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<![CDATA[Identifikasi Struktur Tektonik Sistem Geothermal Non-Vulkanik Daerah Nyelanding dan Permis Bangka Selatan Menggunakan Metode Gravity ]]>
<![CDATA[Afni, Githa Nurvilia]]>;
<![CDATA[Kusmita, Tri]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 2 No 1 (2021): Desember 2021 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v2i1.3210
<![CDATA[Non-volcanic geothermal is a heat system that is not related to volcanism such as in Nyelanding and Permis areas. In previous studies, hot springs in the Nyelanding area were spread from West to Northeast, with the constituent rocks of sandstone, dry gravel and granite. In the Permis area, the manifestation is influenced by shear faults trending Northwest to Southeast and the geothermal source is granite. Therefore, this study was conducted to determine the strenght of local tectonic structures using the gravity method. The data used in this study are the FAA (Free Air Anomaly) and topography data obtained through the TOPEX website. The gravity anomaly is obtained by performing spectral analysis using the Fourier Transform and moving average filter. 2D modeling is performed using inverse modeling with the smoothness constraint equation. The result of this research is that the Permis and Nyelanding geothermal systems are controlled by local tectonic structures in the Northwest and Southeast of the study area, in the form of fractures (possibly faults) with a Northeast – Southwest direction]]>
<![CDATA[Analisis Anomali Gravity Daerah Panas Bumi Non-Vulkanik Di Bangka Tengah (Studi Kasus Panas Bumi Terak dan Keretak) ]]>
<![CDATA[Gusnia, Eri]]>;
<![CDATA[Kusmita, Tri]]>;
<![CDATA[Indriawati, Anisa]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 2 No 2 (2022): Juni 2022 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v2i2.3233
<![CDATA[Central Bangka is one area that has geothermal potential such as the Terak and Keretak area. These area have hot spring manifestation. Geothermal manifestations in Bangka is the type of non-volcanic radiogenic geothermal. Origin sources of this manifestation suspected from rocks run into the crack, folds and faults. The purpose of this study was to identify rock speading in geothermal area and it’s correlation between geothermal manifestation in Terak and Keretak. The data obtained from the TOPEX/Poseidon satellite is in the form of FAA (Free Air Anomaly) data. The data is then corrected using Burger correction and field correction. Spectral analysis was performed by Fourier transform with moving average filter. The results showed that Complete Bouger Anomaly has 13 mGal-39 mGal. Regional anomaly has 5,4 mGal - 9.8 mGal. Residual anomaly has 7 mGal sampai 29 mGal. There area was consist of intrusive granite rock from the Granite Klabat formation, clas and sandstone from Tanjung Genting Formation. Gravity anomaly shown Geothermal Terak and Keretak are composed of the same distribution of rock.]]>
<![CDATA[Sebaran Batuan Daerah Panas bumi Terak Bangka Tengah berdasarkan Anomali Magnetik ]]>
<![CDATA[Alawiyah, Umi]]>;
<![CDATA[Kusmita, Tri]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 3 No 1 (2022): Desember 2022 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v3i1.3356
<![CDATA[Geothermal potential in Indonesia has various non volcanic geothermal sources, one of which is geothermal in the Terak Village area of Central Bangka. The geothermal geological structure of Terak is in the form of granite rocks with normal faults and horizontal faults or what is called the Pemali fault. The purpose of this research is to identify rock spreading on geothermal Terak based on magnetic anomaly. Magnetic data was processing by applied diurnal correction, IGRF correction, RTE (Reduce to the Equator) correction. Reginal dan residual anomaly was separation using upward continuation 350 m, 400 m, and 450 m. The result shown that rock spreading on geothermal Terak was consist by granite rock from Granite Klabat formation in north Mangkol Hill, sandstone from Tanjung Genting formation on West study area. Schist and phyllite was dominated on northeast and northwest area.]]>
<![CDATA[Identifikasi Sesar dengan Menggunakan Metode Gaya Berat (Studi Kasus: Sulawesi Tengah) ]]>
<![CDATA[Mutia, Rara]]>;
<![CDATA[Mardani, Mardani]]>;
<![CDATA[Fathia, Suci]]>;
<![CDATA[Kusmita, Tri]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 3 No 2 (2023): Juni 2023 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v3i2.3552
<![CDATA[The study of the geological structure of Sulawesi Island, especially the Central Sulawesi region, is very interesting because it has high complexity as a result of the dynamic interactions of the world's three main plates. Indications of high seismic activity and deformation processes in the Central Sulawesi region can be found from the morphological appearance and activity of several existing faults such as the Palu-Koro fault, the Lawanopo fault, and the Matano fault. The data used in this study are secondary data measuring the distribution of gravitational field anomalies (FAA) and topographical data using the Topex application. At CBA values ranging from 31 mGal to 56 mGal. The height anomaly on the CBA contour map is shown in red to light purple which has a value range of 40.7 mGal to 62.7mGal. Low anomaly is shown in light green to blue which has a value range of 27.3 mGal to 3.2 mGal. The regional gravity anomaly values range from 5.1 mGal to 62.8 mGal with a distribution of gravity anomalies from south to north. While in this study it can only be explained that the residual anomaly value is influenced by rock type and density. The high anomaly found in the southern part is thought to be caused by rocks having high density and being in a sedimentary rock environment which has low density.]]>
<![CDATA[Analisis Uji Chemical Oxygen Demand (COD) pada Air Limbah Sawit di Dinas Lingkungan Hidup dan Kehutanan Provinsi Bangka Belitung ]]>
<![CDATA[Rusdianto, Rusdianto]]>;
<![CDATA[Susanti, Susanti]]>;
<![CDATA[Kusmita, Tri]]>;
<![CDATA[Aryanto, Liyana]]>;
<![CDATA[Talitha, Talitha]]>;
<![CDATA[Mursid, Mursid]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 3 No 2 (2023): Juni 2023 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v3i2.3553
<![CDATA[Indonesia is the largest natural resource producing country in the world, the management of these natural resources requires assistance from various industries. In addition to providing an increase in the regional economy, industry can also cause an increase in waste which can cause environmental damage. Waste that is directly discharged into a water will cause a decrease in water quality, especially for palm oil liquid waste that has not met the specified wastewater quality standards. Chemical Oxygen Demand (COD) is one of the most important parameters in measuring water quality or water contamination load derived from dissolved oxygen in water or waste. Therefore, on this occasion, COD testing will be carried out to determine the level of dissolved oxygen in palm oil liquid waste. From the implementation of the calibration curve of COD testing in wastewater, it was declared accepted because the value of the test correlation coefficient was greater, namely r = 0.9994 than the value of the correlation coefficient set by SNI, namely r = 0.995. While precision data can be accepted if the value of % RPD is not greater than 10% of the test results.]]>
<![CDATA[Pengukuran Kualitas Air Limbah Sawit Berdasarkan Baku Mutu Air Limbah Menggunakan AAS ]]>
<![CDATA[Rusdianto, Rusdianto]]>;
<![CDATA[Ivandi, Syachrul]]>;
<![CDATA[Kusmita, Tri]]>;
<![CDATA[Apriliazmi, Ilhafurroihan]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 1 (2023): Desember 2023 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v4i1.3554
<![CDATA[Palm oil industry waste is waste generated from the palm oil processing process. Palm oil liquid waste generally contains heavy metals, one of which is Cu and Zn. The presence of excessive Cu and Zn heavy metals can have a negative impact on living things and the surrounding environment. In this journal, the determination of the heavy metal content of Cu and Zn in palm oil wastewater was carried out using the AAS method with acetylene gas at a wavelength of 324.8 nm to determine the content of Cu metal content and at a wavelength of 213.9 nm to determine the Zn metal content. The results of determining the content of heavy metals Cu and Zn in sempel 1, 2 and 3 contained in palm oil wastewater which are still below the maximum limit of the quality standards obtained, namely less than 2 ppm for Cu metal and less than 5 ppm for Zn metal. utilized by living things and the surrounding environment.]]>
<![CDATA[Analisis b-value Gempabumi Menggunakan Metode Gutenberg-Richter Berdasarkan Estimasi Maximum Likelihood Di Daerah Sulawesi Utara ]]>
<![CDATA[Maulinda, Reski]]>;
<![CDATA[Kusmita, Tri]]>;
<![CDATA[Aldila, Herman]]>;
<![CDATA[Triani, Triani]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v4i2.3804
<![CDATA[Sulawesi is an area prone to earthquakes. This is because the Sulawesi region is flanked by three main plates, namely the Pacific Ocean plate moving westward, the Australian Continental Plate moving northward, and the Eurasian Plate moving south-southeast. This situation causes a high level of seismicity in the Sulawesi region. The Sulawesi region has a fairly complex tectonic setting so that the activity of earthquakes in the Sulawesi region is also interesting to study. The level of seismicity depends on the degree of fragility of the rock (b-value) and the distribution of earthquakes in the region. This research was conducted to determine the b-value of earthquakes in the North Sulawesi region. The method used for this research is the Gutenberg-Richter method based on the Maximum Likelihood estimation. Maximum Likelihood Estimation is a method used to statistically calculate earthquake activity parameters. The software used are ArcGIS and Microsoft Excel. The research was conducted in North Sulawesi with coordinates 118° East - 125° East 1° North Latitude - 6° South Latitude. The data used is earthquake catalog data obtained from BMKG with earthquake data for a period of 10 years (2012-2021). Based on the results of the analysis of the distribution of seismicity based on magnitude, it is more towards the Sulawesi Sea and the distribution of seismicity based on depth is shallow. The result of calculating the b-value is 0.3537 and the a-value is 3.0932. It can be concluded that the North Sulawesi region has a fairly large chance of an earthquake occurring]]>
<![CDATA[Penentuan Tingkat Resiko Gempabumi Berdasarkan Peak Ground Acceleration (PGA) di Daerah Istimewa Yogyakarta ]]>
<![CDATA[octavia, yoanda wanda]]>;
<![CDATA[Kusmita, Tri]]>;
<![CDATA[Mardiyanto, Mardiyanto]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 5 No 1 (2024): Desember 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v5i1.3805
<![CDATA[Special Region of Yogyakarta is an areas with highest probability of earthquakes. This is caused by the movement of the Indo-Australian plate in the southern Java and the movement of local faults spread across in other area. Therefore, the Special Region of Yogyakarta is interesting to study. This study aims to determine intensity and Peak Ground Acceleration (PGA) value and then describe the potetntial impact due to future earthquakes.. Earthquake data was obtained from a database catalog of earthquake events recorded at the BMKG Geophysics Station Class I Sleman at years 2005-2015. The method used to determine the PGA is Gutenberg-Richter. The results in this study, PGA was applied by Gutenberg-Richter (PGA) value with the Gutenberg-Ritchter method has a value highest 147 gal (VII-IX MMI). The area with the potetntial impact due to future earthquake is Bantul regency.]]>
<![CDATA[Identifikasi Pola Aliran Air Tanah di Lapangan Panas Bumi Non-Vulkanik Desa Nyelanding Kabupaten Bangka Selatan Berdasarkan Anomali Self-Potential ]]>
<![CDATA[Widyaningrum, Yekti]]>;
<![CDATA[Indriawati, Anisa]]>;
<![CDATA[Afni, Githa Nurvilia]]>;
<![CDATA[Gusnia, Eri]]>;
<![CDATA[Kusmita, Tri]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 3 No 2 (2023): Juni 2023 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v3i2.4311
<![CDATA[As one of unique non-volcanic geothermal field in Indonesia, mapping the groundwater flow in Nyelanding Village, South Bangka is essential as preliminary study for further exploration activity if the geothermal manifestation. In order to achieve this goal, we conduct a research using natural electrical properties of subsurface, Self-Potentials (SP) method. In this study, fixed-based technique was used where the spacing between measurement stations is the multiplication of 10 m along three lines at the study area. Raw field data (potential value) was corrected to diurnal and closure corrections. Further, SP anomaly was plotted and combined with topography data to be analyzed. The result shows potential value raging from -25mV to 100mV which in agreement with the lowest and highest elevation in topography map, respectively. This means, these values are controlled by topographic feature in the study area. Thus, in conclusion, the groundwater flows from the West to North East and South East part of the study area]]>
<![CDATA[Analisis Data Angin Permukaan di Bandara Udara Depati Amir Pangkalpinang Menggunakan Metode Windrose ]]>
<![CDATA[Septika, Dea]]>;
<![CDATA[Fatikasari, Annisa]]>;
<![CDATA[Kusmita, Tri]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 1 (2023): Desember 2023 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v4i1.4698
<![CDATA[Pangkalpinang is a city in the Bangka Belitung Islands that is close to the sea. This indicates that Pangkalpinang is influenced by land winds and sea breezes. The purpose of this study is to analyse the percentage of wind speed and maximum wind speed in Pangkalpinang City in each month. The data used were obtained from synoptic observations of the Depati Amir Class I Meteorological Station in Pangkalpinang from January to December from 2011 to 2020. The data obtained is processed using WRPLOT (Wind Rose Plots for Meteorological Data) software to determine the direction and magnitude of wind speed and produce wind pattern images in the form of wind rose diagrams. The results obtained show that the dominant wind blows from the Southeast (112 - 157°) with the highest wind speed of 1 - 4 knots with a percentage of 42.9%, while the maximum wind speed throughout 2011 - 2020 is 28 knots which occurred in the period January - December 2013. The results obtained show that the wind conditions at Depati Amir Airport Pangkalpinang are still safe for aircraft take-off and landing operations.]]>
