Estimation of shallow S-wave velocity structure and site response characteristics by microtremor array measurements in Tekirdag region, NW Turkey

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dc.authoridOzel, Oguz/0000-0002-4825-5382
dc.authoridKaragoz, Ozlem/0000-0002-5275-2197
dc.contributor.authorKaragoz, Ozlem
dc.contributor.authorChimoto, Kosuke
dc.contributor.authorCitak, Seckin
dc.contributor.authorOzel, Oguz
dc.contributor.authorYamanaka, Hiroaki
dc.contributor.authorHatayama, Ken
dc.date.accessioned2025-01-27T20:58:08Z
dc.date.available2025-01-27T20:58:08Z
dc.date.issued2015
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractIn this study, we aimed to explore the S-wave velocity structure of shallow soils using microtremors in order to estimate site responses in Tekirdag and surrounding areas (NW Turkey). We collected microtremor array data at 44 sites in Tekirdag, Marmara Ereglisi, Corlu, and Muratli. The phase velocities of Rayleigh waves were estimated from the microtremor data using a Spatial Autocorrelation method. Then, we applied a hybrid genetic simulated annealing algorithm to obtain a 1D S-wave velocity structure at each site. Comparison between the horizontal-to-vertical ratio of microtremors and computed ellipticities of the fundamental mode Rayleigh waves showed good agreement with validation models. The depth of the engineering bedrock changed from 20 to 50 m in the Tekirdag city center and along the coastline with a velocity range of 700-930 m/s, and it ranged between 10 and 65 m in Marmara Ereglisi. The average S-wave velocity of the engineering bedrock was 780 m/s in the region. We obtained average S-wave velocities in the upper 30 m to compare site amplifications. Empirical relationships between the AVs30, the site amplifications, and also average topographic slopes were established for use in future site effects microzonation studies in the region.
dc.description.sponsorshipJapan Ministry of Education, Culture, Sport, Science, and Technology (MEXT); Science and Technology Research Partnership for Sustainable Development (SATREPS); Istanbul University (BAP Project) [44524]
dc.description.sponsorshipThe authors would like to express deep gratitude to the Japan Ministry of Education, Culture, Sport, Science, and Technology (MEXT) for financial support, Science and Technology Research Partnership for Sustainable Development (SATREPS) for support for one of the authors' PhD education at the Tokyo Institute of Technology. This study is part of the Earthquake and Tsunami Disaster Mitigation in the Marmara Region and Disaster Education in Turkey (MarDiM) project, is also supported by Istanbul University (BAP Project no: 44524). The authors also would like to thank Dr. Hussam Eldein Zaineh's help and contribution for this study. The author also would like to thank Assoc. Dr. Aysegul Askan (Middle East Technical University), MSc students Bengi Behiye Aksahin and Safa Arslan (Istanbul University), PhD student Fatma Nurten Sisman Dersan (Middle East Technical University), MSc Kaouro Kojima and MSc Tomohir Tsuchiya (Tokyo Institute of Technology) for their helps during the 2013-2014 field studies.
dc.identifier.doi10.1186/s40623-015-0320-1
dc.identifier.issn1880-5981
dc.identifier.scopus2-s2.0-84946545232
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1186/s40623-015-0320-1
dc.identifier.urihttps://hdl.handle.net/20.500.12428/26621
dc.identifier.volume67
dc.identifier.wosWOS:000364376400001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer Heidelberg
dc.relation.ispartofEarth Planets and Space
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectAVs30
dc.subjectMicrotremor array observation
dc.subjectPhase velocity
dc.subjectShear-wave velocity
dc.subjectSite amplification
dc.subjectSlope
dc.subjectTekirdag
dc.titleEstimation of shallow S-wave velocity structure and site response characteristics by microtremor array measurements in Tekirdag region, NW Turkey
dc.typeArticle

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