Geotechnical reconnaissance findings of the October 30 2020, Mw7.0 Samos Island (Aegean Sea) earthquake

Download

index.pdf

Date

2022-11-01

Author

Ziotopoulou, Katerina
Çetin, Kemal Önder
Pelekis, Panagiotis
Altun, Selim
Klimis, Nikolaos
SEZER, ALPER
Rovithis, Emmanouil
Yılmaz, Mustafa Tolga
Papadimitriou, Achilleas G.
Gülerce, Zeynep
Can, Gizem
Ilgaç, Makbule
Çakır, Elife
Söylemez, Berkan
Al-Suhaily, Ahmed
Elsaid, Alaa
Zarzour, Moutasem
Ecemis, Nurhan
Unutmaz, Berna
Kockar, Mustafa Kerem
Akgun, Mustafa
Kincal, Cem
Bayat, Ece Eseller
Ozener, Pelin Tohumcu
Stewart, Jonathan P.
Mylonakis, George

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

130
views

62
downloads

On October 30, 2020 14:51 (UTC), a moment magnitude (Mw) of 7.0 (USGS, EMSC) earthquake occurred in the Aegean Sea north of the island of Samos, Greece. Turkish and Hellenic geotechnical reconnaissance teams were deployed immediately after the event and their findings are documented herein. The predominantly observed failure mechanism was that of earthquake-induced liquefaction and its associated impacts. Such failures are presented and discussed together with a preliminary assessment of the performance of building foundations, slopes and deep excavations, retaining structures and quay walls. On the Anatolian side (Turkey), and with the exception of the Izmir-Bayrakli region where significant site effects were observed, no major geotechnical effects were observed in the form of foundation failures, surface manifestation of liquefaction and lateral soil spreading, rock falls/landslides, failures of deep excavations, retaining structures, quay walls, and subway tunnels. In Samos (Greece), evidence of liquefaction, lateral spreading and damage to quay walls in ports were observed on the northern side of the island. Despite the proximity to the fault (about 10 km), the amplitude and the duration of shaking, the associated liquefaction phenomena were not pervasive. It is further unclear whether the damage to quay walls was due to liquefaction of the underlying soil, or merely due to the inertia of those structures, in conjunction with the presence of soft (yet not necessarily liquefied) foundation soil. A number of rockfalls/landslides were observed but the relevant phenomena were not particularly severe. Similar to the Anatolian side, no failures of engineered retaining structures and major infrastructure such as dams, bridges, viaducts, tunnels were observed in the island of Samos which can be mostly attributed to the lack of such infrastructure.

Subject Keywords

Reconnaissance, Samos earthquake, Liquefaction, Lateral spreading, Slopes, Retaining structures, Foundations, Seismic performance, FIELD OBSERVATIONS, GREECE, Foundations, Lateral spreading, Liquefaction, Reconnaissance, Retaining structures, Samos earthquake, Seismic performance, Slopes

URI

https://hdl.handle.net/11511/101844

Journal

Bulletin of Earthquake Engineering

DOI

https://doi.org/10.1007/s10518-022-01520-x

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

24 January 2020, Sivrice-Elazig-Turkey Earthquake Reconnaissance Report Çetin, Kemal Önder; Ilgaç, Makbule; Can, Gizem; Çakır, Elife; Söylemez, Berkan (2020-2-19) On January 24, 2020 20:55:11 (UTC), a moment magnitude Mw 6.8 (AFAD) or 6.7 (USGS) earthquake occurred on the East Anatolian Fault zone, due to a NE-SW strike-slip fault rupture along the Sivrice-Pütürge Segment in Elazığ, Turkey. Within the confines of this project, the findings of geological, seismological and geotechnical and structural reconnaissance studies as well as preliminary field investigation studies are published. In addition to geological and geotechnical evaluations in the course of reconna...
Seismic performance of mid-rise reinforced concrete buildings in Izmir Bayrakli after the 2020 Samos earthquake Demirel, Ismail Ozan; Yakut, Ahmet; Binici, Barış (2022-07-01) © 2022 Elsevier LtdOn October 30th 2020, offshores of Samos Island, Greece was hit by a shallow earthquake of Mw = 6.9 moment magnitude. Located 76 km away from the earthquake's epicenter, the mid-rise reinforced concrete (RC) building stock of the densely populated Izmir Bayrakli district experienced the most severe structural damage. Although the horizontal peak ground acceleration recorded at the site (PGA = 0.11 g) was well below design values recommended by the past and the present Turkish seismic code...
Reconnaissance of 2020 M 7.0 Samos Island (Aegean Sea) earthquake Çetin, Kemal Önder; Sextos, Anastasios; Stewart, Jonathan P. (2021-08-01) The Samos Island (Aegean Sea) Earthquake occurred on 30 October 2020. It produced a tsunami that impacted coastal communities, ground shaking that was locally amplified in some areas and that led to collapse of structures with 118 fatalities in both Greece and Turkey, and wide-ranging geotechnical effects including rockfalls, landsliding, and liquefaction. As a result of the global COVID-19 pandemic, the reconnaissance of this event did not involve the deployment of international teams, as would be typical ...
Real-time experimental forecast of the Peruvian tsunami of August 2007 for US coastlines Wei, Yong; Bernard, Eddie N.; Tang, Liujuan; Weiss, Robert; Titov, Vasily V.; Moore, Christopher; Spillane, Michael; Hopkins, Mike; Kanoğlu, Utku (American Geophysical Union (AGU), 2008-02-27) At 23: 41 UTC on 15 August 2007, an offshore earthquake of magnitude 8.0 severely damaged central Peru and generated a tsunami. Severe shaking by the earthquake collapsed buildings throughout the region and caused 514 fatalities. The tsunami resulted in three casualties and a representative maximum runup height of similar to 7 m in the near field. The first real-time tsunami data available came from a deep-ocean tsunami detection buoy within 1 hour of tsunami generation. These tsunami data were used to prod...
Geotechnical aspects of reconnaissance findings after 2020 January 24th, M6.8 Sivrice–Elazig–Turkey earthquake Çakır, Elife; Çetin, Kemal Önder; Ilgaç, Makbule; Can, Gizem; Elsaid, Alaa; Söylemez, Berkan; Cuceoglu, Faik; Gülerce, Zeynep; Aydin, Seckin; Askan Gündoğan, Ayşegül; Gor, Mesut (2021-01-01) On January 24, 2020, Sivrice–Elazig–Turkey earthquake occurred along the East Anatolian Fault Zone. The moment magnitude of the event was reported as 6.8. This paper documents reconnaissance findings performed immediately after the event. Investigated sites namely, Lake Hazar shores, Karakaya Dam Reservoir–Euphrates River shores, Malatya–Battalgazi district and its villages, and Elazig Downtown are predicted to be shaken by rock peak ground acceleration, PGAVS30=1100 m/s, levels of 0.12–0.42 g, 0.05–0.11 g,...

Citation Formats

K. Ziotopoulou et al., “Geotechnical reconnaissance findings of the October 30 2020, Mw7.0 Samos Island (Aegean Sea) earthquake,” Bulletin of Earthquake Engineering, vol. 20, no. 14, pp. 7819–7852, 2022, Accessed: 00, 2023. [Online]. Available: https://hdl.handle.net/11511/101844.