30. Ekim. 2020, Mw 6.6 Samos Depremi Kuvvetli Yer Hareketlerinin Yorumlanması ve Yakındaki Yapıların Deprem Sonrası Durumu

Öz

30 Ekim 2020’de Ege denizi açıklarında, merkez üssü Sisam/Samos Adası’nın kuzeyinde bulunan Yunanistan’ın Neon Karlovasion kentinin açıklarında 6.6 büyüklüğünde bir deprem meydana gelmiştir. Deprem farklı kurumlar tarafından 6.6, 6.9 ve 7.0 gibi çeşitli şekillerde rapor edilmiştir. Bu çalışmada, yer hareketlerinin özelliklerini araştırmak için merkez üssünden 150 km'ye kadar olan bir mesafedeki kuvvetli yer hareketi kayıtları analiz edilmiştir. Deprem sonrası saha gözlemleri ağırlıklı olarak orta yükseklikteki betonarme yapılar için rapor edilmiştir. Hasarın mekansal dağılımı Bayraklı, Bornova ve Karşıkaya bölgelerinde bir havza etkisine işaret etmektedir. Ana ve artçı sarsıntılardan etkilenen 8-10 katlı orta katlı binalar ve tsunamiden etkilenen İzmir'in kuzey kıyıları bu depremin başlıca gözlemleridir.

Anahtar Kelimeler

• Samos depremi
• deprem kayitlari
• GMMs
• .hasar dağılımı

The 30 October 2020, Mw 6.6 Sisam (Samos) Earthquake: Interpretation of Strong Ground Motions and Post-Earthquake Condition of Nearby Structures

Öz

A major magnitude Mw 6.6 earthquake struck offshore of the city of İzmir, Turkey and the city of Neon Karlovasion, Greece which has the epicenter located at north of Sisam/ Samos Island in the eastern Agean Sea on October 30th, 2020. The moment magnitude of the earthquake has been reported variously, such as 6.6, 6.9 and 7.0 by different agencies. Seismic instruments indicate the earthquake originated at a depth of 17.2 and 21 kilometers according to the Disaster and Emergency Management Presidency (AFAD) of Turkey and USGS. Doğanbey Payamlı, Ürkmez, Gümüldür, Kavakdere are the closest coastal villages of İzmir to the epicenter. The earthquake affected the mid-rise buildings located on the soft soil and then, tsunami stroked the coastal villages of İzmir. In this study, the strong ground motion records in a distance range from epicenter to 150 km are analyzed to investigate the characteristic of the ground motions. The post-earthquake field observations mainly for the mid-rise reinforced concrete structures are reported. The spatial distribution of the damage indicates a basin effect within the Bayraklı, Bornova and Karşıkaya regions. The 8-10 story mid-rise buildings affected from the main and aftershocks and the north coasts of İzmir affected from the tsunami were the main observations of this earthquake.

Anahtar Kelimeler

• Samos earthquake
• strong ground motion records
• GMMs
• damage distribution

Teşekkür

The author(s) wants to show their gratitude to Ozan Öğünç and Mehmet Artun Baki for their helps while gathering the station data for this study.

Kaynakça

1. Akansel, V., Ameri, G., Askan, A., Caner, A., Erdil, B., Kale, Ö., & Okuyucu, D. (2014). The 23 October 2011 Mw 7.0 Van (Eastern Turkey) earthquake: Interpretations of recorded strong ground motions and post-earthquake conditions of nearby structures. Earthquake Spectra, 30(2), 657-682. Ulusay, R., Tuncay, E., Sonmez, H., & Gokceoglu, C. (2004). An attenuation relationship based on Turkish strong motion data and iso-acceleration map of Turkey. Engineering Geology, 74(3-4), 265-291.