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JFA (Jurnal Fisika dan Aplikasinya)
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : 1858036X     EISSN : 24604682     DOI : -
Core Subject : Science,
Physics
JFA (Jurnal Fisika dan Aplikasinya, Abbreviation: J.Fis. dan Apl.) hanya menerbitkan artikel penelitian asli serta mengulas artikel tentang topik seputar bidang fisika (fisika teori, material, optik, instrumentasi, geofisika) dan aplikasinya. Naskah yang dikirimkan ke JFA belum pernah diterbitkan ditempat lain serta tidak dalam proses pertimbangan untuk diterbitkan ditempat lain, dalam bahasa apapun. Studi teoritis, eksperimental, dan praktis sama-sama didorong, seperti juga artikel interdisipliner dan yang timbul dari penelitian dan kolaborasi industri.
Arjuna Subject : -
Articles 423 Documents
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Estimation Earthquake Source Parameters in Mentawai Island Region Using Moment Tensor Husna, Fahmia Zuwidhatul; Sungkono, Sungkono; Fahmi, Muhammad Nurul; Minarto, Eko; Saifuddin, Saifuddin
Jurnal Fisika dan Aplikasinya Vol 21, No 3 (2025)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v21i3.22563

Abstract

Mentawai Islands is a seismically active zone that often experiences earthquakes due to the interaction of tectonic plates, so it is necessary to analyze the earthquake source parameters to understand its characteristics. This research aims to determine the earthquake source parameters in the Mentawai Islands in 2023 for earthquakes with magnitude Mw ≥ 5.5. Three-component waveform data from GEOFON network is used for moment tensor inversion process in time domain. Waveform data used in the frequency range of 0.01 to 0.025 Hz with a match value of calculation and observation data worth >70%. The results of waveform data analysis show that the earthquake in the study area was caused by tectonic activity characterized by the percentage of Double-Couple (DC) more dominant than Compensated Linear Vector Dipole (CLVD), with shallow depth. In addition, the focal mechanism of the waveform data analysis indicates that the type of fault that causes the earthquake in the study area is a reverse fault. This result is consistent with earthquake catalogs (GCMT, USGS, and GFZ).
2D Magnetotelluric (MT) Modelling for Geothermal System Interpretation Minarto, Eko
Jurnal Fisika dan Aplikasinya Vol 21, No 3 (2025)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v21i3.22613

Abstract

Geothermal systems are areas beneath the earth's surface that store circulating heat energy. The heat energy stored in the geothermal system can be utilized by humans as an environmentally friendly alternative energy. Determining the geothermal system area requires geophysical exploration methods that have deep enough penetration and can distinguish soil structures based on the value of specific resistance. One method that is effective in determining geothermal systems is the magnetotelluric (MT) method. This method receives electric and magnetic field signals from the induction of subsurface rocks to the electromagnetic wave activity of solar storms and lightning. The signal is then processed to produce a specific gravity value. This type of resistance data can then present the structure of the geothermal system, including impermeable rocks, reservoirs and magmatic intrusion zones. This study also collaborated with supporting geological and geochemical data. The results of the magnetotelluric method analysis for the geothermal system of this study area are suspected to have host rocks with a specific gravity of less than 10 Ωm spread near the surface. Reservoirs that have a specific gravity of 10-40 Ωm are located at a depth of about 1000 m below the surface based on the interpretation of all data.
LITHOLOGICAL IDENTIFICATION USING RESISTIVITY GEOELECTRIC METHOD IN LANDSLIDE AREA IN BENGLE VILLAGE Khaerunnisa, Icha
Jurnal Fisika dan Aplikasinya Vol 21, No 3 (2025)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v21i3.22812

Abstract

Desa Dlepih, tepatnya di Dusun Bengle, merupakan wilayah yang mengalami bencana tanah longsor pada tanggal 28 November 2017. Bencana tanah longsor ini terjadi di permukiman penduduk dan mengakibatkan 2 orang meninggal dunia sehingga diperlukan tindakan mitigasi. Salah satu langkah awal mitigasi adalah mengidentifikasi litologi di area tanah longsor. Penelitian ini bertujuan untuk mengetahui litologi di area tanah longsor dengan menggunakan metode geolistrik resistivitas dipole-dipole. Pengambilan data dilakukan dengan menggunakan seperangkat instrumen Naniura Resistivity Meter pada empat lintasan pengukuran. Lintasan pengukuran berada pada Formasi Semilir yang terdiri dari batuan sedimen. Hasil penelitian menunjukkan bahwa daerah longsor tersebut terdiri dari lapisan tanah dengan nilai resistivitas 2,32 Ωm – 6,69 Ωm dan ketebalan 1,26 m – 11,39 m, lapisan batulempung dengan nilai resistivitas 6,69 Ωm – 160 Ωm dan ketebalan 11 m – 40,5 m, dan lapisan batuan andesit dengan nilai resistivitas lebih dari 160 Ωm dan ketebalan 5,25 m – 37,71 m.

Page 43 of 43 | Total Record : 423

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