Fault Process and Broadband Ground-Motion Simulations of the 23 October 2011 Van (Eastern Turkey) Earthquake

Download
index.pdf
2013-12-01
Gallovic, F.
Ameri, G.
Zahradnik, J.
Jansky, J.
Plicka, V.
Sokos, E.
Askan Gündoğan, Ayşegül
Pakzad, M.
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
185
views
0
downloads
On 23 October 2011 an M-w 7.1 earthquake occurred in eastern Turkey, close to the towns of Van and Ercis, causing more than 600 casualties and widespread structural damage. The earthquake ruptured a 60-70 km long northeast-southwest fault with a thrust mechanism, in agreement with regional tectonic stress regime. We studied the fault process of the event and the recorded ground motions using different sets of data. Regional records (0.005-0.010 Hz) are used to constrain the centroid moment tensor solution. Near-regional data, 100-200 km from the fault, are used for relocation of the hypocenter and, in the frequency range 0.05-0.15 Hz, for inversion of the rupture propagation by two methods: multiple point-source model (ISOLA) and multiple finite-extent (MuFEx) source model. MuFEx also provides an estimate of the model uncertainty, which is quite large due to unfavorable station distribution. We arrive at several plausible scenarios (equally well fitting the observed data including Global Positioning System coseismic displacements) with different styles of the rupture propagation. A few alternative source models are used for broadband (0.1-10 Hz) ground-motion simulations by means of the hybrid integral-composite source model. Only models comprising source complexities, such as a delayed rupture of shallow asperities, enable explanation of the acceleration record at the only available near-fault station, which exhibits a long duration and two prominent wave groups. These complex rupture models are used to simulate the ground motion in the near-fault area, specifically, at Van and Ercis, where records of the mainshock were missing, providing reasonable agreement with the observed spatial distribution of damage.
Source inversion, Rupture, Uncertainty, Model, Prediction, Parameters, Isola, Waves, Field
https://hdl.handle.net/11511/37643
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
Department of Civil Engineering, Article

Suggestions

Comparison of machine learning tools for damage classification: the case of L’Aquila 2009 earthquake
Di Michele, F.; Stagnini, E.; Pera, D.; Rubino, B.; Aloisio, R.; Askan Gündoğan, Ayşegül; Marcati, P. (2023-1-01)
On April 6, 2009, a strong earthquake (6.1 Mw) struck the city of L’Aquila, which was severely damaged as well as many neighboring towns. After this event, a digital model of the region affected by the earthquake was built and a large amount of data was collected and made available. This allowed us to obtain a very detailed dataset that accurately describes a typical historic city in central Italy. Building on this work, we propose a study that employs machine learning (ML) tools to predict damage to buildi...
Civil society and the state: Turkey after the earthquake
Jalali, R (2002-06-01)
On 17 August 1999 Turkey was hit by a massive earthquake. Over 17,000 lives were lost and there was extensive damage to Turkey's heartland This paper examines how various public and private institutions, including state and civil society institutions such as NGOs and the media responded to the needs of earthquake survivors. It documents the extensive involvement of NGOs in the relief efforts immediately after the disaster and examines the impact of such participation on state-civil society relations in the ...
Rainfall triggered landslides in unsaturated soils a numerical sensitivity analysis for rainfall threshold
Ahmadiadli, Mohammad; Huvaj Sarıhan, Nejan; Toker, Nabi Kartal (2012-04-27)
Catastrophic precipitation-induced landslides have frequently hit villages, towns and roads in Black Sea Region in northern Turkey, causing extensive damage and many fatalities. Due to global climatic changes, the intensity and frequency of extreme rainfall events are expected to increase. In addition, due to limited available land on level ground, urbanization continue to increase on sloping ground which increases the exposure and elements at risk. Most available methods for predicting rainfall-induced slo...
Undrained cyclic shear and deformation behavior of silt-clay mixtures of Adapazan, Turkey
Yilmaz, MT; Pekcan, Onur; Bakir, BS (2004-09-01)
The city of Adapazari, which is mostly located on a deep alluvial basin in the near field of the ruptured fault, experienced substantial damage during the 17 August 1999 Kocaeli (Izmit), Turkey earthquake (M-w 7.4). Besides over 2800 collapsed and heavily damaged buildings in the city, numerous cases of displacements of various forms and levels occurred at the building foundations. The undrained shear and deformation behavior of silt-clay mixtures encountered at the sites with significant foundation displac...
Strong-Ground-Motion Simulation of the 6 April 2009 L'Aquila, Italy, Earthquake
Ugurhan, Beliz; Askan Gündoğan, Ayşegül; Akinci, Aybige; Malagnini, Luca (2012-08-01)
On 6 April 2009, an earthquake of M-w 6.13 (Herrmann et al., 2011) occurred in central Italy, close to the town of L'Aquila. Although the earthquake is considered to be a moderate-size event, it caused extensive damage to the surrounding area. The earthquake is identified with significant directivity effects: high-amplitude, short-duration motions are observed at the stations that are oriented along the rupture direction, whereas low-amplitude, long-duration motions are observed at the stations oriented in ...
Citation Formats
F. Gallovic et al., “Fault Process and Broadband Ground-Motion Simulations of the 23 October 2011 Van (Eastern Turkey) Earthquake,” BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA, pp. 3164–3178, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37643.
METU IIS - Integrated Information Service open@metu.edu.tr