October 23rd 2011, M7.2 Tabanli - VAN Earthquake
Latest update: 01.11.2011, 10:24
The information collected and compiled by the Istanbul Technical University, Institute of Earthquake Engineering and Disaster Management regarding the October 23rd, 2011 M7.2 Tabanli-Van, Turkey Earthquake can be found at this website.
Please revisit our webiste for updates.Institute of Earthquake Engineering and Disaster Management
Istanbul Technical University
Initial Damage Reconnaissance
The detailed discussion regarding the distribution of damage will be provided soon. A small set of representative photos are provided below.
Reconnaisance Team
| Prof. Dr. Ertaç ERGÜVEN (Inst. of Earthquake Engineering and Disaster Management, Director) Prof. Dr. Zekai CELEP Prof. Dr. Ayfer ERKEN Asst. Prof. Dr. Pınar ÖZDEMİR ÇAĞLAYAN Asst. Prof. Dr. Beyza TAŞKIN Asst. Prof. Dr. Ufuk YAZGAN Res. Asst. Dr. Atilla SEZEN Res. Asst. Dr. Reşat OYGUÇ Res. Asst. Ülgen MERT TUĞSAL |
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Acknowledgements
Our institute is thankful to Prof. Dr. Muhammed ŞAHİN (ITU Rector), Mr. Munir Karaloğlu (Major of Van), Ms. Behice SOLDUK (City and Regional Planner, M.Sc.), Mr. Gökhan ÇEBİ (AFAD, Div. of Planning and Mitigation)and Mr. Davut ŞAHİN (AFAD, Div. of Recovery).
Photos
Photos from October 26th, 2011
Photos from October 27th, 2011
| Photos October 28th, 2011 posted below |
Other sample photos
Epicenter and time
| Date, Time: | 23.10.2011, 13:41:21 |
| Town/Province: | Tabanli, Van (TURKEY) (Map) |
| Mw | Ml | Depth [km] | Coordinates | Institution | Link |
| 6.7 | 19.02 | 38.68 N 43.47 E | Disaster and Emergency Management Presidency (AFAD) | Sayfa | |
| 7.2 | 6.6 | 5 | 38.758 N 43.360 E | Kandilli Observatory (KOREI) | Sayfa |
| 7.1 | 16 | 38.691 N 43.497 E | U.S. Geological Survey (USGS) | Sayfa | |
| 7.2 | 10 | 38.86 N 43.48 E | European-Mediterranean Seismological Centre (EMSC) | Sayfa | |
| 7.1 | 15 | 38.67 N 43.58 E | Earthquake Information Service, Postdam (GEOFON) | Sayfa | |
| 7.3 | 10 | 38.86 N 43.48 E | Swiss Seismological Service (SED) | Sayfa |
Centroid moment solution by USGS suggests that the earthquake is related to a compressional trust fault system located to the North-East of Van, Turkey.
Figure 1. Epicentral distances. Click here for a larger map (Topographic map source: Google Maps)
Figure 2. Aftershock decay rate
Ground motion intensity
Figure 3. Preliminary spectra for the ground motions recorded at the Muradiye Meteorological Service (strong motion) station. These spectra are obtained after a simple linear baseline correction of the raw accleration records. Refined filtering methods will be utilized to correct these records soon. We thank to the Disaster and Emergency Management Presidency (AFAD) for providing these strong motion records.
Reported Damage
Latest update: 31/10/11, 17:30| Location | Life loss | Injured | Collapsed Buldings |
| Merkez, Van | 95 | 350 | 10 |
| Erciş, Van | 169 | 750 | 55 |
| Diğer | 337 | 3052 | 2197 |
| Toplam | 601 | 4152 | 2262 |
Source: AFAD, Anadolu Agency, nvtmsnbc
Figure 4. Topography based approximate Vs30 (m/s) estimates (Wald and Allen, 2009). Click here for a larger map. (Vs30 values are from the USGS Global Vs30 Map Server).
Major Historical Earthquakes (in the region)
| Year | Location | Magnitude | Life loss | Damaged Buildings |
| 1941 | Ercis, Van | Ms 5.9 | 192 | 600 |
| 1945 | Catak, Van | Ms 5.8 | - | - |
| 1972 | Center, Van | Ms 5.2 | - | - |
| 1976 | Caldiran - Muradiye, Van | Ms 7.5 | 3840 | 9232 |
| 1977 | Ercis, Van | Ms 5.2 | - | - |
Sources:
1) B.U. Kandilli Observatory and Earthquake Research Institute
2)
Disaster and Emergency Management Presidency (AFAD)
3) Gülkan et al. (1978)
Weather Condition Prediction for Van
| Prediction | ||
| Date | Temperature (°C) | Condition |
| November, 1st | -2 / 8 | Partly cloudy |
November, 2nd |
-1 / 9 | Partly cloudy |
| November, 3rd | -1 / 8 | Cloudy |
| November, 4th | -3 / 5 | Sleety |
| November, 5th | -4 / 6 | Sleety |
Source: Turkish State Meteorological Service
Our Students' Efforts
Some of our graduates and students actively participated in the search and rescue operations as well as aid coordination efforts. Cem Behar who is a graduate of our institute volunteered in the search and rescue operations together with Galip Kartoğlu who is currently enrolled in our disaster management program. In addition, Eda Ates who is enrolled in the same program volunteered in the aid coordination efforts. The report and the presentation prepared by their team (GEA) summarizes their efforts.
Acknowledgements
The help and support provided by the Istanbul Technical University Rectorate is greatly appreciated.
Contact
Please send your comments to Asst. Prof. Dr. Ufuk Yazgan (ufukyazgan@itu.edu.tr).
Links
Disaster and Emergency Management Presidency (AFAD)
Bogazici University, Kandilli Observatory and Earthquake Research Institute (KOERI)
U.S. Geological Survey (USGS) - PAGER Loss Estimates
Earthquake Engineering Research Institute (EERI)
Middle East Technical University, Earthquake Engineering Research Center (EERC)
European-Mediterranean Seismological Centre (EMSC)
GFZ German Research Centre for Geosciences (GEOFON)
Swiss Seosmological Service (SED)
References
- Allen, T. I. and Wald, D.J. (2009). "On the Use of High-Resolution Topographic Data as a Proxy for Seismic Site Conditions (VS30)", Bulletin of the Seismological Society of America, Vol. 99, No. 2A, pp. 935-943. (PDF)
- Gülkan, P., Gürpınar, A., Çelebi, M., Arpat, E., and Gencoğlu, S., (1978). "Engineering report on the Muradiye-Çaldıran, Turkey Earthquake of 24 November 1976", National Academy of Sciences, Washington D.C.(PDF)