Investigation of Soil Amplification in North Cyprus

Document Type : Research Article


Assistant Professor, Earthquake Research Centre, Ataturk University, Erzurum, Turkey


In this study, soil characteristics were investigated using four well-located earthquakes recorded by six accelerometers located in North Cyprus. The amplification values obtained according to the soil features were mapped in accordance with different frequencies using horizontal to vertical spectral ratio method. The dominant period values of the units below the station locations were calculated in order to prevent the resonance effect of structures under dynamic loads. In general, high amplifications were observed in the low-frequency range in the loose units, while low amplifications were calculated in the compact units. High amplification values were detected at low frequencies in accelerometer stations located above the Quaternary alluvium and gypsum marls in Nicosia. Since the soil dominant period varies from 0.1 s to 0.3 s, structuring between 1 and 3 floors should be avoided in this area. The dominant period values for Erenkoy and Famagusta are 1.1 and 0.6; therefore, structuring between 11 and 6 floors should be refrained, respectively.


Main Subjects

AFAD, 2018, Republic of Turkey Prime Ministry Disaster and Emergency Management Authority Presidential of Earthquake Department, https://deprem., (last accessed July 2018).
Ambraseys, N. N. and Finkel, C. F., 1987, Seismicity of Turkey and neighboring regions 1899-1915. Annales Geophysicale, 5B, 701-726.
Ambraseys, N. N., 1988, Engineering Seismology: Part I. Earthquake Engineering and Structural Dynamics, 17, 1-105.
Ambraseys, N. N., 1988, Engineering seismology: Part II. Earthquake Engineering and Structural Dynamics, 17(1).
Ambraseys, N. N. and Jackson, J. A., 1998, Faulting Associated with Historical and Recent Earthquakes in the Eastern Mediterranean Region. Geophysical Journal International, 133, 390-406.
Ambraseys, N. N. and Finkel, C., 1995, The Seismicity of Turkey and adjacent areas. A Historical Review, 1500-1800. Earthquake Engineering and Structural Dynamics, 25(6), 645.
Ateş, A., 2016, 1999 Investigations of Soil Structure Resonance Overlapping and Structural Hazard Relations in Duzce City due to 1999 Duzce Earthquake. Duzce Universitesi Bilim ve Teknoloji Dergisi, 4, 911-925.
Aziz, A., 1942, Luminous phenomena accompanying the Cyprus earthquake, January 20, 1941. Nature, 149, 640.
CGHET, 2018, Cyprus Geological Heritage Educational Tool,, (last accessed July 2018).
Demirtas, R., 2018, Helenik-Kıbrıs Yay Sistemi Diri Fayları, Paleosismolojik Çalışmalar ve Gelecek Deprem Potansiyelleri,, (last accessed July 2018).
Dewey, J. F., Hempton, M. R., Kidd, W.S.F., Saroglu, F. and Sengor, A.M.C., 1986, Shortening of continental lithoshpere: The neo-tectonics of eastern Anatolia-a young collision zone, in Coward, M.P., Reis, A. C. (Eds.). Collision Tectonics, Geological Society, London,  3-36.
Galanopoulos, G. A. and Delibasis, N., 1965, The seismic Activity in Cyprus Area, Notes of the Academy of Athens, Athens.
Gok, E., Kececioglu, M., Ceken, U. and Polat, O., 2012, IzmirNET Istasyonlarinda Standart Spektral Oran Yontemi Kullanilarak Zemin Transfer Fonksiyonlarinin Hesaplanmasi. DEU Muhendislik Bilimleri Dergisi, 14(41), 1-11.
Hays, W. W., 1986, Site amplification of earthquake ground motion. Proceedings of the Third U.S. National Conference on Earthquake Engineering, 1, 357-368.
Hill, G., 1948, A History of Cyprus, vol. 2: The Frankish Period, 1192-1432, Cambridge.
Kadirioglu, F. T., Kartal, R. F., Kilic, T., Kalafat, D., Duman, T. Y., Ozalp, S. and Emre, O., 2014, An Improved Earthquake Catalogue (M 4.0) For Turkey And Near Surrounding (1900-2012). 2nd European Conference on Earthquake Engineering and Seismology, 25-29 Aug., 411-422.
Konno, K. and Ohmachi, T., 1998, Ground-motion Characteristics Estimated from Spectral Ratio between Horizontal and Vertical Components of Microtremor. Bulletin of the Seismological Society of America, 88(1), 228-241.
Le Pichon, X., Chamot-Rooke, N. and Lallemant, S., 1995, Geodetic determination of the kinematics of central Greece with respect to Europe: Implications for eastern Mediterranean tectonics. Journal of Geophysical Research, 100, 12675-12690.
Lermo J. and Chavez G. F. J., 1993, Site Effect Evaluation Using Spectral Ratios with Only One Station. Bulletin of the Seismological Society of America, 83, 1574-1594.
McClusky, S., Balassanian, S., Barka, A., Demir, C., Ergintav, S., Georgiev, I., Gurkan, O., Hamburger, M., Hurst, K. and Kahle, H., 2000, Global Positioning System constraints on plate kinematics and dynamics in the eastern Mediterranean and Caucasus. Journal of Geophysical Research, 105, 5695-5719.
McKenzie, D., 1972, Active tectonics of the Mediterranean Region. Geophysical Journal International, 30, 109-185.
McKenzie, D., 1976, The east Anatolian fault: a major structure in eastern Turkey. Earth and Planetary Science Letters, 29, 189-193.
MOA, 2018, Geological Survey Department of Cyprus,, (last accessed July 2018).
Mor, A. and Citci, M. D., 2007, KKTC’de kentleşme, Dogu Cografya Dergisi, 12(18), 225-245.
Nakamura, Y., 1989, A Method for Dynamic Characteristics Estimation of Subsurface using Microtremor on the Ground Surface. Quarterly Report of Railway Technology Research Institute, 30, 25-33.
Ozer, C. and Polat, O., 2017a, Determination of 1-D (One-Dimensional) seismic velocity structure of Izmir and surroundings. DEU Journal of Science and Engineering, 19, 147-168.
Ozer, C. and Polat, O., 2017b, Local earthquake tomography of Izmir geothermal area, Aegean region of Turkey. Bollettino di Geofisica Teorica ed Applicata, 58(1), 17-42.
Ozer, C. and Polat, O., 2017c, 3-D crustal velocity structure of Izmir and surroundings. Journal of the Faculty of Engineering and Architecture of Gazi University, 32(3), 733-747.
Ozer, C., Gok, E. and Polat, O., 2018, Three-Dimensional Seismic Velocity Structure of the Aegean Region of Turkey from Local Earthquake Tomography. Annals of Geophysics, 61(1), 1-21.
Pamuk, E., Ozdag, O. C. and Akgun, M., 2018, Soil characterization of Bornova Plain (Izmir, Turkey) and its surroundings using a combined survey of MASW and ReMi methods and Nakamura’s (HVSR) technique. Bulletin of Engineering Geology and the Environment, 1-13.
Pamuk, E., Ozdag, O. C., Tuncel, A., Ozyalin, S. and Akgun, M., 2018, Local site effects evaluation for Aliaga/Izmir using HVSR (Nakamura technique) and MASW methods. Natural Hazards, 90(2), 887-899.
Pamuk, E., Gonenc, T., Ozdag, O. C. and Akgun, M., 2018, 3D Bedrock Structure of Bornova Plain and Its Surroundings (İzmir/Western Turkey). Pure and Applied Geophysics, 175(1), 325-340.
Pamuk, E., Ozdag, O. C., Ozyalin, S. and Akgun, M., 2017, Soil characterization of Tinaztepe region (Izmir/Turkey) using surface wave methods and Nakamura (HVSR) technique. Earthquake Engineering and Engineering Vibration, 16(2), 447-458.
Pamuk, E., Akgun, M., Ozdag, O. C. and Gonenc, T., 2017, 2-D soil and engineering-seismic bedrock modeling of eastern part of Izmir inner bay/Turkey. Journal of Applied Geophysics, 137, 104-117.
Pantazis, T. M., 1969, A revised bibliography of Cyprus geology. Bulletin of the Geological Survey Department of Cyprus, 2, 57-81.
Papadimitriou, E. E. and Karakostas, V. G., 2006, Earthquake generation in Cyprus revealed by the evolving stress field. Tectonophysics, 423, 61-72.
Rodriguez, M. A., Bray, J. D. and Abrahamson, N. A., 2001, An Empirical Geotechnical Seismic Site Response Procedure. Earthquake Spectra, 17(1), 65-87.
Sesame, 2004, Guidelines for the Implementation of the H/V Spectral Ratio Technique on Ambient Vibrations: Measurements, Processing and Interpretation,
Tan, O., Tapırdamaz, M. C. and Yoruk, A., 2008, The Earthquake Catalogues for Turkey. Turkish Journal of Earth Sciences, 17, 405-418.
Yalcinkaya, E. and Alptekin, O., 2003, Dinar’da Zemin Buyutmesi ve 1 Ekim 1995 Depreminde Gozlenen Hasarla Iliskisi, Yerbilimleri, 27, 1-13.
Yalcinkaya, E., 2005, BYNET (Bursa-Yalova-Turkiye Ivme Olçer Agi) Istasyonlarinda Yerel Zemin Etkilerinin Incelenmesi. DEU Muhendislik Bilimleri Dergisi, 7(2), 75-85.
Yalcinkaya, E. and Alptekin, O., 2005, Site Effect and Its Relationship to the Intensity and Damage Observed in the June 27, 1998 Adana-Ceyhan Earthquake. Pure and Applied Geophysics, 162, 913-930.
Wessel, P. and Smith, W.H.F., 1998, New, Improved Version of the Generic Mapping Tools Released. Eos Transactions of American Geophysical Union, 79(47), 579.
Zhao, J. X., Irikura, K., Zhang, J., Fukushima, Y., Somerville, P.G., Asano A., Ohno Y., Oouchi T., Takahashi T. and Ogawa, H., 2006, An Empirical Site-Classification Method for Strong-motion Stations in Japan using H/V Response Spectral Ratio. Bulletin of the Seismological Society of America, 96(3), 914-925.