23 Ekim 2011 Van (Doğu Anadolu) Depremi'nin (Mw=7.1) Sismotektonik Özellikleri

Utkucu, Murat; Budakoğlu, Emrah; Yalçın, Hilal; Durmuş, Hatice; Gülen, Levent; Işık, Ercan

doi:10.17824/huyuamd.60718

Cited by 9 publications

(6 citation statements)

References 4 publications

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“…2) and for the aftershocks of the 2011 Van earthquake ( Fig. 3; Table 3), Utkucu et al (2013b) Utkucu et al (2013b) resulted in virtually the same stress changes shown in Fig. 6a-b, suggesting moderate variations of the regional stress regime do not result in much change in the stress calculations.…”

Section: The Spatial Pattern Of the Aftershocks Versus The Mainshock mentioning

confidence: 69%

Coulomb static stress changes before and after the 23 October 2011 Van, eastern Turkey, earthquake (MW= 7.1): implications for the earthquake hazard mitigation

Utkucu

Durmuş

Yalçın

et al. 2013

Nat. Hazards Earth Syst. Sci.

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Abstract. Coulomb stress changes before and after the 23 October 2011 Van, eastern Turkey, earthquake have been analysed using available data related to the background and the aftershock seismicity and the source faults. The coseismic stress changes of the background seismicity had slightly promoted stress over the rupture plane of the 2011 Van earthquake, while it yielded a stress shadow over the Gürpı nar Fault which has been argued to have produced the 7 April 1646 Van earthquake. The stress shadow over the Gürp\\i nar fault has become more pronounced following the occurrence of the 2011 Van earthquake, meaning that the repetition of the 1646 Van earthquake has been further suppressed. Spatial distribution and source mechanisms of the 2011 Van earthquake's aftershocks have been utilised to define four clusters with regard to their relative location to the mainshock rupture. In addition, the aftershock sequence covers a much broader area toward the northeast. Correlations between the observed spatial patterns of the aftershocks and the coseismic Coulomb stress changes caused by the mainshock are determined by calculating the stress changes over both optimally oriented and specified fault planes. It is shown here that there is an apparent correlation between the mainshock stress changes and the observed spatial pattern of the aftershock occurrence, demonstrating the usefulness of the stress maps in constraining the likely locations of the upcoming aftershocks and mitigating earthquake hazard.

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Section: The Spatial Pattern Of the Aftershocks Versus The Mainshock mentioning

confidence: 69%

Coulomb static stress changes before and after the 23 October 2011 Van, eastern Turkey, earthquake (MW= 7.1): implications for the earthquake hazard mitigation

Utkucu

Durmuş

Yalçın

et al. 2013

Nat. Hazards Earth Syst. Sci.

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“…GPS measurements reveal that the northern branch is more active than the other branches, with a fault slip rate of 22 ± 3 mm/yr) [33]. Sakarya and its vicinity, located between the Samanlı Mountains in the north and the Kocaeli peneplain, have been exposed to many earthquakes Ms ≥ 6.8 in both historical and instrumental periods due to this tectonic characteristic on the more active northern branch [34]. This activity can also be seen in the seismicity map of the last century (Figure 1).…”

Section: Geological and Tectonic Featuresmentioning

confidence: 98%

Site Characterization and Liquefaction Hazard Assessment for the Erenler Settlement Area (Sakarya Province, Turkey) Based on Integrated SPT-Vs Data

2023

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The focus of this study is to examine the soil properties and liquefaction potential of the Erenler center district in a critical tectonic zone that can produce large earthquakes, such as the North Anatolian Fault Zone (NAFZ). In this sense, 40 surface wave measurements and 52 geotechnical drillings were employed. Accordingly, the liquefaction potential index (LPI), liquefaction severity index (LSI), Ishihara boundary (IB) curve, and Ishihara-inspired index (LPIISH) liquefaction approaches from geotechnical and geophysical methods were used as integrated. All liquefaction analyses were examined for two scenarios, Mw: 7.4 1999 Izmit (amax: 0.41 g) and Mw: 7.0 1967 (amax: 0.28 g) Mudurnu. According to the analyses, almost all of the study area showed liquefaction risk in the Izmit scenario. In the Mudurnu scenario, liquefaction risk distribution decreased parallel to acceleration. The LPI, LPIISH, and IB liquefaction risk results for both scenarios support each other. On the other hand, it was determined that the probability of liquefaction was lower in the LSI evaluation. The spatial distribution of the liquefaction potential of the Vs-based and SPT-based LPI assessments had a similar pattern. These results show that the LPI approach, originally SPT-based, can also be calculated based on Vs. In addition, according to Vs30-based (average shear wave velocity at 30 m depth) soil classification criteria, low-velocity character E and D soil groups dominate the Quaternary alluvial basin. This indicates that deformation-induced failures may occur even in areas with a low probability of liquefaction in similar strong ground motions. In addition, the evaluation of liquefaction with many approaches in two different bases within the scope of the study constitutes a novelty for the study area and liquefaction analyses. While performing diversified liquefaction analyses and approaches will contribute to obtaining more reliable soil liquefaction results, more case studies are needed to elucidate these comparisons.

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“…Consequently, 644 people lost their lives, 1966 were injured, and 252 were saved from the wreck. Besides, thousands of houses were destroyed or were damaged irreparably, causing thousands of people to lose their homes (AFAD, 2020a; Utkucu et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Selection of Emergency Shelter Areas Using Multi-Criteria Decision-Making Techniques: An Assessment of the Case of Erciş-Van, Turkey

İlerisoy

Gökgöz

Soyluk

2022

Period. Polytech. Arch.

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Emergency shelter areas, which are important in terms of gathering the survivors in a safe place during and after a devastating disaster, should be properly evaluated and determined before the disaster occurs. This study, it is aimed to develop a model that will allow the evaluation of existing emergency shelter areas and guide the area determination processes for new regulations. In line with the purpose, emergency shelter areas in Erciş-Van, affected by many potential natural disasters such as the 7.1 earthquake in 2011 and the flood in 2021, were evaluated. The proposed solution approach for the problem of selecting emergency shelter area consists of three primary stages. In the first stage, problem hierarchy and the criteria in the selection and evaluation of the emergency shelter areas were determined. Three main criteria and ten sub-criteria were determined for the evaluation of emergency shelter areas with content analysis. Then, the criteria weights were calculated using the AHP method, which shows the importance of the relevant criteria. At the last stage, 12 alternative emergency meeting areas in Erciş are evaluated using the TOPSIS method and ranked according to their priorities. The Field Properties Criteria were determined to be a high-weighted criterion, and Kışla Shelter Area was determined as the best alternative. This study presents a guide model that will help governments to determine new emergency shelter areas within the scope of disaster management, with evaluations for emergency shelter areas, and determined criteria weights.

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23 Ekim 2011 Van (Doğu Anadolu) Depremi'nin (Mw=7.1) Sismotektonik Özellikleri

Cited by 9 publications

References 4 publications

Coulomb static stress changes before and after the 23 October 2011 Van, eastern Turkey, earthquake (<i>M</i><sub>W</sub>= 7.1): implications for the earthquake hazard mitigation

Coulomb static stress changes before and after the 23 October 2011 Van, eastern Turkey, earthquake (<i>M</i><sub>W</sub>= 7.1): implications for the earthquake hazard mitigation

Site Characterization and Liquefaction Hazard Assessment for the Erenler Settlement Area (Sakarya Province, Turkey) Based on Integrated SPT-Vs Data

Selection of Emergency Shelter Areas Using Multi-Criteria Decision-Making Techniques: An Assessment of the Case of Erciş-Van, Turkey

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23 Ekim 2011 Van (Doğu Anadolu) Depremi'nin (Mw=7.1) Sismotektonik Özellikleri

Cited by 9 publications

References 4 publications

Coulomb static stress changes before and after the 23 October 2011 Van, eastern Turkey, earthquake (&lt;i&gt;M&lt;/i&gt;&lt;sub&gt;W&lt;/sub&gt;= 7.1): implications for the earthquake hazard mitigation

Coulomb static stress changes before and after the 23 October 2011 Van, eastern Turkey, earthquake (&lt;i&gt;M&lt;/i&gt;&lt;sub&gt;W&lt;/sub&gt;= 7.1): implications for the earthquake hazard mitigation

Site Characterization and Liquefaction Hazard Assessment for the Erenler Settlement Area (Sakarya Province, Turkey) Based on Integrated SPT-Vs Data

Selection of Emergency Shelter Areas Using Multi-Criteria Decision-Making Techniques: An Assessment of the Case of Erciş-Van, Turkey

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Coulomb static stress changes before and after the 23 October 2011 Van, eastern Turkey, earthquake (<i>M</i><sub>W</sub>= 7.1): implications for the earthquake hazard mitigation

Coulomb static stress changes before and after the 23 October 2011 Van, eastern Turkey, earthquake (<i>M</i><sub>W</sub>= 7.1): implications for the earthquake hazard mitigation