Article Per Year (5 Year)
p-Index From 2020 - 2025
0.983
P-Index
This Author published in this journals
All Journal JPMS (Jurnal Pendidikan Matematika dan Sains) International Journal of Science and Engineering (IJSE) Jurnal Teknik ITS Jurnal Sains dan Seni ITS Jurnal Penelitian Fisika dan Aplikasinya (JPFA) IPTEK The Journal of Engineering IPTEK Journal of Science IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Jurnal Neutrino : jurnal fisika dan aplikasinya IJOG : Indonesian Journal on Geoscience Jurnal technoscientia Jurnal Matematika & Sains JFA (Jurnal Fisika dan Aplikasinya) Jurnal Spektra JURNAL TEKNOLOGI TECHNOSCIENTIA Indonesian Journal on Geoscience Indonesian Journal on Geoscience International Journal of Social Service and Research Makara Journal of Science
Irwan Setyowidodo, Bagus Jaya Santosa
Fisika, Institut Teknologi Sepuluh Nopember Surabaya
Arts Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences

Published : 75 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 75 Documents
Search

 4   5   6   7   8 
Identification of Soil Contamination using VLF-EM and Resistivity Methods: A Case Study Rahmatun Inayah; Bagus Jaya Santosa; Dwa Desa Warnana; Firman Syaifuddin; Juan Pandu Gya Nur Rochman; Wien Lestari; Amien Widodo
IPTEK The Journal for Technology and Science Vol 30, No 1 (2019)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (652.116 KB) | DOI: 10.12962/j20882033.v30i1.5004

Abstract

Hazardous waste is a waste with properties which can pollute and damage the environment, human health, and other living things. Lakardowo is a village that is suspected of being contamination by hazardous waste derived from industrial activities. Measurements with the VLF-EM and Resistivity method were used in this study. In addition, ground water level mapping and soil sampling in locations around the industry were conducted for the XRF test. Groundwater mapping results show that groundwater flow lead to the Northeast-South and Southwest of the industrial site. The soil samples that have been tested by XRF show the presence of heavy metals, wherein hazardous wastes generally contain various types of heavy metals that are conductive or have low resistivity values. Quantitative interpretation of VLF-EM data shows the presence of low resistivity anomalies at several measurement sites, which are suspected to have been contaminated with soil by waste. Resistivity data processing results, showing a low resistivity anomaly (≤ 3 Ω.m) located to the north (near an industrial site) and spreading towards the southwest along the measurement path. The result of a combination of quantitative interpretations of both methods, obtained, the direction of anomalous flow of hazardous waste moves southeastward and towards deeper soil coating following the direction of rock coating.
Struktur Kecepatan Gelombang S antara Episenter Gempa Bumi C022801L dan Stasiun Observasi KDAK dan INK melalui Analisis Seismogram Bagus Jaya Santosa
Jurnal Fisika dan Aplikasinya Vol 3, No 1 (2007)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (395.571 KB) | DOI: 10.12962/j24604682.v3i1.964

Abstract

Analisa kuantitatif atas seismogram berupa pengukuran waktu tiba gelombang S pada jarak episentral dekat adalah tidak mudah, karena gelombang S tiba dekat dan tenggelam dalam gelombang Love, sehingga penentuan waktu tiba S menjadi tidak jelas. Dalam penelitian ini struktur kecepatan S diinvestigasi melalui analisa seismogram gempa C022801L dengan seismogram sintetiknya di stasiun KDAK, Alaska dan INK, Kanada. Seismogram terukur dibandingkan terhadap sintetiknya dalam domain waktu dan ketiga komponen ruang secara simultan. Seismogram sintetik dihitung dengan program GEMINI. Input awal untuk menghitung seismogram sintetik adalah model bumi PREMAN dan solusi CMT dari gempa tersebut. Filter low-pass Butterworth dengan frekuensi sudut pada 20 mHz dikenakan pada seismogram observasi dan sintetik. Pengamatan menunjukkan penyimpangan nyata pada waktu tempuh dan waveform beberapa fase gelombang, yaitu gelombang S, gelombang permukaan Love dan Rayleigh dan gelombang ScS. Penelitian ini menunjukkan, bagaimana pekanya waveform terhadap struktur bumi. Penelitian ditujukan untuk menyelesaikan diskrepansi yang dijumpai pada gelombang-gelombang S, Love dan Rayleigh dan ScS, di stasiun observasi KDAK. Untuk mendapatkan pengepasanseismogram diperlukan koreksi atas struktur kecepatan S dalam model bumi, yaitu perubahan ketebalan kulit bumi. model kecepatan h di upper mantle meliputi gradient kecepatan h dan besar koesien-koesien order nol untuk h dan v atas diskrepansi pada gelombang permukaan Love dan Rayleigh. Koreksi atas penyimpangan pada gelombang S dilakukan pada sistim perlapisan bumi dari upper mantle hingga kedalaman 630 km, sedangkan untuk fase gelombang ScS koreksi dilaksanakan hingga kedalaman CMB (2890 km). Fittingseismogram diperoleh pada waveform berbagai fase gelombang, yaitu gelombang S, ScS dan gelombang permukaan Love dan Rayleigh, baik pada waktu tempuh osilasi utama dan jumlah osilasi, khususnya pada gelombangLove. Hasil ini menunjukkan bahwa anisotropi terjadi tidak hanya di upper mantle tetapi hingga lapisan bumiyang lebih dalam, hingga CMB.
Model Struktur 1-D Kecepatan Gelombang P di daerah Minahasa Juan Pandu Gya Nur Rochman; Bagus Jaya Santosa; Febry Rokhman Firdaus
Jurnal Fisika dan Aplikasinya Vol 8, No 2 (2012)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (459.184 KB) | DOI: 10.12962/j24604682.v8i2.866

Abstract

Daerah Minahasa merupakan salah satu zona tektonik aktif di Indonesia karena memiliki zona sesar kompleks sebagai akibat pertemuan batas lempeng di barat laut pulau Sulawesi, sehingga sering terjadi gempa tektonik dangkal hingga sedang. Telah dilakukan studi spesifik mengenai struktur kecepatan gelombang gempa 1-D dan letak hypocenters yang lebih akurat di daerah Minahasa. Data yang digunakan sebanyak 8 event gempa di area sekitar Minahasa (0,300-4,300 LU dan 121,0 -121,7 BT) yang terjadi pada bulan Maret - Desember 2011yang terekam di 8 stasiun seismograf setempat (KMSI, MRSI, MPSI, APSI, GLMI, LBMI, LUWI, dan SANI). Model struktur 1-D didapatkan dengan menganalisis waktu tempuh gelombang P dari data gempa lokal, yaitu dilakukan dengan picking menggunakan WinQuake. Data waktu tempuh gelombang P dilakukan inversi menggunakan software VELEST 33 sehingga didapatkan model struktur 1-D, kecepatan gelombang P dan relokasi gempa. Hasil pengelohan data didapatkan model struktur 1-D kecepatan gelombang P di daerah Minahasa berkisar antara (2,95 - 9,07) km/s pada kedalaman 36 km dengan RMS residual = 3,7 dan didapatkan hypocentersbaru yang lebih akurat.
Ketebalan kulit bumi dan struktur kecepatan antara hiposenter gempa M012601A dan stasiun AAK Bagus Jaya Santosa
Jurnal Fisika dan Aplikasinya Vol 1, No 2 (2005)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (199.206 KB) | DOI: 10.12962/j24604682.v1i2.1007

Abstract

Gempa M012601A terletak di India Utara dan stasiun AAK di Kirgistan, topografi antara kedua titik berbentuk pegunungan, yaitu Himalaya. Penelitian ini menginvestigasi struktur kecepatan di daerah kompleks pegunungan tersebut melalui fitting seismogram. Seismogram observasi dibandingkan dengan seismogram sintetikdalam domain waktu dan ke tiga komponen Kartesian secara simultan. Seismogram sintetik dihitung dengan program GEMINI, dimana input awalnya adalah model bumi global IASPEI91 dan PREMAN. Selain itu pada kedua seismogram dikenakan low-pass filter dengan frekuensi corner pada 20 mHz. Analisa seismogram menunjukkan penyimpangan yang sangat kuat pada pengamatan atas waktu tiba, jumlah osilasi dan tinggi amplitudo, pada gelombang permukaan Love dan Rayleigh dan gelombang ruang S dan P. Untuk menyelesaikan simpangan yang dijumpai diperlukan koreksi atas struktur bumi. Fitting seismogram diperoleh dengan baik pada waveform fase gelombang, baik waktu tempuh osilasi utama dan jumlah osilasi. Hasil riset ini menunjukkan, bahwa daerah pegunungan Himalaya mempunyai ketebalan kulit bumi sebesar 42 km, hasil ini diperoleh melalui fitting pada Love waveform.
Local Waveforms Analysis to Estimate the Fault Plane of May 2008 Sumatra Earthquakes Bagus Jaya Santosa; Bintoro Anang Subagyo
Jurnal Fisika dan Aplikasinya Vol 13, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1717.503 KB) | DOI: 10.12962/j24604682.v13i2.2747

Abstract

Five earthquakes source parameters in Sumatra have been estimated that occurred on May 3rd, 13th , 18-20th 2008, which earthquakes magnitude was over 5.4 Mw. To determine the earthquakes source parameters, we used three components local waveform. The seismogram data are inverted to achieve the earthquake source parameters. To investigate the depths of earthquakes, the determination used the highest value of variance reduction of waveform analysis. To identify the fault plane of the earthquakes, the H-C method is used. The research calculates also the length and width of the Fault planes.
Pengaruh Model Kulit Bumi terhadap Gelombang ScS dan ScS-ScS Bagus Jaya Santosa
Jurnal Fisika dan Aplikasinya Vol 5, No 1 (2009)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (100.478 KB) | DOI: 10.12962/j24604682.v5i1.928

Abstract

Dalam penelitian ini telah diperbandingkan seismogram observasi dengan seismogram sintetik dari sebuah gempa dalam komponen ruang 3 dimensi. Data seismogram berasal dari Teluk Kamschatka di Kep. Kuril yang terjadi pada tanggal 5 Desember 1997, dan direkam oleh stasiun pengamat yang terletak di BILL, Rusia dan MAJO, Jepang. Seismogram sintetik dihitung dengan Program GEMINI, yang mana inputnya berupa sebuah model bumi elastik, yang simetri radial dan isotrop tranversal, dan solusi CMT dari gempa tersebut, yang merupakan penggambaran atas proses dinamika pada hiposenter gempa serta kedudukan-kedudukan stasiun observasi. Model bumi diambil dari dua model yang paling sering diacu oleh para peneliti, yaitu IASPEI91 dan PREM. Data seismogram riil dan sintetik akan diperbandingkan dalam kawasan waktu pada ketiga komponen pergerakan tanah, setelah sebelumnya dikenakan filter lolos rendah pada 20 mHz. Pada perbandingan seismogram dijumpai diskrepansi yang jelas pada amplitudo dan waktu tiba milik fase gelombang ScS dan ScS-ScS. Ini menunjukkan, bahwa struktur inti bumi dan lapisan mantel bawah belum diketahui secara detil, karena pengaruh dari ketebalan kulit bumi yang sangat jelas.
Characterization of Soil Profile Using Dispersion Curve Analysis Hisbulloh Huda; Bagus Jaya Santosa
International Journal of Social Service and Research Vol. 2 No. 2 (2022): International Journal of Social Service and Research (IJSSR)
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/ijssr.v2i2.80

Abstract

Research has been carried out on the seismic refraction exploration method by utilizing piles on the construction project of the Geomatics Campus II FTSP ITS Surabaya as a source of vibration. Rayleigh waves are one type of surface wave that is good for identifying layered structures near the earth's surface because 67% of the energy The total amount released by the seismic wave source is transmitted in the form of Rayleigh waves. In the layered medium, Rayleigh waves have dispersive properties, speed as a function of frequency. This property can be used to determine the structure of the earth's layers based on the shear wave velocity (Vs) with depth (h). The inversion process is carried out to match the measurement dispersion curve and the model. The result of the inversion process is the shear wave velocity (Vs) function of depth. This research is expected to identify and characterize the soil profile at the research site. On the track, there are three layers indicated as clay layers, in the first layer 0-6 meters with an average speed of 250 m/s, the second layer 6-19 meters with an average speed of 971 m/s, and the third layer 19-57 meters with an average speed of 1564 m/s
Earthquakes Sources Parameter Estimation of 20080917 and 20081114 Near Semangko Fault, Sumatra Using Three Components of Local Waveform Recorded by IA Network Station Santosa, Bagus Jaya; Madlazim, Madlazim
Makara Journal of Science Vol. 16, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The 17/09/2008 22:04:80 UTC and 14/11/2008 00:27:31.70 earthquakes near Semangko fault were analyzed to identify the fault planes. The two events were relocated to assess physical insight against the hypocenter uncertainty. The data used to determine source parameters of both earthquakes was three components of local waveform recorded by Geofon broadband IA network stations, (MDSI, LWLI, BLSI and RBSI) for the event of 17/09/2008 and (MDSI, LWLI, BLSI and KSI) for the event of 14/11/2008. Distance from the epicenter to all station was less than 5°. Moment tensor solution of two events was simultaneously analyzed by determination of the centroid position. Simultaneous analysis covered hypocenter position, centroid position and nodal planes of two events indicated Semangko fault planes. Considering that the Semangko fault zone is a high seismicity area, the identification of the seismic fault is important for the seismic hazard investigation in the region.
STRUKTUR KECEPATAN GELOMBANG S DI BAWAH INDONESIA MELALUI ANALISIS SEISMOGRAM GEMPA-GEMPA BUMI DI SEKITAR INDONESIA PADA STASIUN OBSERVASI UGM Santosa, Bagus Jaya
Makara Journal of Science Vol. 12, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Seismogram Analysis of Earthquakes Around Indonesia In UGM Observational Station: S Velocity Structure. The seismogram comparison between the measured and synthetics seismogram has been carried out in observation station of UGM, where the seismograms are excited by earthquakes that occurred at North Sumatra, Sumbawa, Sunda Strait, around North Celebes and PNG. The ray paths from earthquake's hypocenter to UGM give opportunity to understand the earth structure alongside the front area of subduction zone. The calculation of synthetic seismogram needs input in the form of earth model, the Centroid Moment Tensor (CMT) solution of the earthquake and location of observation station, as well as the relevant date file response of the observation station. Waveform comparison and fitting at surface wave indicate that speed's anomalies in the lithosphere have negative character in front area of subducted zone, but become positive for northern area of subduction zone. By paying attention to waveform of Love surface wave, it is obtained, that this waveform are sensitive to the change of earth crust thickness, while Rayleigh waveform is not sensitive. Heterogeneity is not only occurred in the lithosphere, but also in deeper earth layers, until Core Mantle Boundary (CMB). Different corrections are needed to make the fitting at S secondary wave, but also at depth wave and its repetitions. The result of this research shows that the research area, which is located in the front of subduction zone has anomalies at S speed of at deeper earth layers which than the lithosphere. The earth structure as the result of this research differs from the other seismological results, where they used the methods, which are based on inversion of arrival time data of body wave and dispersion analysis on surface wave.
STRUKTUR KECEPATAN GELOMBANG S DI BAWAH INDONESIA MELALUI ANALISIS SEISMOGRAM GEMPA-GEMPA BUMI DI SEKITAR INDONESIA PADA STASIUN OBSERVASI UGM Santosa, Bagus Jaya
Makara Journal of Science Vol. 11, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Seismogram Analysis of Earthquakes Around Indonesia In UGM Observational Station: S Velocity Structure. The seismogram comparison between the measured and synthetics seismogram has been carried out in observation station of UGM, where the seismograms are excited by earthquakes that occurred at North Sumatra, Sumbawa, Sunda Strait, around North Celebes and PNG. The ray paths from earthquake's hypocenter to UGM give opportunity to understand the earth structure alongside the front area of subduction zone. The calculation of synthetic seismogram needs input in the form of earth model, the Centroid Moment Tensor (CMT) solution of the earthquake and location of observation station, as well as the relevant date file response of the observation station. Waveform comparison and fitting at surface wave indicate that speed's anomalies in the lithosphere have negative character in front area of subducted zone, but become positive for northern area of subduction zone. By paying attention to waveform of Love surface wave, it is obtained, that this waveform are sensitive to the change of earth crust thickness, while Rayleigh waveform is not sensitive. Heterogeneity is not only occurred in the lithosphere, but also in deeper earth layers, until Core Mantle Boundary (CMB). Different corrections are needed to make the fitting at S secondary wave, but also at depth wave and its repetitions. The result of this research shows that the research area, which is located in the front of subduction zone has anomalies at S speed of at deeper earth layers which than the lithosphere. The earth structure as the result of this research differs from the other seismological results, where they used the methods, which are based on inversion of arrival time data of body wave and dispersion analysis on surface wave.
Co-Authors A. M. Miftahul Huda Abdurahman Wafi Abdurrahman Wafi Ahmat Dafit Hasim Asrori Amien Widodo Arga Nuryanto Arif Haryono Arya Dwi Candra Asmaul Mufida Bahri, Ayi Syaeful Bambang Sunardi Bambang Sunardi Bambang Sunardi Bambang Sunardi Bintoro Anang Subagyo Chi Chi Novianti Deby Nur Sanjaya Dewi Fajriyyatul Maulidah Diah Ningrum, Susi Anggraini Dwa Desa Warnana Dwi Ayu Karlina Eden Lazuardi Eka Jaya Wifayanti Emanuel Destianus Banggut Fathony Akbar Pratikno Febry Rokhman Firdaus Hardiansyah Pratama Hetty Triastuty Hetty Triastuty Hisbulloh Huda Ibrahim Ibrahim Irwansyah Ramadhani Juan Pandu Gya Nur Rochman Kurnia Amelinda Sholikha Latifatul Cholifah Lilis Eka Rachmawati M Madlazim Madlazim Madlazim Mariyanto Mariyanto Mashuri Mashuri Mashuri Mashuri Moh Ikhyaul Ibad Muhammad Iqbal Muhammad Mifta Hasan Muhammad Mifta Hasan Muhammad Mifta Hasan Nisrina Ikbar Rahmawati Nurul Mufidah Pambayun Purbandini Patar Roy Fernandes Nainggolan Pebrian Tunggal Prakosa Pramudiana Pramudiana Rachman, Gazali Radhiyullah Armi Radhiyullah Armi Rahmatun Inayah Rayhan Syauqiya Haf Riski Salim Riski Salim Riski Salim Ryandi Bachrudin Yusuf Samsul Aprillianto Sando Crisiasa Rahmawan Yanuar Satya Hermansyah Putri Sayyidatul Khoiridah Sungkono, B.J. Santosa Syaifuddin, Firman Thariq Guntoro Totok Wijayanto, Totok Uswatun Chasanah Vidya Amalia Harnindra Wafi, Abdurrahman Wahyu Tri Sutrisno Wahyu Tri Sutrisno Wiko Setyonegoro Winda Hastari Yungi Yudiar Rahman