Problems of Engineering Seismology: article

Аnnotation: Our archeoseismological study at well-known Uzgen medieval Karakhanids mausoleum complex in the Fergana Valley have shown that Northern and Southern Mausoleums were undergone by multidirectional deformation. It is difficult to say something specific about Middle Mausoleum because of its serious destructions and following major renovation. Upper part (housing) of Northern Mausoleum was torn of a basement and moved southward because of inertia forces. This event has apparently occurred in between 1152 and 1187. Upper part of Southern Mausoleum has moved northward, however a clockwise rotation of its SE wall and a rupture in SW wall can mean an arrival of the seismic motions from NNW. It is possible that here there were occurred two strong earthquakes. The first earthquake has damaged or Northern Mausoleum and destroyed of Middle Mausoleum. The second earthquake has damaged Southern Mausoleum. Magnitudes of both earthquakes were great (M ≥ 7): the displacements of the housings of both mausoleums during these seismic events testify about ground seismic accelerations exceeding g – an acceleration of free fall. Paleoseismological study of active fault to the north and south of Uzgen will allow defining the earthquakes parameters.