Crustal Velocity Structure of Turkey from Ambient Noise Tomography (original) (raw)

Abstract

In eastern Turkey, the ongoing convergence of the Arabian and African plates with Eurasia has resulted in the westward extrusion of the Anatolian plate. To better understand the current state and the tectonic history of this region, we image crust and uppermost mantle structure with ambient noise tomography. Our study area extends from longitudes of 32°-44°E. We use continuous data from two temporary seismic deployments, our 2006-2008 North Anatolian Fault Seismic Experiment and the 1999-2001 Eastern Turkey Seismic Experiment, as well as from additional seismic stations in the region. We compute daily cross-correlations of noise records between all station pairs and stack them over the entire time period for which they are available, as well as in seasonal subsets, to obtain interstation empirical Green's functions. After selecting interstation cross-correlations with high signal-to-noise ratios and measuring interstation phase velocities, we compute phase velocity maps at perio...

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