Investigation of fault-zone induced site effect in the İzmit basin, Turkey
| العنوان: | Investigation of fault-zone induced site effect in the İzmit basin, Turkey |
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| المؤلفون: | Karolin Firtana-Elcomert, Argun H. Kocaoğlu |
| المصدر: | Acta Geophysica. 69:2069-2083 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Ground motion, geography, Geophysics, Seismic hazard, geography.geographical_feature_category, Shear (geology), Wave propagation, North Anatolian Fault, Structural basin, Sedimentary basin, Structural geology, Seismology, Geology |
| الوصف: | The seismic hazard in the Izmit basin, located in Marmara region of western Turkey, is high due to the northern branch of the North Anatolian Fault (NAF) and the potential ground motion amplification that may be caused by local site conditions, sedimentary basin effect as well as fault zone (FZ) induced site effect resulting from the generation of guided waves. In this study, we elaborate the relevance of the FZ-induced site effect in the Izmit basin along a 16.5-km-long N-S profile across the basin and perpendicular to the NAF by time and frequency domain analysis of waveforms obtained from two-dimensional (2D) simulations of viscoelastic wave propagation for a double-couple source at 14 km depth using a reference (basin-only) model and three basin-with-fault models: shallow (6 km), intermediate (12 km) and deep (19 km) FZ models. Our results show that the FZ-induced site effect within and near the northern branch of NAF in the Izmit basin can be very prominent with amplifications of about 5–10 in the frequency range of 0.05–4 Hz and about 20 at frequencies above 2 Hz, respectively. We obtain the most dramatic results for the deep FZ model causing shear- and surface-wave amplifications of about 15 at frequencies higher than 2.5 Hz for the distances between 6 and 13 km. |
| تدمد: | 1895-7455 1895-6572 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::9177e3528d8c9ab8b07a573d15a1dcfbTest https://doi.org/10.1007/s11600-021-00673-8Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........9177e3528d8c9ab8b07a573d15a1dcfb |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18957455 18956572 |
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