Geophysical processes and biosphere: article

Аnnotation: With the help of the archaeoseismological method, in the fall of 2022, damages were studied at the 16th-century Rawat Abdullahan Mosque in Osh city in the east of the Fergana valley. Seismic deformations related, apparently, to the strong Kokand earthquake that occurred in 1822 were revealed. This is a significant horizontal displacement of the upper part of the mosque relative to the lower, systematic tilts of the colonnades, as well as rotations around the vertical axis, both of individual parts of the mosque and the building as a whole. Such severe damage could have been caused by seismic oscillations with a strength of Il = VIII‒IX (according to MSK-64 scale). The Rawat Abdullahan Mosque was built on the ruins of two older structures. It is possible that the de-struction of these buildings: 1) the construction of the pre-Mogol period and 2) presumably the Jauza mosque mentioned in the Babur-nama led to two more seismic events of the XII and XV centuries. The first earthquake, in all probability, also served as a source of destruction of the Karakhanid-age bath complex located next to the mosque. The sources of seismic oscillations were tectonic movements along the zones of adyr faults and folds located near the Rawat Abdullahan Mosque. It is possible that the initiator of seismic damage to the mosque was Mount Sulaiman-Too, an actively growing anticlinal adyr fold, at the eastern foot of which the studied medieval structure is located.