Site Amplification Analysis of Dushanbe City Area, Tajikistan to Support Seismic Microzonation

Being a country exposed to strong seismicity, the estimation of seismic hazard in Tajikistan is essential for urbanized areas, such as rapidly growing capital city Dushanbe. To ensure people’s safety and adequate construction work, detailed microzonation key proper planning. Existing estimations date back 1978; they are based on engineering geological investigations observed macroseismic data. Thereupon relies Tajik Building Code, which considers intensities according Medvedev–Sponheuer–Karnik Scale, MSK-64. However, this code does not accurately account soil types, vary considerably Dushanbe—not only by their nature, but also due increasing anthropogenic influences. In study, we performed series analyses microtremor array measurements, refraction tomography, instrumental data recording from permanent stations standard spectral ration mobile horizontal vertical ratio order provide comprehensive full-cover Dushanbe accounting types. Our results identify several critical areas where major damage likely occur during earthquakes.