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Wiwit Suryanto
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Departemen Fisika, Fakultas MIPA Universitas Gadjah Mada. Sekip Utara PO BOX BLS 21, 55281, Yogyakarta, Indonesia
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Jurnal Fisika Indonesia
Published by Universitas Gadjah Mada
ISSN : 14102994     EISSN : 25798820     DOI : https://doi.org/10.22146/jfi.v23i3.41404
Core Subject : Science, Education,
Astronomy Earth & Planetary Sciences Education Energy Physics
Jurnal Fisika Indonesia (JFI) Is an open access scientific peer-reviewed journal published by Department of Physics Universitas Gadjah Mada that publishes researches on Physics, covering both theory, experiments, computation and applied physics including geophysics. We have a mission to build scientific research foundations in theoretical and applied physics to support education, research and community service in Indonesia. A manuscript can be written in English or in Bahasa Indonesia, but Abstracts are required to be written in English. All submitted manuscripts will be reviewed thoroughly by the committee of editors and reviewers. Publication in this journal is free of charge and is periodically done three times a year (April, August, and December).
Arjuna Subject : Fisika dan Astronomi - Condensed Matter Physics
Articles 5 Documents
 1 
Search results for , issue "Vol 22, No 3 (2018)" : 5 Documents clear
Model Reservoir Formasi Woniwogi Blok ”FRD”, Cekungan Akimeugah Menggunakan Metode Seismik Multiatribut Fitri Rusmala Dewi; Sugeng Sapto Surjono; Djoko Wintolo
Jurnal Fisika Indonesia Vol 22, No 3 (2018)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfi.v22i3.43052

Abstract

Cekungan Akimeugah merupakan salah satu cekungan yang berpotensi adanya kandungan minyak dan gas bumi. Daerah penelitian, Blok ”FRD” berada di lepas pantai sebelah utara Laut Arafura. Top Formasi Woniwogi menjadi batas atas penelitian dan Top Formasi Kopai menjadi batas bawah penelitian. Tujuan dari penelitian ini untuk mengkarakterisasi reservoir dan menentukan zona prospek pada daerah penelitian. Penelitian ini menggunakan data 3 sumur (FRD1, FRD2 dan FRD3) dan data seismik 26 lintasan 2D PSTM untuk pengolahan seismik multiatribut. Metode ini digunakan untuk memprediksi beberapa properti fisik dari bumi dengan menggunakan lebih dari satu atribut. Pengolahan data diawali dengan identifikasi well seismic tie, picking horizon dan picking patahan, membuat peta bawah permukaan, inversi seismik dan multiatrbut. Software yang digunakan yaitu Hampson Russel 8 dan Petrel 2015. Dari hasil inversi dan multiatribut, Formasi Woniwogi sumur FRD1 ini memiliki nilai impedansi akustik rendah 20.000 − 26.500 ((ft/s)/(g/cc)), nilai gamma ray rendah sampai sedang 70 − 150 API, dan nilai porositas efektif tinggi 6 − 8%. Dari hasil tersebut, sumur FRD1 pada Formasi Woniwogi dapat diinterpretasikan sebagai potensial reservoir hidrokarbon.
Pengaruh Stack Berpori Acak Bahan Alami, Sintesis dan Logam pada Sistem Pendingin Termoakustik Qonitatul Hidayah; Pulih Asmara; Mega C Gupita; Ikhsan Setiawan; Agung Sambang Setyo Utomo
Jurnal Fisika Indonesia Vol 22, No 3 (2018)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfi.v22i3.43943

Abstract

Telah dilakukan penelitian mengenai pengaruh stack berpori acak bahan alami (gambas), sintetis (dacron), dan kasa logam (mesh) serta diberi penukar kalor tambahan yang dialiri air. Adapun Resonator yang digunakan berbentuk silinder dengan satu ujung tertutup, sedangkan ujung terbukanya dihubungkan dengan loudspeaker yang menyediakan gelombang bunyi (sistem standing wave). Hasil yang diperoleh adalah bahwa telah terjadi perubahan suhu pada tandon di kiri - kanan stack gambas (bahan alami), dakron (sintetis) atau mesh kasa (logam) yang kemudian disebut tandon panas dan dingin. Penurunan suhu tandon dingin terbesar menggunakan jenis stack gambas (6 cm) dengan penurunan suhu sebesar (11, 3 ± 0, 1) oC, stack dakron (8 cm) sebesar (13, 6 ± 0, 1) oC, dan stack mesh logam sebesar (6, 1 ± 0, 1) oC. Bahkan menggunakan sistem gelombang berjalan, penurunan suhu dapat mencapai 21, 5 oC (dari 26, 5 oC menjadi 5, 1 oC). Dengan demikian telah terwujud sebuah pendingin termoakustik menggunakan stack gambas, dacron dan mesh logam serta penukar kalor tambahan yang dialiri air dalam rangka meningkatkan kinerja sistem.
Porphyry Body and Geological Structure Identification as Control of Low Sulphidation Epithermal System in Sangon, Kokap Sub-District, Kulonprogo Regency, Special Region of Yogyakarta, Indonesia Akmal Dzulfikar; Anang Sahroni; Bachruddin Ashari; Diah Ayu R; Erwina Sofia Br Sembiring; Fadia Zharfa Ash S; Lilik Maryanto; Lutfi Afgani; M Nurrahman; M Rahmat C; Muslihul Zaim; Novita Triswi H; Riando Elang D; Siti Fadzillah; Ulya Habiburrahman
Jurnal Fisika Indonesia Vol 22, No 3 (2018)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfi.v22i3.55461

Abstract

There is gravity measurement that is supported by magnetic measurement in Sangon to identify porphyry body and geological structure as low sulfidation epithermal system control. The survey area is 6.4 x 5.6 km for gravity method and 2.5 x 1.2 km for the magnetic method. The value of gravity anomaly after flat plane reduction processing is 122-142 mGal which is positive anomaly located in the north-eastern area and negative anomaly to 82- 102 mGal located in the south-western area. Whereas the magnetic residual anomaly is - 800-1300nT.Conducted 2.5 D modelling of gravity method that is based on local anomaly slice. The result of 2.5D modelling show that an intrusion body interpreted as Dacite intrusion as host rock which plays a role as a heat source of the mineralization system. The density of Dacite is 2.70 gr/cm3. The result of gravity modelling has a correlation with the result of magnetic modelling. Based on magnetic modelling, the intrusion body is located in the south-west.
Mineral Prospect Identification Using Inducedpolarization And Very Low Frequency-EM Methods At Sangon, Kalirejo Village, Kokap Sub-District, Kulonprogo Regency, Special Region Of Yogyakarta, Indonesia Adera Nurul; Arga Kunang; Arief Khoiruddin; arif fikri; Benedicta Nathania; Dobrak Tirani; Enrico Diofano; Haryo Satrio; Hesti Nilamhapsari; Ihsan Median; Indah Sasmita; Ivona Annisa; Jum Satriani; Laila A; Mariana Kambey; M Syahdan; Oktavianus Eko; Rahmat Hidayat; Ramdhani Ramdhani; Satrio P; Siti Suci; Zeni A; Zukhruf Delva
Jurnal Fisika Indonesia Vol 22, No 3 (2018)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfi.v22i3.55647

Abstract

A research of induced polarization and very low frequency method was carried out at Sangon Village, Kulonprogo to identify mineralization zone. The result of these methods were able to be used to support each other. Mineralization zone is shown by high resistivity and high hargeability area of induced polarization method, and is also shown by high electric current density area of very low frequency method. Interpretation of resistivity and chargeability model shows that mineralization zone is mostly located at the depth below 10 m from surface. On the other hand, interpretation of electric current density models at depth 10 m and 20 m show that mineralization zone is not well distributed respect to alteration zone, which is the character of low sulfidation epithermal type, mostly at north-south direction.
Integrated Analysis of Microtremor Horizontal to Vertical Spectral Ratio, Surface Waves Dispersion Curve, and Seismic Refraction Tomography to Estimate Weathered Layer Thickness and Seismic Vulnerability: Case Study Kalirejo Village, Kokap Sub-District, Kulon Progo Regency Anna Wahyu; Ade Filla Intan; Arddhiles Adhitama; Febrian Nur Fadhli; Ferda Elita Putri; Gunarta Sutantio; Henest Paskah; Intan Permata Sari; Kirana Ndaru Pertiwi; Luthfan Kin Gumandar; Milya Dwi Lestari; Naufal Abdila; Neneng Alif Karlina; Nita Utami; Patria Ufaira Aprina; Reymon Arga Medika
Jurnal Fisika Indonesia Vol 22, No 3 (2018)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfi.v22i3.55648

Abstract

Subduction of Indo-Australia plate to Eurasia plate and locally active fault nearby Kulon Progo play as major source for earthquake events. After effect due to earthquake has different level of damage which depend on the magnitude and site characteristics. The horizontal-to-vertical spectral ratio (HVSR) passive seismic method is being used drastically to help in mapping the level of site vulnerability to earthquake event. HVSR analysis results help us acquire some physical values including weathered layer thickness where Vs 30 reference came from surface waves dispersion curve analysis of the MASW method as it is used as a parameter in calculating thickness value. Seismic refraction tomography is used to create subsurface model thus we may see the extent of underlying layer and its implication to earthquake event.Data measurements distribution are scattered in Kalirejo Village with the total of 63 passive seismic data, 33 MASW data, and 7 lines of seismic refraction acquisition. Some data show inadequate quality to be taken into further processing step, so data sorting activity should be carefully done. As a result, 21 of 63 passive seismic data are considered adequate to represent site physical values. Dominant frequency values ranging from 2 to 20 Hz, amplification factor varies between 1.5-12.5, and seismic vulnerability indices varies between 0.3-20. Surface waves dispersion curve inversion results are Vs 30 values ranging from 350 m/s to 980 m/s and seismic refraction tomography model shows Vp model with velocity values ranging from 0.2 to 3.2 km/s.

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