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All Journal Jurnal Rekayasa Geofisika Indonesia
Abdul Manan
Jurusan Teknik Geofisika, Universitas Halu Oleo
Computer Science & IT Earth & Planetary Sciences Engineering Physics

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Identifikasi Potensi Tingkat Kerusakan Gempabumi Berdasarkan Indeks Kerentanan Seismik Menggunakan Metode Hvsr di Kecamatan Kadia Kota Kendari La Hamimu Hamimu; Abdul Manan; Risky Ramadhani
Jurnal Rekayasa Geofisika Indonesia Vol. 5 No. 01 (2023): Edisi April Jurnal Rekayasa Geofisika Indonesia (JRGI)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v5i01.16

Abstract

This research was conducted to identify the potential level of earthquake damage in Kadia District, Kendari City. The potential level of damage is known based on the seismic vulnerability index parameter. The data used is microtremor data obtained from the results of the frequency filtering process of ground vibration data using a Band Pass Filter type with a frequency range of 1.00 to 25.00 Hz. While the ground vibration data was obtained from the results of direct measurements in the field at 16 measurement points using 1 set of portable seismograph TDL 303S. Furthermore, the data is processed using the Horizontal to Vertical Spectral Ratio (HVSR) method to produce the dominant frequency of the soil and the amplification factor used to calculate the seismic vulnerability index. From the results of data processing carried out scientifically in Kadia District, Kendari City, a seismic vulnerability index value was obtained with values ranging from 0.761 to 5.292 /cm. Based on the results of mapping of the potential level of earthquake damage obtained from the results of the seismic vulnerability index value, it shows that Kadia District, Kendari City has a low to moderate potential for damage due to earthquakes. Low zones with seismic vulnerability index values ​​< 3 are scattered in Kadia, Bende, Anaiwoi, and Wowawanggu Villages. Moderate zones with seismic vulnerability index values ​​< 3 to 6 are scattered in Kadia, Pondambea, and Bende Villages.
Identifikasi Ketebalan Lapisan Sedimen Menggunakan Data Mikrotremor Di Kecamatan Kadia Kota Kendari La Hamimu Hamimu; Agnes Maindan; Abdul Manan
Jurnal Rekayasa Geofisika Indonesia Vol. 5 No. 02 (2023): Edisi Agustus Jurnal Rekayasa Geofisika Indonesia (JRGI)
Publisher : Program Studi Teknik Geofisika FITK UHO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/jrgi.v5i02.21

Abstract

This study aims to determine the value of the distribution of sediment layer thickness. This research was conducted in the Kadia District area, Kendari City, with data collection carried out at 16 measurement points with intervals for each point varying from 400 to 600 meters with a sampling frequency of 100 Hz. The data obtained from this study is in the form of ground vibration data which is then downloaded software DataPro.exe East-Westhorizontal component, the North-South vertical component Up-Down. The downloaded microtremor data is then processed using a device software Geopsy 4.3.2 to obtain the H/V curve. The dominant frequency value (f0) is obtained from the H/V curve with a dominant frequency range of 1.247 Hz to 4.955 Hz and the shear (VS30) is obtained from the website www.USGS.gov with a VS30 of 276 m/s up to 301 m/s. Based on the data that has been obtained, the distribution value of the sediment layer thickness (h) will be determined. The value of the thickness of the sediment layer (h) in the study area ranged from 13,016 meters to 59,473 meters.
Co-Authors Agnes Maindan La Hamimu Hamimu Risky Ramadhani