Spectral amplification from impulse response functions retrieved from ambient seismic noise: Adana Basin, Turkey
Year: 2026
Type: article
Abstract: This study investigates the feasibility of extracting physically meaningful seismic amplification from Impulse Response Functions (IRFs) derived from Ambient Seismic Noise (ASN) in the Adana Basin, a deep sedimentary basin in southern Turkey. IRFs are retrieved by cross-correlating long-term noise recordings using a single virtual-source configuration, and the amplitude characteristics of Rayleigh-wave–dominated signals are analysed in the 2–10 s period range, which is particularly sensitive to basin-scale structure. Frequency-domain IRF amplifications exhibit a more consistent and physically meaningful relationship with basin geometry and sediment thickness than time-domain amplifications. Stations overlying the thickest sedimentary sections exhibit systematically higher long-period amplification, in agreement with the known basin geometry. Relative comparisons with observed earthquake amplitudes, basin-specific Ground Motion Prediction Equation (GMPE) estimates, and regional Peak Ground Acceleration (PGA) patterns reveal a consistent spatial correspondence, indicating that IRF-derived spectral amplitudes effectively capture dominant basin-controlled amplification trends. These findings highlight the potential of frequency-domain IRF analysis as a complementary tool for basin investigation and long-period seismic hazard studies, particularly in regions with limited earthquake recordings.
Source: Journal of Seismology
Author: Taciser Bakırcı
Institution: Aksaray University
Language: English
Topic: Seismic Waves and Analysis
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,290
Award: G4153444686
OpenAlex ID: W7165149178