Ambient Noise Tomography Around the Central North Anatolian Fault Turkey

Date

2008-12-15

Author

Warren, Linda M.
Beck, Susan L.
Biryol, C. Berk
Zandt, George
Özacar, Atilla Arda
Yang, Yingjie

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

258
views

0
downloads

In eastern Turkey, the ongoing convergence of the Arabian and African plates with Eurasia has resulted in the westward extrusion of the Anatolian plate. The North Anatolian Fault (NAF), which forms the northern margin of the Anatolian plate, appears to be a nascent continental transform plate boundary. To study the evolution of such a plate boundary, both at the surface and at depth, we deployed a network of 39 broadband seismometers around the central portion of the NAF from July 2006 through April 2008. We use continuous data from this network and regional stations to image crust and uppermost mantle structure with ambient noise tomography. We compute daily cross-correlations of noise records between all station pairs and stack them over the entire duration of the experiment, as well as in seasonal subsets, to obtain interstation Green's functions. After selecting station pairs with high signal-to-noise ratios and measuring interstation phase velocities, we compute phase velocity maps at periods ranging from 8--35 s. At periods sensitive to crustal structure (T < 20 s), the phase velocity maps highlight fault structures. The region immediately around the NAF has high velocities and the region to the south, between the NAF and the Ezinepazari Fault Zone, has low velocities. In contrast, at longer periods, which have maximum sensitivity in the uppermost mantle, the phase velocity maps show a different pattern: the maps are dominated by a northwest-to-southeast decrease in phase velocities. At all periods, the phase velocity maps are similar for winter and summer subsets of the data, indicating that seasonal variations in noise sources do not bias our results.

URI

http://abstractsearch.agu.org/meetings/2008/FM/sections/T/sessions/T21A/abstracts/T21A-1914.html
https://hdl.handle.net/11511/94692

Conference Name

American Geophysical Union (AGU) 2008 Fall Meeting

Collections

Department of Geological Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Crustal Velocity Structure of Turkey from Ambient Noise Tomography Warren, Linda M.; Beck, Susan L.; Biryol, C. Berk; Zandt, George; Özacar, Atilla Arda; Yang, Yingjie (2009-12-14) 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...
Crustal velocity structure of Central and Eastern Turkey from ambient noise tomography Warren, Linda M.; Beck, Susan L.; Biryol, C. Berk; Zandt, George; Özacar, Atilla Arda; Yang, Yingjie (Oxford University Press (OUP), 2013-09-01) 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 degrees to 44 degrees E. We use continuous data from two temporary seismic deployments, our 2006-2008 North Anatolian Fault Passive Seismic Experiment and th...
Seismic attenuation tomography of the Sn phase beneath the Turkish-Iranian Plateau and the Zagros mountain belt Kaviani, Ayoub; Sandvol, Eric; Ku, Wenfei; Beck, Susan L.; Türkelli, Niyazi; Özacar, Atilla Arda; Delph, Jonathan R. (2022-08-01) The Turkish-Iranian Plateau and the Zagros highlands are among the most prominent physiographic features in the Middle East and were formed as a result of continental collision between the Arabian and Eurasian plates. To better understand the nature of the lithospheric mantle and the origin of the observed seismic anomalies in this region, we investigated seismic attenuation of the uppermost mantle by detailed measurements of the quality factor of the Sn seismic phase (Sn Q). To that end, we collected a lar...
Earthquake Detection Near the Central Anatolian Fault Zone Using Continuous Data from the CD-CAT Experiment Russell, Joshua B.; Beck, Susan L.; Turkelli, Niyazi; Kalafat, Doğan; Özacar, Atilla Arda; Sandvol, Eric (2014-12-15) In central Turkey, the Anatolian plate is actively being pushed by Arabian plate convergence in the east and pulled by Hellenic arc retreat to the west; however, there is also ample evidence of internal plate deformation. This region provides an opportunity to gain a deeper understanding of the transition from collisional (eastern Anatolia) to escape tectonics (western Anatolia). The Continental Dynamics: Central Anatolian Tectonics (CD-CAT) experiment, consists of a dense array of 71 broadband seismometers...
Evolution of an early Eocene pull-apart basin in the Central Pontides (Northern Turkey): New insights into the origin of the North Anatolian Shear Zone Ottria, Giuseppe; Pandolfi, Luca; Catanzariti, Rita; Da Prato, Simone; Ellero, Alessandro; Frassi, Chiara; Göncüoğlu, Mehmet Cemal; Marroni, Michele; Ruffini, Leonardo; Sayıt, Kaan (2017-12-01) Although the North Anatolian Shear Zone is one of the main lithospheric-scale strike-slip deformation zone in the world, playing a prominent role in the complex geodynamic interaction among the Eurasian, Anatolian and Arabian plates, the onset time of its activity remains highly controversial. Here, we tackle this issue by utilizing nannofossil biostratigraphy on deposits from the Tacilar basin, a pull-apart basin that we have identified inside the North Anatolian Shear Zone overprinting the Intra-Pontide s...

Citation Formats

L. M. Warren, S. L. Beck, C. B. Biryol, G. Zandt, A. A. Özacar, and Y. Yang, “Ambient Noise Tomography Around the Central North Anatolian Fault Turkey,” San-Francisco, Kostarika, 2008, vol. 89, Accessed: 00, 2021. [Online]. Available: http://abstractsearch.agu.org/meetings/2008/FM/sections/T/sessions/T21A/abstracts/T21A-1914.html.