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Description:
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Ayşegül Askan, Middle East Technical University
On Feburary 6, 2023, two earthquakes with M7.8 and M7.5 occurred in Southeastern Türkiye only hours apart and caused significant damage and fatalities. The effects of these events were very widespread with complex source and site effects as well as major geotechnical and structural damages. The mainshocks and their aftershock sequences were recorded in a large region by the national strong motion network of Türkiye, operated by AFAD. This presentation will provide a general initial assessment of the earthquakes, focusing mainly on the strong ground motions and examples of observed damages. Initially, the regional tectonics, past seismic activity in the area and characteristics of the recorded strong motions of the will be highlighted. Next, comparisons of observed data against the most recent design spectra and selected ground motion models will be presented. Field observations of common geotechnical and structural damages will be briefly demonstrated. Finally, implications for future hazard assessments, possible building code updates and risk mitigation practices will be discussed. |
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