Abstract
The paper discusses the possible source fault which resulted in the M w 6.4 Eskisehir earthquake on February 20, 1956, within the Anatolian complex. This is particularly important in view of the fact that Eskisehir, built mainly on alluvium, has a population of 500,000. The damage data were reviewed related to the number of people in the various villages affected. An empirical attenuation equation derived from Anatolian seismicity was applied to three suspected fault segments and the resultant ground motion rates were statistically compared with the damage data. A number of equally distributed suspected epicentres on each segment were considered. It is concluded that the earthquake was probably related to the Kavacik fault
Résumé
L’article présente les conclusions de la recherche de la faille source à l’origine du séisme d’Eskisehir, de magnitude M w = 6.4, qui eut lieu le 20 février 1956, au sein du complexe anatolien. Cette démarche est importante car la ville d’Eskisehir, construite principalement sur des alluvions, a actuellement une population de 500 000 habitants. Les données relatives aux dommages ont été analysées par rapport au nombre de personnes habitant les villages alentour à l’époque. Une équation empirique d’atténuation, correspondant au contexte sismique anatolien, a été appliquée pour les trois segments de faille possibles et les sollicitations sismiques au sol correspondantes ont été mises en rapport avec les dommages observés. Plusieurs épicentres rattachés à chaque segment de faille ont été considérés. La faille de Kavacik apparaît être probablement à l’origine du séisme.
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Ocakoglu, F., Acikalin, S., Gokceoglu, C. et al. Back-analysis of the source of the 1956 Eskisehir Earthquake using attenuation equation and damage data. Bull Eng Geol Environ 66, 353–360 (2007). https://doi.org/10.1007/s10064-006-0066-x
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DOI: https://doi.org/10.1007/s10064-006-0066-x