Journal
NATURAL HAZARDS
Volume 50, Issue 2, Pages 403-408Publisher
SPRINGER
DOI: 10.1007/s11069-008-9332-5
Keywords
Isoseismal; Intensity; South Africa
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An atlas of isoseismal maps for South Africa, dating from as far back as 1932-2005, is provided. This work involved searching through historical reports to find records of macroseismic effects. In many instances, when there was a large tremor, questionnaires were distributed to local towns to assess the severity of the tremor and the damage it caused. Based on the results of these questionnaires and site investigations, isoseismal maps were drawn. These isoseismal maps were revisited and digitised for this study. Five additional isoseismal maps were prepared by the authors based on the results of questionnaires alone. Most isoseismal maps in the historical record use the Modified Mercalli scale. All maps are hence provided according to this scale.
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