S. Abdullaev¹ , V. Maslov¹ , T. Davlatshoev¹

¹S.U.Umarov Physical Technical Institute Avademy of Science of the Republic of Tajikistan

Abstract:

The Geophysical Survey of the Academy of Sciences of the Republic of Tajikistan has modern seismic stations for seismic monitoring and also for monitoring of nuclear explosions. The seismic stations of Tajikistan registered the sixth nuclear test of North Korea on September 3, 2007 at 03:38:09 (S.H.Negmatullaev, F.Yu. Devonashoev, T.P.Ulubaeva . Modern system of seismic monitoring // Dushanbe, 2018, 21p). In recent years phenomena occurring in the atmosphere in advance of the upcoming earthquakes have been actively studied: changes in air temperature and atmospheric pressure, anomalous change of atmospheric transparency (optical thickness), water vapor content, Angstrom parameter, aerosol optical thickness of the fine and coarse fraction, ozone and nitrogen dioxide content in the vertical column of the atmosphere. The results of the investigation of the isotope distributions of Tl-208, Pb-212, Ac-228, Pb-214, Bi-214, Th-234, Ra-226, Pb-210, Cs-137, Be-7 and K-40 in the atmospheric aerosol samples of the southern, central and northern parts of Tajikistan are also presented.