Claim Missing Document
Check
Articles

Found 3 Documents
Search
Journal : Journal of Marine-Earth Science and Technology

APPLICATION OF UPWARD CONTINUATION FILTER FOR GEOMAGNETIC DATA INTERPRETATION IN GONDANG, BOJONEGORO AREA Mustika Bohal, Yolanda; M, Mariyanto; Utama, Widya
Journal of Marine-Earth Science and Technology Vol. 1 No. 1 (2020): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (703.644 KB) | DOI: 10.12962/j27745449.v1i1.152

Abstract

There are several manifestations of hot springs and mud pools in Gondang area, Bojonegoro, East Java, there were. This can be an indication of certain geological conditions. The description of these conditions can be done by measuring the geomagnetic method. A total geomagnetic anomaly has been generated through some geomagnetic values recorded in the region, which has been corrected using IGRF correction and diurnal correction. These steps were done to reduce external influences on the real value of the data. This research will use several variations of values in the Upward Continuation filter and one of them will be chosen to proceed as a model. Upward Continuation Filter is a process of transforming potential field data from a flat plane towards the higher plane. The purpose of this study is to compare the results of contour maps on several variations of the Upward Continuation value, to obtain the results of the separation of residual and regional anomalies using the Upward Continuation method, and to determine the value of the susceptibility distribution of inversion modeling in the Gondang region, Bojonegoro. Based on the results of data processing, it is known that the upward continuation value used is 100mdatum with a magnetic intensity value in the regional anomaly of 106.5 nT to 509.0. While the value of the residual anomaly is -232.1 nT to 159.4 nT. The 3D model was made using this residual anomaly which shows the low susceptibility distribution value in the range of -0.0298 to -0.0135 SI around the manifestation area, whereas the high susceptibility value has a value range of 0.0114 to 0.0466 SI interpreted as rock intrusion. Rock intrusion occurs within the area around the manifestation of mud pools.
CHARACTERISTIC OF SPENT BLEACHING EARTH SUBSTITUTION IN LIMESTONE AS LANDFILL MATERIAL Yulikasari, Andriyan; Meidi YT, Nagari; SA, Yusroni; Utama, Widya
Journal of Marine-Earth Science and Technology Vol. 1 No. 1 (2020): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (336.122 KB) | DOI: 10.12962/j27745449.v1i1.157

Abstract

The substitution SBE in limestone can significantly improve the characteristics of limestone as a landfill material, especially in increasing the CBR hardness value without changing the limestone grain size distribution. This is because SBE acts as filler in the SBE-limestone mixture. The existence of SBE in the mixture does not change the value of the mixture plasticity index, because SBE and limestone are both not plastic. SBE material can be used as substitution material (matrix material) up to 30% by weight in the SBE-limestone mixture. The role of SBE as a filler becomes very important in mixed materials for non-limestone structural material requirements, especially for matrix material sizes from 0.4 to 10 mm or sand to gravel. Of course, more research is needed on the physical and mechanical characteristics of mixed materials due to the use of SBE as a filler in matrix multi grand size (sand to gravel).
THE EFFECT OF PICKING UNCERTAINTY WINDOW INTERVAL ON HYPOCENTER MICRO-EARTHQUAKE (MEQ) LOCATION USING GEIGER METHOD Utama, Widya; Ardhya Garini, Sherly; Sere Lansa, Fradana
Journal of Marine-Earth Science and Technology Vol. 3 No. 1 (2022): April
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v3i1.439

Abstract

Identification of the initial phase of the primary (P) waves at each seismic station is often inconsistent and implies the operator’s subjectivity, due to the high noise level. Errors in identifying the initial phase of the P waves can significantly bias the location of the hypocenter. In this study, the data used is one micro-earthquake (MEQ) event recorded by 8 seismic stations. At each seismic station, the P waves arrival time was measured repeatedly, to obtain the picking uncertainty time window interval of the P waves arrival time. The P waves arrival time data was processed using the Geiger method to obtain the MEQ hypocenter location. Based on the processing results, the determination of the arrival time of the P waves depends on the width of the time window and the amplitude scale used. The picking uncertainty time window interval will be narrower for arrival time observations with an enlarged time window and amplitude scale. Time window intervalin the range of 0,007-0,049 seconds, in this study significantly refracted the MEQ hypocenter location. The results of determining the location of the MEQ hypocenter using the Geiger method only produced two variants of the RMS error value with a difference of 0.001 seconds. However, the difference in the RMS error value is associated with a shift in the epicenter in the range of 2 – 21,1 meters and a shift in the elevation of the hypocenter in the range of 3-15 meters.
Co-Authors A F, Fachri Almawali Abigail, Nathasya Adhitama Rachman Adi Gunawan, Adi Adib Banuboro Agung Dimas Prabowo Darmawan Agung T. Nugroho Agung, B Harjo Agustin, Arin Dwi Ahdi Awaludin Sholeh Ahmad Widodo Aisyah, Maulidah Akbar, Firman Syaifuddin Al Viandari, Nourma Aldi, Radem Alifiansyah Faizal Amalia, Masruro Amelia Rosana Putri Amelia Rosana Putri Amien Widodo Amir, Moh Faisal Andriyan Yulikasari Andriyan Yulikasari Anggi, Arwin Anicetus Wihardjaka Anis Berry Annisa R. Varhana Anwar, Muhammad Khayrul ARDHYA GARINI, SHERLY Arif Darmawan Arif Darmawan Ariffiyanto, Wahyu Arin Dwi Agustin Arin Dwi Agustin Aripin, Pegri Rohmat Ariyanti, Nita Arphan, Frankstein Arphan, Frankstein Arwin Anggi Ayi Saeful Bahri Ayi Syaeful B. Aziz, Siti Kamilia B Harjo Agung Bagus Wibisono Bahri, Ayi Syaeful Bakruddin, Bakruddin Billy Dovan Yuspancana Bowo, Erstelle Budi Budi - Budiraharjo, Satrio Budy Wiryawan Bulkis Kanata Chemistra, Paul Cipta Ramadani Deni Irawan Dewi, Kiki Kartika Dewi, Kiki Kartika Dezulfakar, Hafidz Dhea Pratama Novian Putra Dinda Maulina Dwa Desa Warnana Dwa Desa Warnana Eki Komara Fachri Almawali A F Fadlillah Nur R Faizal, Alifiansyah Fajar, M. Haris Miftakhul Falah, Hanif Fajrul Fatahillah, Yosar fatimah Fatimah Fikriyah, Vareyna Tsamrotul Firdaus , Hana Sugiastu Firmansyah Saifuddin Frasiska, Rindi Ayu Fuadur K Garini, Sherly A. Garini, Sherly Ardhya Gigih Prakoso W Gigih Prakoso Wigantiyoko Gilang Reyhan Gilang Reyhan Gunawan, Adi Hafidz Dezulfakar Halim, Gian Ricardo Halim, Gian Ricardo Hamzah Abdullah Mubarak Hamzah Abdullah Mubarak Hana Sugiastu Firdaus Hari Purnomo Haris Purna W Harto, Moch. Fauzan Dwi Hartono, Karim Rahman Hasibatul Farida R Hasibatul Farida Rismayanti Heru Mirmanto Hibatullah, Ahmad Irfaan Hilyah, Anik Hutapea, Merry C. I Putu Khrisna Wijaya Ikmal Amrin Imaaduddiin, Muhammad Hafiizh Imaaduddiin, Muhammad Hafiizh Indri Silvia Dewi Indriani, Rista F. Indriani, Rista Fitri Insani, Alif N. F. Ira M. Anjasmara, Ira M. Jaka Rahadiansyah Jefrizal Sihombing Jefrizal Sihombing Jobit Parapat Jobit Parapat Juan Pandu Juan Pandu Gya Nur Rochman K, Fuadur Zakki Karim Rahman Hartono Kevin Daniel Munthe Kevin Daniel Munthe Kiki Kartika Dewi Komara, Eki Krishna Wijaya Kukuh Suprayogi Kukuh Suprayogi, Kukuh L, Putri Rida Lestari, Wien Lestyowati, Titis Linda Silvia, Linda Lita Novitasari Lubis, Azwani M Haris Miftakhul Fajar M Singgih Purwanto M Singgih Purwanto M Singgih Purwanto M, Mariyanto M. Iqbal Maulana M. Singgih Purwanto M. Singgih Purwanto M. Singgih Purwanto Mahardianti , Melisa Amalia Makky S. Jaya Makky S. Jaya, Makky S. Mariyanto Mariyanto Mariyono, M. Masruro Amalia Maulana Hutama Rahma Putra Maulana, M. Iqbal Maulidah Aisyah Maulidah Aisyah Maulidah Aisyah Maulina, Dinda Mei Devi Bun Mei Devi Bun Meidi YT, Nagari Melisa Amalia Mahardianti Moch. Fauzan Dwi Harto Muhammad Iqbal Muhammad Taufik MUHAMMAD TAUFIK Mustika Bohal, Yolanda Nahari Rasif Nathasya Abigail Nisya Aviani Nisya Aviani Nomensen M. H. Sitorus Nourma Al Viandari Novitasari, Lita Nur Isnaini Rahmaningtyas Palgunadi, Kadek H. Parapat, Jobit Paul Chemistra Paul Chemistra Pegri Aripin Pegri Rohmat Aripin Pratama, Dandi S. Purba, Theresia Purwanto, M. Singgih Purwanto, Mohammad Singgih Purwanto, Singgih Putra, Dhea P. N. Putra, Dhea Pratama Novian Putra, Risal Ardiansyah Putri Rida L Putri, Umi Muti'ah R, Fadlillah Nur Rachman, Adhitama Raden Aldi Rahadiansyah, Jaka Rahadinata, Tony Rahmaningtyas, Nur Isnaini Ramadhani, Annisa V. Rayhan Farisi Ramadhan Regian Erstelle Bowo Reksa Ikmaluhakim, Dihein Risal Ardiansyah Putra Rismayanti, Hasibatul Farida Rista Fitri Indriani Rista Fitri Indriani Robi Alfaq Abdillah SA, Yusroni Satrio Budiraharjo Sayyidatul Khoiridah Sayyidatul Khoiridah Sere Lansa, Fradana Setiawan, Irfan Adiputra Sherly Ardhya Garini Sherly Ardhya Garini Sholeh, Ahdi Awaludin Sidi, Amor K. Simon Sadok Siregar, Simon Sadok Singgih Purwanto Sitorus, Nomensen Sitorus, Nomensen Sri Cahyo Wahyono Suminar Pratapa Supeno Surya, Triswan Madani Ade Surya, Triswan Madani Ade Surya, Triswan Mardani Ade Suto Suto - Syaeful Bahri Syaifuddin, Firman Syaifuddin, Firman Syifaurrohman, Yusuf Syifaurrohman, Yusuf Taufik , Muhammad Teti Zubaidah Theresia Romauli Purba Titah Anggraeni Putri Kinasih Tony Rahadinata Totok Parafianto Totok Wianto Tri Martha Kusuma Putra Tri Martha Kusuma Putra, Tri Martha Kusuma Tricahyo Agung Budi Harjo Triswan Mardani Ade Surya Triswan Mardani Ade Surya Tsaniyah, Zahrotuts Vahira Tri Kemalasari Vareyna Tsamrotul Fikriyah Varhana, Annisa R. Viandari, Nourma Al W, Haris Purna Wibisono, Bagus Widodo, Ahmad Wigantiyoko, Gigih Prakoso Wihardjaka , Anicetus Wihardjaka, Anicetus Wijaya, Krishna Yoga Satria I Yoga Satria Iswandaru Yosar Fatahillah Yosar Fatahillah Fatahillah Yulikasari, Andriyan Yuri Syahwirawan Yusri Prayitna Zulqaisi Zulqaisi