Investigation of fault zone induced site effect in the İzmit basin, Turkey

Firtana-Elcomert, Karolin; Kocaoğlu, Argun

doi:10.1007/s11600-021-00673-8

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Tytuł artykułu

Investigation of fault zone induced site effect in the İzmit basin, Turkey

Autorzy

Firtana-Elcomert Karolin , Kocaoğlu Argun

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-021-00673-8

Warianty tytułu

Języki publikacji

Abstrakty

The seismic hazard in the İzmit 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 İzmit 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 İzmit basin can be very prominent with amplification 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 amplification of about 15 at frequencies higher than 2.5 Hz for the distances between 6 and 13 km.

Słowa kluczowe

site amplification seismic wave propagation simulation finite difference method İzmit basin fault-zone induced waves

widma przesunięcia symulacja propagacji fali sejsmicznej metoda różnic skończonych

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2021

Tom

Vol. 69, no. 6

Strony

2069--2083

Opis fizyczny

Bibliogr. 35 poz.

Twórcy

autor

Firtana-Elcomert Karolin

firtana@itu.edu.tr

Department of Geophysical Engineering, Faculty of Mines, İstanbul Technical University, 34469 Maslak, İstanbul, Turkey

https://orcid.org/0000-0002-8006-2142

autor

Kocaoğlu Argun

argun.kocaoglu@itu.edu.tr

Department of Geophysical Engineering, Faculty of Mines, İstanbul Technical University, 34469 Maslak, İstanbul, Turkey

https://orcid.org/0000-0002-7948-2625

Bibliografia

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Bibliografia

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