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All Journal International Journal of Renewable Energy Development BERKALA FISIKA SAINS DAN MATEMATIKA Jurnal Ilmu Lingkungan Jurnal Perikanan dan Kelautan YOUNGSTER PHYSICS JOURNAL Jurnal Teknik Sipil Scientific Journal of Informatics Jurnal Manajemen Pendidikan (JMP) International Journal of Artificial Intelligence Research Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis Solidaritas Jurnal Akuatiklestari Aquasains : Jurnal Ilmu Perikanan dan Sumberdaya Perairan e-Jurnal Rekayasa dan Teknologi Budidaya Perairan Journal of Physics and Its Applications JSiI (Jurnal Sistem Informasi) Jurnal Pengembangan Riset dan Observasi Teknik Informatika Dialogia: Jurnal Studi Islam dan Sosial Jurnal Sains Teknologi Akuakultur Journal of Machine Learning and Soft Computing Journal of Tropical Marine Science Jurnal Fisika Indonesia Jurnal Ners Jurnal Abdi Insani Jurnal Ilmiah Abdi Mas TPB Unram Jurnal Kesehatan Tambusai Arwana: Jurnal Ilmiah Program Studi Perairan JOURNAL LA MEDIHEALTICO Journal of Islamic Philanthropy and Disaster Journal of Community Development and Disaster Management Journal of Communication Studies Jurnal Al-Qayyimah Academic Physiotherapy Conference Proceeding Mandala of Health : A Scientific Journal Jurnal Keperawatan Jurnal Riset Rumpun Ilmu Sosial, Politik dan Humaniora (JURRISH) Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Social Science Academic Journal of Community Service and Society Empowerment Proceeding of International Conference of Islamic Education Global Forest Journal Jurnal Pengabdian Fakultas Pertanian Universitas Lampung Oftalmologi: Jurnal Kesehatan Mata Indonesia Economic, Accounting Scientific Journal (CASH) Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan Journal of Community Services and Engagement: Voice of Community (VOC) Jurnal Perikanan dan Kelautan Jurnal Perikanan JLTLL
Agus Setyawan
Department Of Physics, Faculty Of Science And Mathematics, Diponegoro University, Semarang
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Journal : YOUNGSTER PHYSICS JOURNAL

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INTERPRETASI STRUKTUR BAWAH PERMUKAAN DATA GAYABERAT MENGGUNAKAN ALGORITMA JARINGAN SARAF TIRUAN STUDI KASUS DAERAH PANAS BUMI UNGARAN, JAWA TENGAH Ratih Rundri Utami; Agus Setyawan; Rahmat Gernowo
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Artificial neural networks have been used in an application of geophysical such as seismic, electromagnetic, restivity, and gravity. In this study, artificial neural network system used is the method of propagation of gravity to produce anomalies corresponding to the desired anomalies on the geothermal area of Mount Ungaran, Central Java. In the training process to produce the best weight with 4 hidden layer with a correlation coefficient of 0.99 and the testing process using the results of the best training with a correlation coefficient of 0.97 and a yield value that resembles Bouguer anomaly in the research area., so it can be seen under the surface of the structure with the results of the best network where there is a high density value of 2.70 to 2.80 g/cm3 in lava basalt as geothermal systems Mount Ungaran. Density 2.40 to 2.80 g/cm3 Low contained in the surface area of Mount Ungaran with the majority of sedimentary rocks of andesitic pyroclastic products of Mount Ungaran Young.
VERTICAL TRANSVERS ISOTROPY (VTI) PRE STACK DEPTH MIGRATION ANISOTROPI UNTUK PENCITRAAN STRUKTUR BAWAH PERMUKAAN YANG LEBIH AKURAT Ibnu Rasid; Udi Harmoko; Agus Setyawan; Teguh Suroso
Youngster Physics Journal Vol 1, No 1 (2012): Youngster Physics Journal Oktober 2012
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Anisotropic Pre Stack Depth Migration method has been carried out for 2D seismic reflection data on Line “IR” The simplest form of anisotropic media (VTI (Vertical Transverse Isotropy) was used. Theoretically, this form requires two parameters to describe the media, those are δ (delta) and ε (epsilon). δ is an anisotropy parameter that describe velocity variation near to vertical while ε is an anisotropy parameter that describe velocity variation near to horizontal. The anisotropic Pre Stack Depth Migration produce a section which has corrected build up image and has change to be the true of reflector in 67 m of depth. Base on well and seismic data calculation process, an anisotropic parameter is in the range of 0.050-0.058. Generally, Anisotropy Pre Stack Depth Migration method gave better result than isotropy Pre Stack Depth Migration. Key Word: Anisotropy, Pre Stack Depth Migration, VTI, delta, epsilon
APLIKASI METODE TRANSFORMASI RADON UNTUK ATENUASI MULTIPEL PADA PENGOLAHAN DATA SEISMIK 2D LAUT DI PERARIRAN “X” Nona Dili Maricci; Agus Setyawan
Youngster Physics Journal Vol 4, No 4 (2015): Youngster Physics Journal Oktober 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Multipel in marine seismic data is the noise formed due to the high impedance contrast at he boundary between layer. Multipel interfers the data processing that will also affect the interpretation of subsurface image. Radon transformation is one of the methods to attenuate the multipel. Radon transformation method is to transform the data of the domain time-offset (t-x) into a domain intercept time- ray parameter (τ-p). Primary wave and multipel will be separated with muting desain in domain (τ-p). At the end of this study to compare the result stacking preprocessing and stacking Radon. The result of the research shows that multipel in time 190-200 ms are attenuated.
Pemodelan 2 dimensi data magnetotellurik berdasarkan analisis phase tensor dalam penentuan geoelectrical strike dan dimensionalitas data di Lapangan Panas Bumi “X” Fitra Ramdhani; Agus Setyawan; Imam B. Raharjo; Lendriadi A.
Youngster Physics Journal Vol 6, No 3 (2017): Youngster Physics Journal Juli 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Magnetotelluric research has been done on the geothermal field "X" aims to indentify dimensionality of data, direction of geoelectrical strike and map resistivity distribution of subsurface structure. Before modelling 2 dimensional subsurface structure, MT data must go through stage quality control data, analysis of dimensionalitas data and analysis direction of geoelectrical strike to get 2 dimensional structure model of the subsurface are accurate. The stages of quality control data was done by eliminate the points in the curve of resistivity and phase which out of the trend that is considered as noise. Dimensionality data analysis use curve of three parameters invariant phase tensor i.e phi maximum, phi minimum and beta. Analysis of  the geolectrical strike direction was done by showing a reduction of angle  and  in rose diagram. Overall the analysis phase tensor was performed on 60 tensor magnetotelluric data in the geothermal field "X". Modeling subsurface resistivity structure use the scheme forward modelling and inverse modelling. The results of selection cross power showed that magnetotelluric data are dominated by good quality data. The results of dimensionality data analysis indicates that the dimensionality data of MT data in the geothermal field "X" consists of structure with dimensionality 1D, 2D and 3D structure. Structure with dimensionality 1D is in  frequency range 320 – 44 Hz, Structure with dimensionality 2D is in frequency range 44 – 0,3 Hz and structure with dimensionality 3D is in  frequency range 0.3 – 0.004 Hz in the geothermal field "X". Rose diagram in frequency range 320 – 0.3 Hz was combined with direction of regional structure in geothermal field "X" indicates that the direction of geoelectrical strike is N330oE. 2 dimensional modeling has been done in the frequency range 320 – 0,3 Hz. Data is rotated in the direction of geoelectrical strike before the modeling stage. 2 dimensional model consisting of five line perpendicular to the direction of the structure in the field. 2 dimensional model  show caprock layer has s resistivity range 5-20 Ohm-m that thicken to the Northwest while the reservoir layer has a resistivity range 80-120 Ohm-m are thinned to the Northwest. The heat source has a resistivity range 400-500 Ohm-m and located at depth  3.5 km below the surface.Keywords: Dimensionality, geoelectrical strike, distortion, model 2 dimensi
APLIKASI METODE BIDIMENSIONAL EMPERICAL MODE DECOMPOSITION (BEMD) UNTUK DATA GAYABERAT GUNUNG UNGARAN, INDONESIA Fuad Tarmidzi; Agus Setyawan
Youngster Physics Journal Vol 2, No 4 (2013): Youngster Physics Journal Oktober 2013
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Gravity method processing will obtained gravity anomaly which is combination between regional and local gravity anomalies that need to separate it for interpretation. Upward continuation method commonly used to separates regional and local gravity anomalies. Recently, the separation of these anomalies can be done with Bidimensional Empirical Mode Decomposition (BEMD) method which its calculation based on gravity anomaly profile. BEMD will separates gravity anomali profile based on its frequency that some sub-sinyal will obtained from it. On this research, BEMD method has been used to separate gravity anomaly of Ungaran Mountain dan the result of it compared with the result from Upward Continuation method. 5 Intrinsic Mode Function (IMF) and 1 residual were obtained from BEMD method, wherein IMF3 showed pattern of regional gravity anomali and IMF1 showed pattern of local gravity anomaly. With using these methods, obtained patterns were similar. Keywords: BEMD, Gravity anomalies, Ungaran, IMF
Monitoring perubahan massa area lumpur LAPINDO dengan metode gayaberat antar waktu: Stusi kasus Porong Jawa Timur Indah Asmoro Wulan; Agus Setyawan
Youngster Physics Journal Vol 6, No 4 (2017): Youngster Physics Journal Oktober 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Sidoarjo mud occurs because of the emergence of hot mud and mudflow. Microgravity method used to monitor the mud, indicate that height change and know subsurface structure. Microgravity analysis based on microgravity data used to find out the value of microgravity changes. The result of microgravity value change indicate that the positive value is the addition of subsurface mass and land subsidence while the negative value is the reduction of subsurface mass. Three dimensional modeling based on gravity data were performed to find out the subsurface structure in the study area. The complete Bouguer anomaly is separated using an upward continuation to obtain regional and residual anomalies. 3D modeling were performed on complete Bouguer anomalies. 3D modeling results indicate of sedimentary rocks, sand, gravel, clay and indicate.Keywords: land subsidence, mudflow, microgravity method, 3D modelling
IDENTIFIKASI POTENSI AKUIFER BERDASARKAN METODE GEOLISTRIK TAHANAN JENIS PADA DAERAH KRISIS AIR BERSIH DI KOTA SEMARANG Octaviani Sarmauli; Agus Setyawan; Dwiyanto JS
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Semarang city has a unique geological rock formations constituent layers in each region. The uniqueness of the identification of the presence of roundwater show that is different. Groundwater reserves in fulfilling the water requipments decreasing due to population growth, industrial growth and infrastructure development. This study aims to identify potential of aquifer to know the type of lithology layers, thickness and depth. The method used in this research is a geoelectric resistivity Schlumberger configurations with measurement points are Cangkiran, Cepoko, Ngadirgo, Gunungpati, Pakintelan, Pesantren, Tandang and Rowosari. The results suggest the potential for aquifer interpretations are based on the value of resistivity 19,6 Ωm – 92,5 Ωm with lithology as a sandstone. The aquifer grouped into the deep aquifer and the shallow aquifer. Deep aquifer has range of depth between 50-100 meters on point CA-3, CA-4, CE-1, CE-2, NG-2 and TA-1. Shallow aquifer has range of depth between 10-4 meters on point of GP, NG1, PA, PE and RO.
PENENTUAN PREKURSOR GEMPA BUMI MENGGUNAKAN DATA MAGNETOTELLURIK DI DAERAH PELABUHAN RATU Noviana Fransiska; Agus Setyawan; Boko Nurdiyanto
Youngster Physics Journal Vol 2, No 3 (2013): Youngster Physics Journal Juli 2013
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The research has been done by using data of electromagnetic parameter base on the result of magnetotelluric observation which  located in geophysics observation Pelabuhan Ratu. Research of earthquake precursor in order to find out the characteristic of electromagnetic signal by applying spectral analysis ratio method on Ultra Low Frequency (ULF).             The data is electromagnetic secondary data from observation result of magnetotelluric and data of Dst index year 2011.  The data magnetotelluric is consist of electric component and magneict component. The filtering data is executed by using wavelet method. Result of  filtering  will be shown as graph ratio of magnetic field and electric field spectral intensity in a time domain.            According to the analysis by using spectral density analysis can be found out that the characteristic of ULF signal on frequency 0.01 Hz before earthquake show that there is an increase of value for magnetic polarization and occurred decrease of EM wave impedance value. From the analysis result show an appearance of magnetic polarization anomaly which expected as earthquake precursor and can be seen around 10 – 19 days before the occurrence of earthquake while for the value of EM wave impedance can be seen around 23 – 40 days before earthquake.Keywords : Precursor, Ultra-Low-Frequency, Spectral Density Ratio Analysis, Pelabuhan Ratu
IDENTIFIKASI LETAK DAN JENIS SESAR BERDASARKAN METODE GAYABERAT SECOND VERTICAL GRADIENT STUDI KASUS SESAR LEMBANG, KOTA BANDUNG, JAWA BARAT M Wildan Firdaus; Agus Setyawan; Mahmud Yusuf
Youngster Physics Journal Vol 5, No 1 (2016): Youngster Physics Journal Januari 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Gravity measurement has been done in Lembang area, Bandung on 2014. Measurement were perform with relative gravity (Scintrex CG-5) with 28 measuring point around Lembang fault. The aim of this research is to observe gravity response Bouguer anomali toward Lembang fault structure along 22 kilometers from eastern to west. In this research, we use second vertical gradient to known about the location and kind of fault structure. As the result from this research shown the Bouguer anomali has a distribution value around -2 mGal – 52 mGal, this result indicated that Lembang Fault are located between high and low Bouguer anomali. While the result from second vertical gradient indicated that Lembang Fault is a normal fault.Keywords: gravity, Bouguer, SVG, fault, Lembang
IDENTIFIKASI STRUKTUR RESISTIVITAS DAERAH GEOTHERMAL “T” BERDASARKAN HASIL PEMODELAN 2D DATAMAGNETOTELURIK Nur Rachmaningtias; Agus Setyawan; Imam Baru Raharjo
Youngster Physics Journal Vol 3, No 2 (2014): Youngster Physics Journal April 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Resistivity structure identification of magnetotelluric data was made at geothermal area“T”, located in southern Indonesia. This process is based on the modeling result of 2-dimention magnetotelluric data. The modeling result of magnetotelluric data shows relativity structure dissemination on a scale of 0-10 ohm.m in a thickness of 1 km (clay cap), on a scale of 10-100 ohm.m in a depth of 1-2 km (reservoir zone), and on a scale of 100-1000 ohm.m in a depth of 2-3 km (heat source zone). The result of relativity structure dissemination can be used to delineate an area with geothermal prospect around 12 km2. Keywords: magnetotelluric, 2 dimension modeling, structure resistivity
Co-Authors A. Suhandi A.A. Ketut Agung Cahyawan W Achmad Samsudin Achmad Supriyadi, Achmad Adi Nugroho Agnis Triahadin Agnis Triahadini, Agnis Agung Prasetyo Agus Subagio Agus Susilo Agustina, Cynthia Ahwy Oktradiksa Akbar, Shofya Alfina, Ria Aliyatarrafiah Aliyatarrafiah Althafunnisa, Namyra Aisha Aman Damai, Abdullah Anik Fitrochaton Chasanah Ansori, Teguh Arif, Mas Achmad Syamsul Arlanda, Revilarita Asri Nurdiana, Asri Astuti, Andriani Mei Azis, Latif Saiful Azizah Azizah Azizi, Sandi Bambang Mujihardi Baroek, Marino Christiano Berta Putri Boko Nurdiyanto Brandan Tito Ramadhan Choirul Wahid, Imam Mustofa D Febrianty Dadan Dani Wardhana Damai, A Aman Dave Emmanuel Haning Dewi Mariyaningsih Dhana Hastuti Dimas Sidiq Baskoro Dita Aprilina Djalal Er Riyanto Dwi Purwantoro Sasongko Dwi Puspitasari Dwiki, Elba Dwiyanto JS Dzuelqarnain, Muhammad Essa eko efendi Elisdiana, Yeni Endriasmoro M Siagaan Esti Harpeni F M Arif Faizal Ahmad Fajar Waskito Fajrin, Fajrin fidhoh, kha Fidyandini, Hilma Putri Firdausi, Hilma Nahwa Fithria I D, Ni'matul Fitra Ramdhani Fitra Ramdhani Florentina Yuni Arini, Florentina Yuni Frysca Putti Muviana Fuad Tarmidzi Galang Virgiawan Ganap Y. Febrika Ganap Yuliana Febrika Ghufron Abdullah Gunawan, Riyan Habib, Farid Alif Harri Yudianto Hauzan, Noor Azmi Fachri Hauzan, Noor Azmi Fachri Hay's, Riyan Naufal Herbianto, Sheren Aurellya Hidayat, Muhammad Adil Hidayati, Ina Hilmi, Haidar Hirafiany Daruartati I Gusti Ngurah Antaryama I Nyoman Sujana Ibnu Rasid Ida Hayu Dwimawanti Ilham Nurdien Imam B. Raharjo Imam Baru Raharjo Imam Baru Raharjo Indah Asmoro Wulan Indra Gumay Febryano Irawan, Ady Isa Akhlis Isnain Gunadi Istikomah Istikomah Istiqomah Ari Kusuma Ita purnamasari, Ita Itasari, Andri Astuti Jatmiko Endro Suseno Jatmiko Endro Suseno Juliasih, Ni Luh Gede Ratna Kanthi Pamungkas Sari Kasanah, Nur Khafidhoh Khafidhoh, Khafidhoh Khairunissa, Hatifa Khasana, Devi Ardiyati Kholidin, Edy Barkat Kusno Adi Sambowo Kusumaningrum, Rahma Puspita Lendriadi A. Lestari, Kiki Indah Lestari, Sepnina Like Limin Santoso Linirin Widyastuti, Endang Listia, Octa Lutfiani, Ulfah M Wildan Firdaus Maharani, Ni Putu Diva Mahestri, Laras Mahmud Yusuf Malau, Victor Pandpotan Maya Riantini, Maya Maya Sekar Wangi Moch. Abdul Mukid Mohammed I. D. Matar, Mohammed Mualimin Mualimin Mualimin Mualimin Muchammad A Rofik Muchlis, Ibnu Mufita, Halimah Muhammad Irham Nurwidiyanto Muhammad Mualimin Muhammad Nur Muhammad Nur Handoyo Munti Sarida Murtiningtias Diah Ayu Martha Dewi Mustafid Mustafid Mutiatussholikah, Dita Muyasaroh, Evi Nafiisah, Nafiisah Naufal, Adnan Faris Ningsih, Setia Nisa Az Zuhdy, Afifah Nona Dili Maricci Noor Alis Setiyadi Noor, Huriyatul Fitriyah Noviana Fransiska Nuning Nurcahyani Nur Rachmaningtias Nurcahyo, Mugi Nurhadiyastuti, Ameilia Nuriyana Muthia Sani Nursamsiah Nursamsiah Nurul Khasanah, Nurul Nur`Ani Okta Trilia Octaviani Sarmauli Oki Hedriana Oky Irawan Sugiri Ophi Thio Rendy Parabi, Achmad Reza Parbuntian Sinaga Pitojo Budiono Prabowo, Muhammad Nur Priyo, Priyo Putra, Hisbicus Dwi Surya Qadar Hasani R. M. Tofan Sastranegara Rahayu, Wiji Rahaz, Muhammad Faiz Thoyib Rahmasari, Ikrima Rahmat Gernowo Ramadhan, Irvan Rara Diantari Ratih Rundri Utami Ratna Dewi Winesthi Redemtus Heru Tjahjana Rina Dwi Indriana Rina Hesti Utami Ririn Sulpiani Sakti, Doni Bilga Komara Sari, Azzahra Indah Satriyo Adhy Sela Ade Otaviana Setiawan, Aqshal Dwi Siti Fathonah Siti Hudaidah Siti Rohimah Sitompul, Hotlan Albert Adventus Subandoro, Agus Sudarno Sudarno Sugeng Widada Sugiharto, Sh Sumino, Sumino Supono Supono Supriyadi - Supriyadi - Susanti, Oktora Susanti, Susanto, Gregorius Nugroho Sutrisno, Ade TATI NURHAYATI Teguh Satya Bhakti Teguh Suroso Thessa Putri Aulia Tiara Qonita, Azhra Tiara Qonita Titik Haryati Tugiyono Tugiyono Udi Harmoko Wahyono, Catur Wahyu Eko Sulistiono Wardiyanto - Widiarso Dian Agus Widiastuti, Endang Linirin Winaldi, Iman Wisnu Agung Permadi Wiyatanto, M Toto Yasluh, Muhammad Sholukha Yatti Pratyas Katrinavia Yatti Pratyas Katrinavia Yayan Yuliananto Yayan Yuliananto Yeni Indriyani Yoga Aribowo Yudha T Adiputra Yudha Trinoegraha Adiputra Yundari, Yundari Yuniarti, Siti Yusup, Maulid Wahid Zainal Abidin Zaini, Syakila Zulfikar Zafeskan Ronapati