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All Journal Jurnal Fisika Unand JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar KARST : Jurnal Pendidikan Fisika dan Terapannya Jurnal Fisika dan Terapannya
Minarti Minarti
UIN Alauddin Makassar
Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics Other

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Klasifikasi Kedalaman Kejadian Gempa Menggunakan Algoritma K-Means Clustering: Studi Kasus Kejadian Gempa Di Sulawesi Amirin kusmiran; Minarti; Muhammad Fawzy Ismullah Massinai; Ahmad Zarkasi; A. Andira Maharani; Rita Desiani
JFT : Jurnal Fisika dan Terapannya Vol 9 No 2 (2022): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v9i2.29198

Abstract

Sulawesi region is one of the region that have complex geologic conditions so that disasters caused by large scale earthquake frequently occur in these region. Depth and magnitude attribute of the earthquake that cause the disasters are investigation using machine learning technique. Longitude, latitude, magnitude, depth attributes are used to depth cluster of the earthquake events in 1970-2022 period. The cluster number have been optimized by Elbow method, and validated by Davies-Bouldin index (DBI). The result is shown that the three cluster is the best cluster than the others, and its Davies-Boludin index is 0.397. Depth of the fist cluster is less than equal to 120 km (shallow earthquake), the second cluster is among 120 km and 350 km (intermediate earthquake), and the third cluster is greater than 350 km (deep earthquake). The cluster visualizations of the earthquakes are revealed that shallow earthquakes with above 5 SR are frequently occurred in shallow depth. Based on results, Sulawesi Region is vulnerable to earthquake hazard, and K-Mean clustering algorithm is successfully to cluster of earthquake depth.
IDENTIFIKASI UNSUR TANAH LITOSOL DENGAN METODE XRF (X-RAY FLUORESCENCE) DAN FTIR (FOURIER TRANSFORM INFRA RED) BERDASARKAN TITIK ELEVASI DI DESA SAMANGKI KECAMATAN SIMBANG KABUPATEN MAROS Jumardin Jumardin; Andi Syam Rizal; Minarti Minarti; Abdul Munim Thariq; Nurhafida Turayni; Wahyullah Wahyullah
Karst: Jurnal Pendidikan Fisika dan Terapannya Vol 6 No 1 (2023): Karst : Jurnal Pendidikan Fisika dan Terapannya
Publisher : Program Studi Pendidikan Fisika FKIP Universitas Muslim Maros

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46918/karst.v6i1.1733

Abstract

XRF method to determine elemental content and FTIR test to determine the nature of chemical compounds (functional groups) of Litosol soil at the slope (elevation angle) and the distance of the research trajectory lines. The identified elemental levels are Fe, Si, Ti, K, Mn and Ca. Fe represents the highest elemental content value for each research path. Fe for paths (1-2) are 23.82 % and 37.69%, tracks (5-6) are 23.11% and 37.47%, and paths (9-10) are 40.44% and 33.99% at different elevation angles. The lowest element level is Ca. The value of Ca for each track is 0.24% and 0.66% (1-2), 0.28% and 0.30% (5-6) and 0.27% and 0.62% (9-10) for each different elevation angle. The FTIR method to determine functional groups (chemical compounds) uses the same parameters as the XRF method. The O-H functional groups were detected at wave numbers 3698.31 cm-1 and 3620.34 cm-1 with the theoretical accuracy ranges of 3700-3000 cm-1 and 3590-3650 cm-1. The C=C which is a double bond functional group was detected at wave number 1640.8 cm-1 in the theoretical range of 1610-1680 cm-1. The C-H functional group on each track was detected in three different types of wave numbers with values of 908.99 cm-1, 786.86 cm-1 and 746 cm-1, respectively. The range of wave number accuracy for C-H is 690-900 cm-1.
ANALISIS POTENSI SUMBER DAYA BATUGAMPING DI KAWASAN KARST DESA SAMANGKI, KABUPATEN MAROS, SULAWESI SELATAN Minarti Minarti; Jumardin Jumardin; Abdul Munim; Muhammad Fawzy Ismullah Massinai; Arif Wijaya
JFT : Jurnal Fisika dan Terapannya Vol 8 No 2 (2021): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v8i2.26239

Abstract

Research has been carried out in Samangki Village which aims to analyze the potential of limestone resources using the Geoelectrical Resistivity Method with the Wenner-Schlumberger configuration. Data were collected at 801904.40-802051.05 NE and 9440758.03-9440548.93 SW for 3 lines along 120 m with 10 m electrode space in a track. Acquired data were processed using Microsoft Excel, Notepad, RES2DINV, ArcGIS, and Google Earth applications to produce resistivity cross-sections and other supporting maps. Based on data interpretation, it shows that the low resistivity zone is an alluvium deposit (Qac) with resistivity value of 17.58 to 170 Ωm; and the high resistivity zone indicates the presence of limestone which is part of the Tonasa Formation (Temt). The presence of limestone on line-1 with resistivity value of 326.00 to 931.90 Ωm at position(x) 60 to 90 m, in depth(y) 1.25 to 9.26 m as shallow area, and at position 40-45 m in depth 16 to 19.8 m as the deepest area. Then the limestone on line-2 is indicated as a subsurface karst tower with a resistivity value of 462.00 to 809.36 Ωm at position 30 to 50 m in depth 1.25 to 19.8 m. Limestone also located on the northeastern edge of line-3  with resistivity values of 431.00 to 739.66 Ωm at a position of 12.5 to 17.5 m in depth of 1.25 to 6.38 m. It proves that Samangki Village has large potential for limestone resources. This research need further geoelectrical study with broad coverage area and geochemical analysis for detail karst characterization
Pemodelan Struktur Lapisan Bawah Permukaan Berdasarkan Tahanan Jenis di Dusun Rombo Desa Saukang Kecamatan Sinjai Timur Kabupaten Sinjai Provinsi Sulawesi Selatan Aqil Naufaldy Rifanzha; Muh Said Lanto; Minarti Minarti
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.564-572.2024

Abstract

Research has been carried out which aims to model the structure of the subsurface layers in Rombo Hamlet, Saukang Village, East Sinjai District, in Sinjai Regency. This research uses the resistivity geoelectric method of the Wenner-Schlumberger configuration. The number of measurement paths consists of five tracks, each 150 m. The geology of the research location includes the Walanae Formation, which consists of sandstones, conglomerates, tuffs, siltstones, claystones, limestones, and marls. The results of the study allegedly show that the subsurface structure consists of several layers with interpretations in the form of groundwater aquifers, sandstones, and claystones. The first track shows a resistivity value of 0.753 Ωm to 3.22 Ωm where there are free aquifers at a depth of 1.25 meters to 24.0 meters, the second track has free aquifers and confined aquifers with resistivity values of 0.976 Ωm to 3.75 Ωm which are at a depth of 1.25 meters to 28.7 meters, the third track shows a resistivity value of 0.643 Ω to 2.46 Ωm there are free and confined aquifers that spread at depths of 15.9 meters to 28.7 meters, the fourth line has free aquifers and aquifers The depressed aquifer which has a resistivity value of 1.83 Ωm to 6.27 Ωm is at a depth of 5.19 meters to 28.7 meters, while on the fifth line at a depth of 1.25 meters to 28.7 meters there are free aquifers and confined aquifers which have resistivity value of 0.801 Ωm to 4.10 Ωm.
Monitoring Potensi Tanah Longsor Menggunakan Metode Resistivitas Di Desa Samangki Kecamatan Simbang Kabupaten Maros Andi Syam Rizal; Jumardin; Minarti; Aryadi Nurfalaq; Agussalim
JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Vol 11 No 2 (2023)
Publisher : Pendidikan Fisika UIN Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jpf.v11i2.37314

Abstract

Penelitian ini bertujuan untuk mengetahui area rawan longsor menggunakan metode resistivitas di Desa Samangki Kecamatan Simbang Kabupaten Maros. Penelitian ini dilakukan di Desa Samangki Kecamatan Simbang Kabupaten Maros pada 5 titik di lereng jalur Maros – Bone. Pengukuran dilakukan untuk mendeteksi potensi tanah longsor menggunakan metode resistivitas konfigurasi wenner alpha. Data yang diperoleh berupa besar tegangan dan arus kemudian dianalisis melalui Software Microsoft Excel dan Res2DInv untuk mendapatkan penampang model 2-Dimensi. Hasil penampang 2-D digunakan untuk memperoleh struktur batuan di bawah permukaan bumi. Hasil penelitian menunjukkan adanya lapisan napal pasiran, gamping pasiran, dan gamping koral pada wilayah pengukuran yang merupakan bagian dari formasi tonasa batugamping. Adapun area yang rawan terjadi tanah longsor yaitu pada lintasan 2, lintasan 3, lintasan 4, dan lintasan 5, kecuali lintasan 1 yang masih didominasi oleh batuan yang memiliki nilai resistivitas tinggi dan mampu menahan area yang beresistivitas rendah di bagian atas lereng. Sedangkan ke 4 lintasan lainnya berada di area yang curam dan terindikasi adanya rekahan yang tersaturasi air, sehingga berpotensi terjadi tanah longsor pada jarak yang sama yakni 110 meter.
Co-Authors A. Andira Maharani Abdul Munim Abdul Munim Thariq Agussalim Ahmad Zarkasi Amirin Kusmiran Andi Syam Rizal Aqil Naufaldy Rifanzha Arif Wijaya Aryadi Nurfalaq Jumardin jumardin jumardin Muh. Said L Muhammad Fawzy Ismullah Massinai Muhammad Fawzy Ismullah Massinai Nurhafida Turayni Rita Desiani Wahyullah Wahyullah