Geophysical Journal | 2009 volume 31 1

The Krivoy Rog earthquake of the 25th of December 2007

© Kutas V.V., Omelchenko V.D., Drogitskaya G.M., Kalitova I.A.

It has been noted that in the earthquakes catalogue on the territory of the East-European platform there is no information on manifestations of seismic activity within the Ukrainian Shield in the area of Krivoy Rog-Krementchug fault. The earthquake focus of the 25th of December 2007 coincides with the position of this fault, bounding the Ingulets-Krivoy Rog suture zone from the East. Relation of seismic activity within the area of the fault, which devides the Ingul and the Middle-Dnieper blocks of the Shield with tectonics has been considered. Special features of the deep structure of the lithosphere have been analysed - increased layering of the crust and the mantle, alteration of values of strata velocities near the Krivoy Rog-Krementchug fault and steep dipping of the Moho boundary (from to 38 to 53 km) as well as change of sign in vertical movements of the earth's crust during the latest decades of the 20th century.

<<back |