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COMPARISON TWO LOCATIONS OF LIGHTNING DETECTION Septiadi, Deni; Suntoko, Hadi; Widodo, Anton; Noor, Riza Arian
Jurnal Meteorologi Klimatologi dan Geofisika Vol 5 No 2 (2018): Jurnal Meteorologi Klimatologi dan Geofisika
Publisher : Unit Penelitian dan Pengabdian Masyarakat Sekolah Tinggi Meteorologi Klimatologi dan Geofisika

The objective of this study was to identify the lightning distribution by comparing of two lightning sensors located in Jakarta and Bandung. Using Storm Tracker Lightning Detector maintained by the Indonesia Agency for Meteorology, Climatology and Geophysics (BMKG), Cloud-to-Ground lightning (CG) analyzed with a various radius i.e. 0.1?, 0.5? and 1.0?. Storm Tracker Lightning Detector consists of an antenna connected to the PCI card and able to detect Low Frequency (LF) of radio signals generated by lightning (10 KHz to 200 KHz). The data used are based on the available records of near real time 15 minutes CG lightning data. This study aims at revealing ideally possible location of the lightning sensor to optimize lightning detection. For further analysis, the distribution of the CG lightning estimated in the target area located about the middle between Jakarta and Bandung. The analysis of lightning described by calculating the detection efficiency of lightning sensor and the analysis of lightning location error.

STUDY ON HYDROGEOLOGICAL ASPECT OF GALANG SUB-DISTRICT, BATAM CITY FOR ACCEPTANCE OF PROSPECTIVE NPP SITES alimah, siti; Alhakim, Euis Etty; Suntoko, Hadi; Sunarko, Sunarko; Mudjiono, Mudjiono
Majalah Ilmiah Pengkajian Industri Vol. 14 No. 2 (2020): Majalah Ilmiah Pengkajian Industri
Publisher : Deputi TIRBR-BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v14i2.4200

This is a preliminary study in the selection of Nuclear Power Plant (NPP) site in Batam's Barelang area to support industrial growth in the area in the future. The initial site selection was conducted in 2015 and 2017 in the pre-survey phase, considering hydrogeological aspect. The results of previous research showed four potential areas, namely Pasir Panjang Beach, Tanjung Batu, Dapur 3 and Tanjung Rame. The hydrogeological aspect plays an important role in the consideration of site acceptance. This is related to the consideration of potential flow of radioactively contaminated groundwater seepage in the site area, in the event of a potential release. The acceptance of the NPP site from the hydrogeological aspect is based on the siteâ€™s permeable geological formation and porosity condition, where groundwater can be stored. The purpose of the study was to assess the potential site in Galang Sub-district, Batam City based on hydrogeological aspects which include surface geology, groundwater productivity and rock porosity. Research methods include primary and secondary data collection, literature review and ranking analysis. The results showed that Tanjung Batu, Dapur 3 and Tanjung Rame could be chosen as the potential sites for NPP based on the hydrogeological aspect. The three regions have surface geology in the form of sandstone, clay and claystone rock with medium rock porosity level and medium groundwater productivity. Pasir Panjang Beach is less preferable because it has a high porosity of rocks with the productivity of aquifers is being spread widely. Key Words: Hydrogeology; Site selection; Acceptance of NPP site Â

The Preliminary Sedimentation Pattern Study in West Borneo NPP Potential Site Alhakim, Euis E; Ryanto, Theo A; Susiati, Heni; Suntoko, Hadi
Indonesian Journal of Geography Vol 56, No 2 (2024): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.76686

Coastal environmet dynamics study is one of the NPP site feseability studies that need to be conducted to understand the potential external risk in an NPP development. The Pantai Gosong area was the preferred potential site for the NPP development and was located in the coastal area. Therefore, external factors such as abrasion or sedimentation would influence the NPP site. This research studied the sedimentation pattern of the Pantai Gosong coastal area based on the landform analysis. The results showed that the landform in the Pantai Gosong area was classified as a highly eroded hill, lowly eroded footplain, natural levee-back swamp, beach ridge, alluvial plain, and coastal alluvial plain. The sedimentation process in the northern coastal area of Pantai Gosong that has lowly eroded footplain landform was more intense than in the southern part. The analysis was well correlated with the estimated sediment thickness from the microtremor method analysis that showed that the northern coastal area has higher sediment deposits with 12.7 to 21.7 m of thickness than the southern coastal area with 3.2 to 12.6 m thickness. The northern footplain in the Pantai Gosong coastal area was expected to have higher sedimentation than the southern part continuously

Empirical Equation between Predominant Frequency and Sediment Thickness in Plampang, West Nusa Tenggara Iswanto, Eko Rudi; Riyanto, Theo Alvin; Suntoko, Hadi
EKSPLORIUM Vol 44, No 2 (2023): November 2023
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2023.6918

Soil characteristics mapping is one of the essential aspects in the development of a region. Soil characteristics such as the predominant frequency and thickness of the sediment layer are needed to ensure the capacity of soil against the load of an infrastructure construction. The existence of tectonic activity causes West Nusa Tenggara Province to be an area with high seismic activity. Along with the plan to accelerate the development of the Samota Area, seismic studies are one of the aspects that determine project feasibility. The predominant frequency value from the results of microtremor measurements is used in the development of an empirical formula to predict soil thickness in the Plampang area. The empirical formula from previous research is used as a conformity test of the empirical formula obtained. Empirical equations are then used to map variations in sediment thickness in the Plampang area, which are justified based on geological data. The results of the sediment thickness map based on the empirical formula for the Plampang area showed a good correlation with the predominant frequency and also showed a good correlation with the results of the formula that has been carried out by previous studies.

Identifikasi Patahan Menggunakan Analisis Data Deformasi Tanah di Tapak RDE Serpong Suntoko, Hadi; Sriyana
EKSPLORIUM Vol. 38 No. 2 (2017): NOVEMBER 2017
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2017.38.2.3352

Experimental Power Reactor (EPR) site is located in Serpong and it has a distance of ± 67 km from the Cimandiri active fault. Result of EPR site evaluation show that it is feasible and safe from the active fault. However, it is necessary to monitor the rock deformation by using Global Positioning System(GPS) tool. The goal is to obtain precise coordinates through GPS data to identify the presence of active fault activity and its impact on the site. The monitoring is using six measuring points configuration mounted crossing the southeast-northwest suppose fault line direction. The research method is using coordinate data collection from BATAN GPS periodic station and BIG GPS continuous station in radius 25 km. Data processing is using Bernese Version 5.2 Software, proceed radially from station 1 as reference point and then continued by data interpretation. The Analysis result shows that the fault/tectonic condition near EPR site is in the range of 0.05 microstrain which is an area with stable tectonic condition.

Pendugaan Awal Patahan di Pulau Jawa Menggunakan Anomali Gravitasi dan Riwayat Kegempaan Ryanto, Theo Alvin; Suntoko, Hadi; Setiaji, Abimanyu Bondan Wicaksono
EKSPLORIUM Vol. 40 No. 1 (2019): MEI 2019
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2019.40.1.5470

Information related to the fault existences is needed for industrial development planning, mainly on the Nuclear Power Plant (NPP) site planning. This study is aimed to build preliminary prediction on faults existence in Java Island by using free-air gravity and earthquakes history data. The methodologies are separating regional with residual gravity anomalies and then analyzing them by correlating the continuity of their contrast values which have similarities with the distribution of earthquakes epicenters point. Based on the analysis, some lineaments in Java Island are predicted as faults which relatively directing to north-south and west-east.

Pendeteksian Keberadaan Struktur Sesar pada Batuan Vulkanik dengan Metode Magnetik Suntoko, Hadi; Nurdin, Muhammad; Susilo, Yarianto Sugeng Budi; Hamzah, Imam
EKSPLORIUM Vol. 33 No. 2 (2012): NOVEMBER 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.2.2661

Banten NPP site is located in Kramatwatu-Bojonegara district, Serang, it has a surface fault indication in volcanic rock it known that to Northwest-Southeast trending. Indications of the satellite imagery analysis maps confirm the straightness (lineament) at Bojonegara-1 fault. A lineament as fault structures to be necessary to prove existence of magnetic method in order to determine the continuity of Bojonegara-1 fault in the subsurface. The purpose of the study is to know the Bojonegara fault in the subsurface. Through on interpretation and analysis of the earth's magnetic field on the scale of an object to be caused a variety of sources it can be detected by intensity magnetic as a total magnetic moment of unity volume to study the condition of the deformed rocks. The study used are G856-AX Proton Magnetometer precession magnetometer (PPM) over a stretch of 300 m and 10 m intervals for the fault lineament. The measurement system uses two sensors and observations, corrected magnetic field strength is ideal as a reference for the total magnetic field anomalies. Preliminary results show that the fault lineament is indicated at the observation point with a depth to unknown so that it still need more detailed. Magnetic method is very good for an early review of fault structures with fast and simple.

Identifikasi Daerah Interes Calon Tapak PLTN Kalimantan Barat Berdasarkan Kriteria Umum Suntoko, Hadi
EKSPLORIUM Vol. 35 No. 1 (2014): MEI 2014
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2014.35.1.1839

Identification of interesting areas for the nuclear power plant site in general based on natural conditions and human activities has been carried out. The guidelines of International Atomic Energy Agency (IAEA) safety guide NS-R-3,(2003) concerning Site Evaluation, that the scope of study includes a regional, near regional, site vicinit, site area and assessment in West Kalimantan is regionally, includes Singkawang City, Bengkayang, Pontianak City, Pontianak Regency, Sanggau, Sekadau, Kubu Raya, North Kayong and Ketapang. The purpose of identify is to obtain interesting areas around the coastal region ± 3km to landward based on swamp conditions, the thickness of the peat, chemical industry, gas pipeline/oil, sea ports, river demarcation line, military sites, nature reserves/cultural/wildlife refuges, and population density. The methods used are description, identification, interpretation of secondary data and confirmation of a finite field, analyzed based on general criteria. Identification results obtained interesting areas includes Dekan Putih (Meliau-Sanggau), Kubu (Kubu Raya), Sukadana (North Kayong), Tempurukan (Ketapang).

Mikrozonasi di Daerah Plampang, Nusa Tenggara Barat Iswanto, Eko Rudi; Riyanto, Theo Alvin; Suntoko, Hadi
EKSPLORIUM Vol. 42 No. 1 (2021): MEI 2021
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2021.42.1.6243

Nusa Tenggara Barat (NTB) Province is an area with intense seismic activity. This phenomenon is caused by tectonic activity as the result of the convergency of the Eurasia-Australia Plates (subduction zone) in the south and the Flores Fault in the north as well as the presence of local faults. Regarding the plan to develop the Samota area in Sumbawa Island, NTB, a study concerning earthquakes should be done. The purpose of this study is to map the seismic vulnerability index (Kg) through microtremor measurement by using the Horizontal to Vertical Spectral Ratio (HVSR) analysis method. The result of the study is a seismic vulnerability map of the Plampang area which its northern part has a low seismic vulnerability index indicated by the amplification factor value of less than three compared to other areas. The geology of the northern part of the Plampang area consists of volcanic rocks which has hard rock characteristic, very thin sediment thickness, and composed of Tertiary or older rocks. Seismic vulnerability maps can be useful as a reference for earthquake mitigation to reduce its risks.

Empirical Equation between Predominant Frequency and Sediment Thickness in Plampang, West Nusa Tenggara Iswanto, Eko Rudi; Riyanto, Theo Alvin; Suntoko, Hadi
EKSPLORIUM Vol. 44 No. 2 (2023): NOVEMBER 2023
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2023.6918

Soil characteristics mapping is one of the essential aspects in the development of a region. Soil characteristics such as the predominant frequency and thickness of the sediment layer are needed to ensure the capacity of soil against the load of an infrastructure construction. The existence of tectonic activity causes West Nusa Tenggara Province to be an area with high seismic activity. Along with the plan to accelerate the development of the Samota Area, seismic studies are one of the aspects that determine project feasibility. The predominant frequency value from the results of microtremor measurements is used in the development of an empirical formula to predict soil thickness in the Plampang area. The empirical formula from previous research is used as a conformity test of the empirical formula obtained. Empirical equations are then used to map variations in sediment thickness in the Plampang area, which are justified based on geological data. The results of the sediment thickness map based on the empirical formula for the Plampang area showed a good correlation with the predominant frequency and also showed a good correlation with the results of the formula that has been carried out by previous studies

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