Seismogenesis and earthquake triggering during the Van (Turkey) 2011 seismic sequence

Bayrak, Yusuf; Yadav, R. B. S.; Kalafat, Doğan; Tsapanos, Theodoros M.; Çınar, Hakan; Singh, A. P.; Bayrak, Erdem; Yılmaz, Şeyda; Öcal, Feyza; Koravos, G. Ch.

doi:10.1016/j.tecto.2013.05.008

Cited by 40 publications

(33 citation statements)

References 55 publications

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“…The number of aftershocks with M = 4.0-4.9 reached up to 114, the biggest number of aftershocks ever recorded after any major earthquake in Turkey ( Fig. 1) (Bayrak et al 2013). Significant aftershock has been associated with this earthquake.…”

Section: Introductionmentioning

confidence: 92%

“…It was associated with a reverse faulting mechanism dipping toward north (Erdik et al 2012;Atzori et al 2011;METU/EERC 2011;EERI 2012), caused significant damage in the cities of Van, Ercis¸as well as in many villages, caused deaths of nearly 600 people, and injured 2,000, and about 15,000 buildings were damaged in the region (Bayrak et al 2013;Taskin et al 2013). About 58 buildings are reported to have totally collapsed, 52 of them are located in Ercis, while 6 of them are located in Van.…”

Section: Introductionmentioning

confidence: 99%

“…Many reconnaissance reports and papers have been published after the earthquake, but none of them specifically investigated the damage to industrial facilities, especially to silos (Bayrak et al 2013;Ozden et al 2011;Taskin et al 2013;Onen et al 2012;Guney 2012). This paper aims at investigating the damage at silos which collapsed during the main shock.…”

Section: Introductionmentioning

confidence: 99%

“…2). The earthquake is reported to have occurred on a blind oblique trust fault, namely Van fault, oriented toward the NE-SW direction (Erdik et al 2012;KOERI 2011;Bayrak et al 2013) and is not marked on the active fault map of Turkey (Emre et al 2012). …”

Section: Introductionmentioning

confidence: 99%

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Seismic performance of elevated steel silos during Van earthquake, October 23, 2011

et al. 2014

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Silos are commonly used industrial structures to store dry/granular materials like cement or wheat. A typical silo consists of a vertical steel tank supported by a braced steel frame which rests on concrete support. Due to unloading purposes, the tank is generally located at an elevated position. This makes the structure vulnerable to axial loads in columns due to excessive overturning moments generated at the base of the structure. During the October 23, 2011 Van earthquake in Turkey, many silos collapsed either due to column buckling or foundation problems. In this paper, the field observations regarding the seismic performance of silos after the Van earthquake are first summarized. Then, the seismic performances of two steel-elevated silos located in the earthquake region are studied. One of the silos survived the earthquake by some minor damages in the form of buckling (at bottom horizontal brace) and spalling of concrete support, while the other silo remained undamaged. Nonlinear dynamic time history analyses are performed to evaluate the seismic performances of both silos. As the input ground motion, the recorded ground motion from a temporary aftershock station (about 2 km away from the silos) in the second earthquake is used. Analyses indicate that design and construction quality of elevated silos determine the seismic performance. Finally, recommendations are given to improve the seismic performance of new constructions.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seismic performance of elevated steel silos during Van earthquake, October 23, 2011

et al. 2014

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“…The b value of an earthquake is typically high (above 1.0), if it is caused due to a heterogeneous and fractured rock matrix and commonly associated with the flow of fluids or other viscous materials into the rock matrix. The low b values of earthquakes are related to the release of energy in highly stressed zones [14].The b value has been found to decrease if the sample size of the events increases. It has been found to be lowered by 0.1 for events larger than 200 [15].The prediction of aftershocks was commonly done by the power law, Omori's Law which states that the chances of aftershocks decrease with increasing time.…”

Section: Introductionmentioning

confidence: 97%

Potential of Fractal Analysis of Earthquakes through Wavelet Analysis and Determination ofbValue as an Aftershock Precursor: A Case Study Using Earthquake Data between 2003 and 2011 in Turkey

Srivardhan

Srinu

2014

Journal of Earthquakes

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The b value of earthquakes is very useful to forecast the occurrence of aftershocks in a given region. The b value characterizes the release of energy due to stress accumulation in the rocks through an earthquake and is a direct indicator for the prediction of aftershocks in the region. Wavelet based fractal analysis is used in this study to determine the b value by calculating the fractal dimension. This method guarantees high accuracy results through a limited dataset. The objective of this work was to demonstrate an elegant method for the determination of the b value after an earthquake and predict the occurrence of aftershocks with high accuracy. Repeated earthquakes were analyzed between 2003 and 2011 in Turkey and the b value was found for these earthquakes. The results gave an indication that the b value of the mainshock and its aftershocks are different and aftershocks occur in the region when the b value of the mainshock deviates significantly from 0.5, and aftershocks keep occurring until the b value of the earthquake approaches close to 0.5 for this region.

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Long-Term Seismicity Behavior of the Zagros Region in Iran

Madahizadeh

Mostafazadeh

Ansari

2016

Pure Appl. Geophys.

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Seismogenesis and earthquake triggering during the Van (Turkey) 2011 seismic sequence

Cited by 40 publications

References 55 publications

Seismic performance of elevated steel silos during Van earthquake, October 23, 2011

Seismic performance of elevated steel silos during Van earthquake, October 23, 2011

Potential of Fractal Analysis of Earthquakes through Wavelet Analysis and Determination ofbValue as an Aftershock Precursor: A Case Study Using Earthquake Data between 2003 and 2011 in Turkey

Long-Term Seismicity Behavior of the Zagros Region in Iran

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