Regional Variation of Coda Q in Major Fault Zones of Anatolia and Its Implications
Applied Sciences (Switzerland), vol.16, no.13, 2026 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 16 Issue: 13
- Publication Date: 2026
- Doi Number: 10.3390/app16136728
- Journal Name: Applied Sciences (Switzerland)
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Compendex, INSPEC, Directory of Open Access Journals
- Keywords: coda wave, wave propagation, frequency dependence, seismic attenuation, lateral crustal heterogeneity
- Ataturk University Affiliated: Yes
Abstract
This study utilizes coda wave analysis—focusing on scattering and attenuation mechanisms—to map the complex tectonic framework and active faulting characteristics of the East and Southeast Anatolia regions based on the single back-scattering model. For this research area, Q0 values range from 83 to 101, and η ranges from 0.86 to 0.98 in the frequency range from 1.5 to 20 Hz. The relationship calculated in this study, Qc = (91∓5)f 0.96 ∓ 0.04, demonstrates that attenuation is highly frequency-dependent. A comparative analysis across eight sub-regions demonstrates that large, high-density fault zones are characterized by low Qc and high η values. The frequency dependency (η) and coda (QC) values obtained in this study show changes that confirm the presence of three different seismotectonic regimes known to be in the north of the NAFZ, south of the EAFZ, and between the NAFZ and EAFZ. In this study, the relationship between the tectonic activity, lateral tectonic discontinuities, rating of faulting, and the coda waves and its frequency dependence manifested itself very effectively.