Determining the site effects of 23 October 2011 earthquake (Van province, Turkey) on the rural areas using HVSR microtremor method

Journal of Earth system science

M Alper Åžengül5³  Ali Özvan2²  Ä°smail Akkaya1⁴  Mücip Tapan3 4¹ 

[1] Department of Civil Engineering, Yüzüncü Yıl University, Van, Turkey.$$;Department of Geological Engineering, Yüzüncü Yıl University, Van, Turkey.$$;Department of Geological Engineering, Istanbul University, Ä°stanbul, Turkey.$$;Department of Geophysical Engineering, Yüzüncü Yıl University, Van, Turkey.$$

关键词: Van-Turkey;    rural areas;    earthquake;    ambient noise;    HVSR;    soil conditions.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

A magnitude of 7.1 Mw earthquake struck Van city on October 23, 2011. Although, construction practices of all rural housing units are similar in the region, the earthquake caused massive damage to villages located on soft soils in northern region of the city. In this study, the effects of soil conditions on damaged housing units were determined by conducting horizontal to vertical spectral ratios of microtremor (HVSR) measurements. The level of damage in the villages that are settled on lacustrine and stream sediments has verified that the damage correlates well with comparatively high HVSR peak period and HVSR peak amplitude values in the range of 0.2–1.6 s and 4–10, respectively. The HVSR peak period and HVSR peak amplitude levels on rock units are in the range of 0.1–0.2 s and 1.5–2, respectively. It is important to note that hillside effect is found to be another key factor that increased the level of damage to the housing units in some villages.

【 授权许可】

Unknown