Fault rupture directivity of large earthquakes in Himalaya
| Autor: | Mithila Verma, Brijesh K. Bansal, H. N. Srivastava |
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| Rok vydání: | 2018 |
| Předmět: |
geography
geography.geographical_feature_category Hydrogeology 010504 meteorology & atmospheric sciences Engineering structures Right angle Geology Fault (geology) 010502 geochemistry & geophysics 01 natural sciences Directivity Strong ground motion Plate tectonics Large earthquakes Seismology 0105 earth and related environmental sciences |
| Zdroj: | Journal of the Geological Society of India. 91:9-14 |
| ISSN: | 0974-6889 0016-7622 |
| DOI: | 10.1007/s12594-018-0814-0 |
| Popis: | The paper examines the predominant fault rupture directivity during large earthquakes in different sectors of the Himalaya which influences strong ground motion and damage scenario. The nature of the faulting of earthquakes vis-a-vis their rupture directivity has been discussed. It is found that the rupture directivity near the Indo-Eurasian plate boundary varies from place to place i.e. either along the strike direction of the faults or at right angles to it. The secondary meizoseismal areas as observed for 1505 Dharchula, 1803 Uttarakhand, 1905 Kangra earthquakes in the Himalaya and 2001 Bhuj earthquake in stable continental region suggest that they are a fairly good indicator of predominant rupture directivity since the latter accentuates the site response up to a longer distance. The resulting larger ground motions, therefore, need to be incorporated in the design of engineering structures by suitable modifications in the BIS code. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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