Effects of the Alluvial Geomorphology on the Damage of the Sisam Earthquake in the Bornova Plain
On October 30, 2020, an earthquake struck the offshore region of the north of Samos Island, in the Gulf of Kuşadası with a magnitude of 6.9. According to damage reports, Bayrakli and Bornova districts were the most affected areas by the earthquake based on the extent of damage and loss. This study a...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Istanbul University Press
2021-06-01
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| Series: | Coğrafya Dergisi |
| Subjects: | |
| Online Access: | https://cdn.istanbul.edu.tr/file/JTA6CLJ8T5/DFFA6E57C7A043B8BAD726BF4E5B7996 |
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| Summary: | On October 30, 2020, an earthquake struck the offshore region of the north of Samos Island, in the Gulf of Kuşadası with a magnitude of 6.9. According to damage reports, Bayrakli and Bornova districts were the most affected areas by the earthquake based on the extent of damage and loss. This study aims to evaluate the effects of alluvial properties of the Bornova Plain on the distribution of earthquake damage. The address-based damage reports of the Ministry of Environment and Urbanization and findings of previous studies on the alluvial characteristics of the Bornova Plain were used to interpret the damage distribution. In the study, the damaged building locations were transferred on satellite images and sedimentological-stratigraphic cross-sections. The sedimentological-stratigraphic data of the nine core drillings made in the coastal part of the Bornova Plain presented in the previous studies were associated with the earthquake damage. Alluvial changes related to the Holocene transgression in alluvial stratigraphy present various conditions by means of durability. Six of the collapsed buildings and most of the damaged buildings are located in the mid-Holocene transgression area. In recent years, as an urban renewal area, this field has turned into an area of high-rise apartment blocks and towers. Such change may increase the possibility of earthquake risks. In this regard, it is important to determine the characteristics of the alluviums that form in the alluvial areas surrounding the İzmir bay. |
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| ISSN: | 1305-2128 |