ИСТИНА

For the first time we have conducted the archeoseismological study in Eylatan and Kuyul’tepa ancient settlements in the Fergana Valley (Namangan Oblast’, Uzbekistan). Both settlements have traces of strongest seismic effects. In Eylatan it is a systematic 4-meters left-lateral displacement of sublongitudinal walls along a sublatitudinal seismogenic fault. In Kuyul’tepe in an archeological trench we have discovered numerous ruptures and fissures. Eylatan was apparently destroyed in I century BC by a strong (MS = 7.6, I0 = X) earthquake which seismogenic rupture reached the surface in the territory of the settlement. After this seismic event people have left a territory of the ancient city and have built comparatively small settlements around it. However other strong earthquake (I = VIII–IX in Kuyul’tepe) in the beginning of 1st millennium has destroyed these settlements too. Obtained data can be used for a new seismic hazard assessment of the Fergana depression.