IDENTIFICATION OF LIQUEFACTION POTENTIAL USING THE HVSR METHOD IN NAGARI SANIANGBAKA, X KOTO SINGKARAK DISTRICT, SOLOK REGENCY

Nanda Saputra; Ahmad Fauzi; Harman Amir; Zulhendra Zulhendra

doi:10.24036/0fjkda33

Authors

Nanda Saputra Department of Physics, Padang State University, Padang Author
Ahmad Fauzi Department of Physics, Padang State University, Padang Author
Harman Amir Department of Physics, Padang State University, Padang Author
Zulhendra Department of Physics, Padang State University, Padang Author

DOI:

https://doi.org/10.24036/0fjkda33

Keywords:

Microtremor, HVSR, Natural Frequency, Amplification, Seismic Susceptibility Index

Abstract

Nagari Saniangbaka, located in X Koto Singkarak District, Solok Regency, is one of the areas with a high risk of disaster because it is crossed by the Sumani Segment. The objective of this research is to assess the likelihood of liquefaction occurring in the region. Data collection was conducted at 19 points spread across both densely populated and sparsely populated areas. The analysis method used was the Horizontal to Vertical Spectral Ratio (HVSR), which provides information on natural frequency (f₀), amplification (A₀), the index of seismic susceptibility (Kg) and the velocity of shear waves (Vs). The analysis results show that the f₀ values range from 0.2 Hz to 14.9 Hz; A₀ from 0.96 to 9.15; Kg from 0.19 to 96.36; and Vs from 156.36 m/s to 361.56 m/s. The potential for liquefaction is determined based on the distribution of these values. From these results, it can be concluded that several locations in Nagari Saniangbaka have the potential for liquefaction, namely at measurement points T06 (densely populated residential area) and T11, T12, and T19 (sparsely populated residential areas).

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