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All Journal JOURNAL ONLINE OF PHYSICS Jurnal Pendidikan Matematika (JUDIKA EDUCATION)
Muzli, Muzli
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Education Mathematics Physics

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Integrasi Kurva Horizontal To Vertical Spectral Rasio (Hvsr) dan Kurva Eliptisitas Gelombang Rayleigh untuk Penentuan Indeks Kerentanan Seismik (Kg): Sains Sujabar, Sujabar; Adhi, M. Aryono; Muzli, Muzli; Sofian, Sofian; Fatoni, Iza
Jurnal Pendidikan Matematika : Judika Education Vol. 8 No. 5 (2025): Jurnal Pendidikan Matematika:Judika Education
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/2dzgrb16

Abstract

This study aims to determine the seismic vulnerability index using microtremor data in Parigi City. A microtremor survey was conducted at 81 sites across the city. The data were analyzed to obtain the Horizontal to Vertical Spectral Ratio (HVSR) curve and the Rayleigh wave ellipticity curve. These two curves were combined to derive the dominant frequency (f₀) and amplification factor (A₀). The Rayleigh wave ellipticity curve was used to guide the determination of the dominant frequency (f₀) and amplification factor (A₀) on the HVSR curve. The results were then used to calculate the seismic vulnerability index (Kg). The peak of the Rayleigh wave ellipticity curve (Aₑₗₗ) can assist in identifying the dominant frequency (f₀), both when the A₀ peak is clearly visible (clear peak) and when there are multiple or unclear peaks. The use of Aₑₗₗ also helps refine the determination of A₀ values, yielding more stable results. The final mapping results show that the dominant frequency values range from 0.26 Hz to 2.9 Hz, the amplification factor ranges from 1.61 to 4.77, and the seismic vulnerability index ranges from 1.47 to 113.59. Conclusion, The integration of the HVSR curve and the Rayleigh wave ellipticity curve carried out in this study shows that both can be combined and complement each other.   Keywords: Dominant Frequency (f0), Amplification Factor (A0), Seismic Vulnerability Index (Kg), Rayleigh Wave Ellipticity Curve, Horizontal-to-Vertical Spectral Ratio (HVSR) Curve
PEMETAAN BAHAYA GEMPA BUMI BATUAN DASAR DI KOTA MAKASSAR MENGGUNAKAN PROBABILISTIC SEISMIC HAZARD ANALYSIS Rajagukguk, Martha Lisauli; Muzli, Muzli; Wallansha, Robby; Rahmatullah, Fajri Syukur; Pramono, Sigit
JOURNAL ONLINE OF PHYSICS Vol. 11 No. 3 (2026): JOP (Journal Online of Physics) Vol 11 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v11i3.58633

Abstract

Kota Makassar merupakan salah satu pusat pertumbuhan di Indonesia bagian timur yang memiliki berbagai infrastruktur strategis sehingga memerlukan informasi bahaya gempa bumi sebagai dasar perencanaan pembangunan dan mitigasi bencana. Penelitian ini bertujuan menganalisis tingkat bahaya gempa bumi di Kota Makassar menggunakan metode Probabilistic Seismic Hazard Analysis (PSHA). Analisis dilakukan menggunakan perangkat lunak OpenQuake Engine dengan model sumber gempa Indonesia (PuSGeN, 2024) yang meliputi sesar aktif, subduksi, dan background seismicity. Parameter yang dihitung berupa Peak Ground Acceleration (PGA) serta Spectral Acceleration (SA) periode 0,2 detik dan 1 detik pada kondisi batuan dasar untuk probabilitas terlampaui 10% dan 2% dalam 50 tahun. Hasil penelitian menunjukkan bahwa nilai PGA berkisar 0,0534-0,0565 g untuk probabilitas terlampaui 10% dalam 50 tahun dan 0,1120-0,1180 g untuk probabilitas terlampaui 2% dalam 50 tahun. Nilai SA periode 0,2 detik berkisar 0,0939-0,0987 g dan 0,2028-0,2133 g, sedangkan SA periode 1 detik berkisar 0,0256-0,0263 g dan 0,0466-0,0482 g. Distribusi bahaya menunjukkan kecenderungan peningkatan pada bagian utara Kota Makassar yang dipengaruhi oleh kontribusi Sesar Walanae. Hasil penelitian ini diharapkan dapat menjadi referensi dalam evaluasi bahaya seismik serta mendukung perencanaan bangunan tahan gempa dan mitigasi bencana di Kota Makassar.
Co-Authors Aryono Adhi, Aryono Fatoni, Iza Rahmatullah, Fajri Syukur Rajagukguk, Martha Lisauli Sigit Pramono Sujabar, Sujabar Wallansha, Robby