Jurnal Rekayasa Geofisika Indonesia
Vol. 6 No. 02 (2024): Edisi Agustus JRGI (Jurnal Rekayasa Geofisika Indonesia)

Analisis Ground Shear Strain HVSR untuk Mengidentifikasi Potensi Gerakan Tanah di Kecamatan Kadia, Kota Kendari

Kristiani Eka Ratte (Department of Geophysical Engineering, Halu Oleo University)
Abdul Manan (Department of Geophysical Engineering, Halu Oleo University)
Laode Ihksan Juarzan (Department of Geophysical Engineering, Halu Oleo University)



Article Info

Publish Date
29 Jul 2024

Abstract

This research on Ground Shear Strain (GSS) was carried out to determine the potential for ground movements in Kadia District, Kendari City. In its implementation, GSS is processed using microtremor data from measurements in the field. GSS is the result of multiplying the Seismic Vulnerability Index (Kg) and the basement Peak Ground Acceleration (PGA). Microtremor data were taken at 16 measurement points with a distance between measurement points of 400 to 600 m. The microtremor data were then analyzed using the HVSR (Horizontal to Vertical Spectral Ratio) method available in Geopsy 3.3.6 software to obtain predominant frequency values (f­o) and amplification factors (Ao). These two parameters are used to calculate the Kg value. The PGA value is determined using the Fukushima and Tanaka empirical formula using earthquake data with a depth of ≤ 50 km and surface magnitude (MS) ≥ 5 SR. The research results show that the GSS values in Kadia District, Kendari City ranges from 1.1768x10-4 to 6.5436x10-4. Based on the results of ground movement analysis, it is known that Kadia District, Kendari City, has the potential to experience cracks or land subsidence if an earthquake occurs with elasto-plastic soil dynamics. Apart from that, it is also known that the Kadia District area of Kendari City is not prone to landslides and liquefaction because g < 10-2.

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Journal Info

Abbrev

journal

Publisher

Subject

Computer Science & IT Earth & Planetary Sciences Engineering Physics

Description

JRGI (Jurnal Rekayasa Geofisika Indonesia) merupakan jurnal ilmiah yang memuat hasil-hasil penelitian yang mencakup kajian teoretik, simulasi dan modeling, eksperimen, rekayasa dan eksplorasi dalam bidang Geofisika dan Aplikasinya. Bidang-bidang yang masuk dalam ruang lungkup jurnal ini adalah: ...