Published

2017-07-01

Analysis of October 23 (Mw 7.2) and November 9 (Mw 5.6), 2011 Van Earthquakes Using Long-Term GNSS Time Series

Análisis de los terremotos de octubre 23 (7.2 Mw) y noviembre 9 (5.6 Mw) de 2011 en Van a través de series temporales GNSS a largo plazo

Authors

  • Ibrahim Tiryakioglu
  • Hakan Yavasoglu
  • Mehmet Ali Ugur Ugur
  • Caglar Ozkaymak
  • Mustafa Yilmaz
  • Hasan Kocaoglu
  • Bayram Turgut

The eastern Anatolia provides one of the best examples of an area of rapid deformation and intense contraction that is the consequence of an active continental collision between the Arabian and Eurasian plates leading to large and devastating earthquakes. The latest evidence of the active tectonism in the region is revealed by two remarkable seismic events; Van-Tabanli (Mw 7.2, October 23, 2011) and Van-Edremit (Mw 5.6, November 9, 2011) earthquakes. The study of the earthquake cycle and observation of geodetic and seismic deformation in this region is very important to hazard assessments. In this study, the inter-seismic, co-seismic, and post-seismic movements caused by the above-mentioned earthquakes were investigated using the time series of 2300 days of Global Navigation Satellite Systems (GNSS) observations of the local stations selected from the network of the Continuously Operating Reference Stations, Turkey (CORS-TR). For the inter-seismic period, approximately 1100 daily data were obtained from 21 CORS-TR stations (prior to the earthquakes between October 1, 2008 and October 23, 2011) and evaluated using the GAMIT/GLOBK software. The behaviour of these stations was investigated by processing 1 Hz data from the GNSS stations during the earthquakes on the GAMIT/TRACK software. In addition to October 23 and November 9, the GNSS data on one day before and after the earthquakes was assessed to determine co-seismic deformations. During the October 23 earthquake, hanging-wall deformation of about 60 mm was detected in the SW direction at the MURA station. However, at the VAAN station, deformation of 200 mm (value predicted by time series) was observed in the footwall block in the NW direction. There were not any significant changes at the stations during the November 9 earthquake. For the post-seismic period, the GNSS data from 2012 to 2015 was evaluated. According to the observations, post-seismic deformation continued at the stations close to the epicenter of the earthquake.

Anatolia oriental provee uno de los mejores ejemplos de un área de rápida deformación e intensa contracción, consecuencia de una colisión continental activa entre la placa Arábiga y la Euroasiática, lo que causa grandes y devastadores terremotos. Dos notables terremotos son evidencia de la actividad tectónica de la región: los terremotos Van-Tabanli (7.2 Mw. 23 de octubre de 2011) y Van-Edremit (5.6 Mw, 9 de noviembre de 2011). El estudio del ciclo sísmico y la observación de las deformaciones geodésicas y sísmicas en esta región es fundamental para la evaluación de riesgo. En este estudio, se investiga las fases inter-, co- y post-sísmicas asociados a estos terremotos a través de 2300 días de observaciones del Sistema Global de Navegación por Satélite (GNSS, por sus siglas en inglés) de estaciones locales seleccionadas de la red de Estaciones de Referencia de Funcionamiento Continuo en Turquía (CORS-TR). Para el periodo intersísmico se obtuvieron aproximadamente 1100 datos diarios de 21 estaciones CORS-TR (anteriores a los terremotos entre el 1 de octubre de 2008 y el 23 de octubre de 2011) y evaluados con el software GAMIT/GBLOK. El comportamiento co-sísmico fue investigado procesando datos de 1 Hz de las estaciones GNSS durante los terremotos en el software GAMIT/TRACK. Adicionalmente se evaluaron datos del GNSS un día antes y un día después de los terremotos para determinar las deformaciones cosísmicas. Durante el terremoto del 23 de octubre, en el bloque colgante se detectó una deformación de 60 mm en dirección SW (estación MURA). En la estación VAAN en el bloque yacente se observó una deformación de 200 mm en dirección NW (valor predicho por series temporales). Durtante el terremoto del 9 de Noviembre no se observó cambios significativos. Para la fase post-sísmica se evaluaron los datos de la GNSS del 2012 al 2015. Según las observaciones, la deformación postsísmica continuó en las estaciones cercanas al epicentro del terremoto.

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How to Cite

APA

Tiryakioglu, I., Yavasoglu, H., Ugur, M. A. U., Ozkaymak, C., Yilmaz, M., Kocaoglu, H. and Turgut, B. (2017). Analysis of October 23 (Mw 7.2) and November 9 (Mw 5.6), 2011 Van Earthquakes Using Long-Term GNSS Time Series. Earth Sciences Research Journal, 21(3), 147–156. https://doi.org/10.15446/esrj.v21n3.62812

ACM

[1]
Tiryakioglu, I., Yavasoglu, H., Ugur, M.A.U., Ozkaymak, C., Yilmaz, M., Kocaoglu, H. and Turgut, B. 2017. Analysis of October 23 (Mw 7.2) and November 9 (Mw 5.6), 2011 Van Earthquakes Using Long-Term GNSS Time Series. Earth Sciences Research Journal. 21, 3 (Jul. 2017), 147–156. DOI:https://doi.org/10.15446/esrj.v21n3.62812.

ACS

(1)
Tiryakioglu, I.; Yavasoglu, H.; Ugur, M. A. U.; Ozkaymak, C.; Yilmaz, M.; Kocaoglu, H.; Turgut, B. Analysis of October 23 (Mw 7.2) and November 9 (Mw 5.6), 2011 Van Earthquakes Using Long-Term GNSS Time Series. Earth sci. res. j. 2017, 21, 147-156.

ABNT

TIRYAKIOGLU, I.; YAVASOGLU, H.; UGUR, M. A. U.; OZKAYMAK, C.; YILMAZ, M.; KOCAOGLU, H.; TURGUT, B. Analysis of October 23 (Mw 7.2) and November 9 (Mw 5.6), 2011 Van Earthquakes Using Long-Term GNSS Time Series. Earth Sciences Research Journal, [S. l.], v. 21, n. 3, p. 147–156, 2017. DOI: 10.15446/esrj.v21n3.62812. Disponível em: https://revistas.unal.edu.co/index.php/esrj/article/view/62812. Acesso em: 28 mar. 2024.

Chicago

Tiryakioglu, Ibrahim, Hakan Yavasoglu, Mehmet Ali Ugur Ugur, Caglar Ozkaymak, Mustafa Yilmaz, Hasan Kocaoglu, and Bayram Turgut. 2017. “Analysis of October 23 (Mw 7.2) and November 9 (Mw 5.6), 2011 Van Earthquakes Using Long-Term GNSS Time Series”. Earth Sciences Research Journal 21 (3):147-56. https://doi.org/10.15446/esrj.v21n3.62812.

Harvard

Tiryakioglu, I., Yavasoglu, H., Ugur, M. A. U., Ozkaymak, C., Yilmaz, M., Kocaoglu, H. and Turgut, B. (2017) “Analysis of October 23 (Mw 7.2) and November 9 (Mw 5.6), 2011 Van Earthquakes Using Long-Term GNSS Time Series”, Earth Sciences Research Journal, 21(3), pp. 147–156. doi: 10.15446/esrj.v21n3.62812.

IEEE

[1]
I. Tiryakioglu, “Analysis of October 23 (Mw 7.2) and November 9 (Mw 5.6), 2011 Van Earthquakes Using Long-Term GNSS Time Series”, Earth sci. res. j., vol. 21, no. 3, pp. 147–156, Jul. 2017.

MLA

Tiryakioglu, I., H. Yavasoglu, M. A. U. Ugur, C. Ozkaymak, M. Yilmaz, H. Kocaoglu, and B. Turgut. “Analysis of October 23 (Mw 7.2) and November 9 (Mw 5.6), 2011 Van Earthquakes Using Long-Term GNSS Time Series”. Earth Sciences Research Journal, vol. 21, no. 3, July 2017, pp. 147-56, doi:10.15446/esrj.v21n3.62812.

Turabian

Tiryakioglu, Ibrahim, Hakan Yavasoglu, Mehmet Ali Ugur Ugur, Caglar Ozkaymak, Mustafa Yilmaz, Hasan Kocaoglu, and Bayram Turgut. “Analysis of October 23 (Mw 7.2) and November 9 (Mw 5.6), 2011 Van Earthquakes Using Long-Term GNSS Time Series”. Earth Sciences Research Journal 21, no. 3 (July 1, 2017): 147–156. Accessed March 28, 2024. https://revistas.unal.edu.co/index.php/esrj/article/view/62812.

Vancouver

1.
Tiryakioglu I, Yavasoglu H, Ugur MAU, Ozkaymak C, Yilmaz M, Kocaoglu H, Turgut B. Analysis of October 23 (Mw 7.2) and November 9 (Mw 5.6), 2011 Van Earthquakes Using Long-Term GNSS Time Series. Earth sci. res. j. [Internet]. 2017 Jul. 1 [cited 2024 Mar. 28];21(3):147-56. Available from: https://revistas.unal.edu.co/index.php/esrj/article/view/62812

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