics, palaeo-seismology, regional geophysical anomalies, historical and instrumental seismicity, and other neo-tectonic phenomena like, relative plate motions and current tectonic plate stresses. This paper shows progress made in compiling available geospatial data relevant for this kind of modelling at the best resolution available and elaborates their importance in understanding the seismic load for the region. A study of the seismic catalogue reveals that the region in question has a significant level of seismic activity, and ground motion parameters should be incorporated in the design of critical structures. At this stage visual correlations with the seismic catalogues and available geo-data were made in order to ascertain where further analysis is required. From the seismic catalogue, NE-SW coast parallel patterns of seismic occurrence can be seen. This ...
ABSTRACT Historical earthquake information forms a critical dataset for seismo-tectonic investiga... more ABSTRACT Historical earthquake information forms a critical dataset for seismo-tectonic investigations that can be used seismic hazard (SH) investigations of hazardous and high rise structures and national SH maps. This study systematically interrogates historical earthquake data for the region from various sources in order to have a better understanding of the origins of the larger earthquakes. Several previously undocumented earthquakes were found that can supplement the national catalogue. Various sources are postulated as origins of these tremors, namely local sources located in Mtubatuba and offshore sources as in the Mozambique Channel. These results re-emphasise the need to better understand the coastal environment for seismo-tectonic characterisation and to densify the seismic network towards the eastern coastline.
Seismotectonic modelling used for seismic hazard and risk assessments requires a complete compreh... more Seismotectonic modelling used for seismic hazard and risk assessments requires a complete comprehension of the geology, tectonics, palaeo-seismology, regional geophysical anomalies, historical and instrumental seismicity, and other neo-tectonic phenomena like, relative plate motions and current tectonic plate stresses. This paper shows progress made in compiling available geospatial data relevant for this kind of modelling at the best resolution available and elaborates their importance in understanding the seismic load for the region. A study of the seismic catalogue reveals that the region in question has a significant level of seismic activity, and ground motion parameters should be incorporated in the design of critical structures. At this stage visual correlations with the seismic catalogues and available geo-data were made in order to ascertain where further analysis is required. From the seismic catalogue, NE-SW coast parallel patterns of seismic occurrence can be seen. This ...
ABSTRACT Historical earthquake information forms a critical dataset for seismo-tectonic investiga... more ABSTRACT Historical earthquake information forms a critical dataset for seismo-tectonic investigations that can be used seismic hazard (SH) investigations of hazardous and high rise structures and national SH maps. This study systematically interrogates historical earthquake data for the region from various sources in order to have a better understanding of the origins of the larger earthquakes. Several previously undocumented earthquakes were found that can supplement the national catalogue. Various sources are postulated as origins of these tremors, namely local sources located in Mtubatuba and offshore sources as in the Mozambique Channel. These results re-emphasise the need to better understand the coastal environment for seismo-tectonic characterisation and to densify the seismic network towards the eastern coastline.
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Papers by Mayshree Singh