The central and northern Turkey witnessed devastating damages following the 2023 Turkey-Syria earthquakes (EQs). The damages were mainly attributed to the twin main shocks (having Mw of 7.7 and 7.6) followed by thousands of aftershocks experienced in the region. Significant surface manifestations that followed these EQs were reported to be landslides and liquefaction. This study primarily ponders on the identification of these liquefied sites through Horizontal-to-Vertical Spectral Ratio (HVSR) method. For the purpose, the ground motion (GM) records from 28 strong motion recording stations spread across Hatay province of Turkey are collected. Two average HVSR curves are generated for 28 strong motion recording stations. These curves define the average HVSR that are either inclusive or exclusive of the 2023 EQs. Based on the SESAME guidelines, the predominant frequency (fpeak) and the corresponding peak amplitude (Apeak) are defined for the curves generated. This study highlights the changes in fpeak observed for the sites pertaining to the exposure to 2023 EQs. The recording stations hosting such changes are demarcated as liquefied sites due to 2023 EQs. These liquefied sites so identified are found comparable to the existing literature. For the identified liquefied sites, the extent of liquefaction is assessed through vulnerability index (Kg). Thus, this study outlines an efficient method to demarcate liquefied sites for the study region.

错误:搜索内容不能为空,请输入英文关键词
错误:关键词超出字数限制,请精简
高级检索

Identification of Liquefied Regions in Hatay Region, Turkey Using Horizontal-to-Vertical Spectral Ratio (HVSR)

  • R. V. S. Jenny Laura,
  • Abhishek Kumar

摘要

The central and northern Turkey witnessed devastating damages following the 2023 Turkey-Syria earthquakes (EQs). The damages were mainly attributed to the twin main shocks (having Mw of 7.7 and 7.6) followed by thousands of aftershocks experienced in the region. Significant surface manifestations that followed these EQs were reported to be landslides and liquefaction. This study primarily ponders on the identification of these liquefied sites through Horizontal-to-Vertical Spectral Ratio (HVSR) method. For the purpose, the ground motion (GM) records from 28 strong motion recording stations spread across Hatay province of Turkey are collected. Two average HVSR curves are generated for 28 strong motion recording stations. These curves define the average HVSR that are either inclusive or exclusive of the 2023 EQs. Based on the SESAME guidelines, the predominant frequency (fpeak) and the corresponding peak amplitude (Apeak) are defined for the curves generated. This study highlights the changes in fpeak observed for the sites pertaining to the exposure to 2023 EQs. The recording stations hosting such changes are demarcated as liquefied sites due to 2023 EQs. These liquefied sites so identified are found comparable to the existing literature. For the identified liquefied sites, the extent of liquefaction is assessed through vulnerability index (Kg). Thus, this study outlines an efficient method to demarcate liquefied sites for the study region.