UNDERESTIMATED SEISMIC HAZARD OF THE FERGANA DEPRESSION: NEW ARCHEOSEISMOLOGICAL DATA

R.Kh. Murudaliev4, T.K. Zakhidov2, Z.O. Rakhmanov5

1 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

2 Mavlyamov Institute of Seismology, Academy of Sciences of Republic Uzbekistan, Tashkent, Uzbekistan

3 Tashkent Departament of Gulamov Institute of Archeology Investigations, Academy of Sciences of Republic Uzbekistan, Tashkent, Uzbekistan

4 Gulyamov Institute of Archeology Investigations, Academy of Sciences of Republic Uzbekistan, Samarkand, Uzbekistan

5 Fergana State University, Fergana, Uzbekistan

* e-mail: m.usmanova@mail.ru

Abstract. For the first time we have conducted the archeoseismological study in Eylatan and Kuyul'tepe 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.

Keywords: seismic deformations, seismogenic faults, Fergana Valley, ancient earthquakes, Uzbekistan, Namangan Oblast', Western Tien Shan, Eylatan, Kuyul'tepe.

About the authors

KORZHENKOV Andrey M. – Dr. Sci. (geol.-min.), head of laboratory, Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Russia, 123242, Moscow, Bolshaya Gruzinskaya st., 10-1. Tel.: +7 (916) 226-90-92. E-mail: korzhenkov@ifz.ru

USMANOVA Makhira T. – Cand. Sci. (Phys. and Math.), senior researcher, Mavlyamov Institute of Seismology of Academy Sciences of Republic Uzbekistan. Uzbekistan, 100128, Tashkent, Zulfiyakhonim st., 3. Tel.: (+99871) 241-51-70. E-mail: m.usmanova@mail.ru

ANARBAEV Abdulkhamid A. – Dr. Sci. (Hist.), head of Tashkent Department of Gulyamov Institute of Archeology investigations of Academy Sciences of Republic Uzbekistan. Uzbekistan, 100047, Tashkent, Gulamov st., 70. Tel.: (+99871) 233-46-02. E-mail: anarbaev-ahsi@mail.ru

MAKSUDOV Farkhad A. – Dr. Sci. (Hist.), director, Gulyamov Institute of Archeology investigations of Academy Sciences of Republic Uzbekistan. Uzbekistan, 703051, Samarkand, Abdullaev st., 3. Tel.: (+99866) 232-15-13. E-mail: uzarchae@inbox.uz

MURODALIEV Rakhmonali Kh. – post graduate student, Gulyamov Institute of Archeology investigations of Academy Sciences of Republic Uzbekistan. Uzbekistan, 703051, Samarkand, Abdullaev st., 3. Tel.: (+99866) 232-15-13. E-mail: rakhmonmurod@mail.ru

ZAKHIDOV Takhir K. – senior specialist, Mavlyamov Institute of Seismology of Academy Sciences of Republic Uzbekistan. Uzbekistan, 100128, Tashkent, Zulfiyakhonim st., 3. Tel.: (+99871) 241-51-70. E-mail: takhir.zakhidov.58@bk.ru

RAKHMANOV Zafar O. – lecturer, Fergana State University. Uzbekistan, 150100, Fergana, Murabbiilar st., 9. Tel.: (+99897) 737-55-12. E-mail: zafarrakhmonov84@mail.ru

Cite this article as: Korzhenkov A.M., Usmanova M.T., Anarbaev A.A., Maksudov F.A., Murudaliev R.Kh., Zakhidov T.K., Rakhmanov Z.O. Underestimated seismic hazard of the Fergana depression: New archeoseismological data, Geofizicheskie Protsessy i Biosfera (Geophysical Processes and Biosphere), 2019, vol. 18, no. 3, pp. 77–90 (in Russian). https://doi.org/10.21455/gpb2019.3-5

English version: Izvestiya, Atmospheric and Oceanic Physics, 2019, vol. 55, iss. 10. ISSN: 0001-4338 (Print), 1555-628X (Online). https://link.springer.com/journal/volumesAndIssues/11485