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All Journal JGE (Jurnal Geofisika Eksplorasi) Jurnal Geocelebes Journal of Physics and Its Applications International Journal of Natural Science and Engineering Jurnal Pengabdian Masyarakat Indonesia TeknoKreatif: Jurnal Pengabdian kepada Masyarakat Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Widiatama, Angga Jati
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Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Energy Engineering Materials Science & Nanotechnology Physics Public Health Social Sciences Other

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Peningkatan Pemahaman Sadar Wisata di sekitar Situs Kebumian Desa Girimulyo, Kecamatan Marga Sekampung, Lampung Timur Widiatama, Angga Jati
TeknoKreatif: Jurnal Pengabdian kepada Masyarakat Vol 4 No 1 (2024): TEKNOKREATIF : Jurnal Pengabdian kepada Masyarakat Volume 4 No 1
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LP2M), Institut Teknologi Sumatera, Lampung, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/teknokreatif.v4i1.1674

Abstract

Provinsi Lampung memiliki Geowisata Gunungapi Perisai Sukadana yang merupakan gunungapi tipe perisai (Shield Volcano) terbesar di Indonesia. Informasi tentang geowisata ini relatif masih terbatas sehingga perlu disosialisasikan kepada masyarakat khususnya masyarakat yang awam terhadap ilmu kebumian sehingga mampu memberikan informasi dan cerita yang tepat. Metode yang digunakan dalam penelitian ini yaitu pendekatan metode observasi lapangan untuk mengidentifikasi keanekakragaman situs kebumian dan kuesioner digunakan untuk mengukur tingkat pemahaman masyarakat terhadap keanekaragaman dan proses pembembentukan situs kebumian. Hasil observasi menunjukkan situs kebumian di Desa Girimulyo merupakan bagian dari Gunungapi Purba Sukadana terdiri dari batuan beku basalt vesikuler yang terbentuk akibat hasil erupsi lelehan. Gunungapi Purba Sukadana memiliki daya tarik karena membentuk goa vulkanik yang terjadi akibat pendinginan magma basalt yang berumur 0,44 - 1,15 juta tahun lalu (Plistosen). Elemen geo+ pada Geowisata Gunungapi tertajuk agroforestri alpukat siger asli Lampung, yang diprogramkan sebagai pemberdayaan masyarakat berupa wisata petik buah. Hasil kuesioner menunjukkan bahwa pengetahuan masyarakat terhadap keanekaragaman situs kebumian meningkat setelah pembuatan media pembelajaran gunungapi dan diseminasi kepada masyarakat
GEOMORPHIC INDICES AND FAULT SEGMENTATION INDICATION OF MENANGA FAULT AT PESAWARAN, LAMPUNG Hendrawan, Rezki Naufan; Draniswari, Windi Anarta; Bakhtiar, Agim Yustian; Widiatama, Angga Jati
JGE (Jurnal Geofisika Eksplorasi) Vol 9, No 3 (2023)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v9i3.287

Abstract

Remote sensing and GIS are playing important roles in geomorphology and hazard risks analysis. Pesawaran area located near the Menanga Fault and recently on the risk of earthquake that happened along this fault.  Thus, it is essential to investigate the area actively affected by Menanga Fault as preliminary research about hazard risk related to Menanga Fault. The morphometry method based on DEMNAS and Landsat 8 was applied to evaluate the zone affected by Menanga Fault, and fracture data analysis was conducted to consider the possibility of fault segmentation resulting from its mechanism. The study area can be divided into 3 zones; zone A is greatly affected by Menanga Fault activity, zone B is affected by Menanga Fault and Mt. Pesawaran development, and zone C is tectonically less affected. Zone A landforms were not only formed as a result of Menanga Thrust fault but also the strike-slip fault segment.  Fault segmentation exists in this zone with different mechanisms (strike-slip and dip-slip), producing lineaments with different trends, and differentiation of river patterns.
PENENTUAN FASIES, LINGKUNGAN PENGENDAPAN DAN IDENTIFIKASI SEBARAN BATUBARA DI FORMASI PALEMBANG, RIAU, SUMATRA Simatupang, Sandy Wesly; Widiatama, Angga Jati; Natalia, Happy Christin
JGE (Jurnal Geofisika Eksplorasi) Vol. 10 No. 3 (2024)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v10i3.432

Abstract

Cekungan Sumatra Tengah memiliki cadangan batubara melimpah yang dikelompokkan dalam Formasi Palembang. Formasi Palembang memiliki ekuivalensi dengan Formasi Muaraenim di Cekungan Sumatra Selatan. Penelitian pada Formasi Palembang masih relatif minim sehingga diperlukan pembahasa terkait fasies, asosiasi fasies, lingkungan pengendapan, dan juga geometri persebaran lapisan agar dapat digunakan sebagai rujukan kegiatan eksplorasi. Metode penelitian berupa analisis data petrofisika dan pemodelan bawah permukaan dari delapan data sumur pemboran. Dari interpretasi litologi yang dilakukan terdapat empat litologi dan tiga endapan pada daerah penelitian yang terdiri dari batubara, shaly coal, batupasir, batulempung, endapan konglomerat, endapan pasir, endapan lempung.  Litofasies pada daerah penelitian terdiri dari fasies endapan lempung, endapan pasir, endapan konglomerat, batulempung, batupasir, shaly coal, dan fasies batubara. Asosiasi fasies pada daerah penelitian terdiri dari channel, sandy bedform, overbank fines, dan swamps yang menginterpretasikan bahwa litologi yang ada pada daerah penelitian terendapkan pada daerah fluvial. Berdasarkan pemodelan bawah permukaan, litologi batubara pada daerah penelitian memiliki geometri melensa/membaji yang persebarannya dominan kearah timur. Batubara pada daerah penelitian diinterpretasikan terbentuk pada lingkungan pengendapan swamp.
Groundwater Quality Analysis Based on Physical Properties of The Gunungtiga and Surrounding Areas Hilman, Zaki; Widiatama, Angga Jati; Awfa, Dion; Alfarishi, Bilal; Prayogo, Wisnu; Depri
International Journal of Natural Science and Engineering Vol. 7 No. 2 (2023): Juli
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v7i2.67866

Abstract

Gunungtiga area has never been studied for the quality of groundwater, and residents have also complained about the quality of groundwater, these became the basis for selecting the research location. This study aims to analyze groundwater quality in the Gunungtiga Region, Lampung Province. Quantitative approached was used for this research, it was carried out by mapping the groundwater level to estimate the recharge area and collecting data on parameters of the physical properties of groundwater, including color, taste, odor, temperature, pH, TDS, and EC.  The physical properties approach was selected because it is relatively cheap and easy to observe, the data collection can also be done in situ. The physical property parameter data is then checked based on the Republic of Indonesia Minister of Health Regulation No. 492 of 2010. The observations at 14 points showed that the groundwater level in the research area is relatively shallow towards the west or in the direction with higher topography, so it can be interpreted as a recharge area, and it flowed towards the east area which has lower topography. The physical properties of the groundwater had no taste, odor, or color. The EC value ranges from 188.07 to 1066.82 µs/cm, including fresh water, the pH ranges from 5.41 to 7.5, the temperature ranges from 27.2 to 29.7 0C, and the TDS value ranges from 94. 04-542.91 mg/l. Of the 14 observation points, only 1 location met the quality standards, namely 22/DP/02. Treatment is required before groundwater can be used, such as filtering.
IDENTIFICATION OF AQUIFER LAYERS USING THE ELECTRICAL RESISTIVITY TOMOGRAPHY (ERT) METHOD IN GUNUNG KASIH AREA Alviyanda, Alviyanda; Farduwin, Alhada; Nugraha, Purwaditya; Widiatama, Angga Jati; Natalia, Happy Christin; Ogara, Evan Rosyadi; Piqri, Hafidz
JGE (Jurnal Geofisika Eksplorasi) Vol. 11 No. 3 (2025)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v11i3.491

Abstract

The varied physiographic conditions of Lampung, from the west to the center and east, are the main factors in determining the geological field campus as a suitable learning environment. Gunung Kasih is one of the areas located on the Bukit Barisan Range, which has unique geological conditions with exposed basement rocks on the surface, making it a key factor in determining the geological field campus. However, the presence of crystalline basement rocks in Gunung Kasih prevents water from penetrating below the surface, thereby affecting the availability of groundwater for the local community. This study aims to identify aquifer layers around the Gunung Kasih area, using the Electrical Resistivity Tomography (ERT) method. Stratigraphically, based on field observations of rocks, the study area has lithology consisting of schist, marble, and sandstone in the western part, with a landscape characterised by structural hills. On the eastern side, volcanic deposits such as tuff and andesitic lava were found, with a denudational plain landscape. The geophysical survey was conducted using Wenner-Schlumberger configuration, with four survey lines oriented relatively west to east and north to south. Low resistivity anomalies are indicated by layers with resistivity values of 0–20.7 Ωm, while moderate-to-high anomalies have resistivity values of 29.9–89.9 Ωm. Very high resistivity anomalies are indicated by layers with resistivity values of 61.9–128 Ωm. In comparison with observations of rock outcrops and rock resistivity values, the aquifer layer is interpreted as being indicated by low resistivity anomalies in the relatively eastern part of the study area, which is near the surface to a depth of 15 metres and 25 metres. This layer is interpreted as tuffaceousrock comparable to the Hulusimpang Formation. The aquifer layer in the study area is interpreted as a shallow unconfined aquifer.
Electrokinetic Remediation Treatment of Chromium (Cr) Concentration and Distribution in Soil from the PT Semen Baturaja Cement Factory Environment Alfajrin, Achmad Chalid Afif; Komariah, Rahma Nur; Prasetia, Hendra; Halid, Muhammad Akmal; Aisyara, Arien; Simatupang, Lamtongam; Ghifari, Hamzah Daffa; Widiatama, Angga Jati; Arham, La Ode; Mukti, Aqil Chandra; Ningsih, Dina Widya; Ferdinan, Muhammad Rizky
Journal of Physics and Its Applications Vol 7, No 3 (2025): August 2025
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v7i3.25377

Abstract

PT Semen Baturaja, a cement production company in South Sumatra, Indonesia, holds a Mining Business License of 103.4 hectares, of which 64.23% was reclaimed during 2017–2021. However, the revegetation success rate remains low at only 9%, potentially due to excessive soil chromium (Cr) accumulation. This study investigates the application of electrokinetic remediation to reduce Cr concentrations and improve soil conditions for revegetation. The experiment was conducted on soil samples collected from Disposal Area 4 of PT Semen Baturaja, using a laboratory-scale setup with copper electrodes powered by a 20 V direct current, applied continuously for 48 hours. The results showed that Cr ions tend to migrate toward the anode due to electromigration, while redox reactions influence Cr distribution over time. The highest treatment efficiency was observed in segment one (11.123%), and the lowest in segment three (1.651%). These findings demonstrate the potential of electrokinetic remediation as a viable method for enhancing revegetation in Cr-contaminated post-mining soils.
Kerentanan dan Kapasitas Kabupaten Lampung Selatan dalam Menghadapi Ancaman Bencana Hendrawan, Rezki Naufan; Hilman, Zaki; Widiatama, Angga Jati; Al Farishi, Bilal; Zainuddin, Ahmad Dennil; Ayunda, Marsya
Jurnal Pengabdian Masyarakat Indonesia Vol 4 No 3 (2024): JPMI - Juni 2024
Publisher : CV Infinite Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jpmi.2179

Abstract

Kabupaten Lampung Selatan merupakan salah satu kabupaten yang terletak di ujung tenggara Provinsi Lampung. Berdasarkan Indeks Risiko Bencana Indonesia tahun 2021 diketahui bahwa Kabupaten Lampung Selatan memiliki indeks risiko bencana sedang yang meliputi ancaman bencana tinggi seperti gempabumi, tsunami, dan banjir. Tingkat risiko tentunya dipengaruhi bukan hanya tingkat bahaya bencana, tetapi dipengaruhi oleh kerentanan daerah dan kesiapsiagaan masyarakat setempat. Oleh karena itu, penting untuk dilakukan penilaian kerentanan dan kapasitas di Kabupaten Lampung Selatan untuk mengetahui seberapa besar potensi pengurangan tingkat risiko bencana. Penilaian Kerentanan dan Kapasitas Bencana di Kabupaten Lampung Selatan secara umum dikerjakan dengan berbasis sistem informasi geografis dan juga pemetaan sosial. Data informasi geografis diolah dengan metode fuzzy logic dengan tiga kelas pembobotan yakni rendah, sedang, dan tinggi sedangkan pemetaan sosial dilakukan dengan penilaian berbasis kuesioner yang diambil dari beberapa sampel masyarakat. Pengolahan data kerentanan mengacu kepada modul analisis kerentanan bencana dari turunan Perka BNPB No. 2 Tahun 2012. Berdasarkan hasil penilaian kerentanan dan kapasitas, diketahui bahwa Kecamatan Rajabasa memiliki urgensi untuk diproiritaskan dalam peningkatan kapasitas masyarakat.
Study of the Digital Geological Compass in Increasing the Effectiveness and Efficiency of Measuring Geological Structure Data in the Field Hendrawan, Rezki Naufan; Irsyad, Muhammad; Gunawan, Aditya; Zainuddin, Ahmad Dennil; Widiatama, Angga Jati
JURNAL GEOCELEBES Vol. 8 No. 2: October 2024
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/geocelebes.v8i2.36276

Abstract

This study compares the use of analog geological compasses and digital geological compasses in measuring fracture planes on crystalline rocks at the Lampung region. The measurement results demonstrate that using digital compasses yields higher time efficiency than analog compasses, with a reduction in measurement duration of over 50%. Although the dominant directions of the fracture planes were similar between the two methods, the inclination values and accuracies of each plane were not always consistent. Data processing using rose diagrams and stereonets indicates that the RockD application provides comparable results to measurements obtained using analog compasses. Therefore, the use of digital compass applications such as RockD can serve as an efficient alternative for geologists in collecting field data related to rock fractures, particularly in the context of quantitative data. However, analog geological compass is still recommended for measuring planes with on single-plane characteristics, such as rock bedding and fault mirrors. This study demonstrates the potential for development and transformation from analog geological compasses to digital geological compasses, and further research is needed to investigate the minimum number of fractures that can be measured with a digital geological compass to be considered statistically valid.
GEOMORPHIC INDICES AND FAULT SEGMENTATION INDICATION OF MENANGA FAULT AT PESAWARAN, LAMPUNG Hendrawan, Rezki Naufan; Draniswari, Windi Anarta; Bakhtiar, Agim Yustian; Widiatama, Angga Jati
JGE (Jurnal Geofisika Eksplorasi) Vol. 9 No. 3 (2023)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v9i3.287

Abstract

Remote sensing and GIS are playing important roles in geomorphology and hazard risks analysis. Pesawaran area located near the Menanga Fault and recently on the risk of earthquake that happened along this fault.  Thus, it is essential to investigate the area actively affected by Menanga Fault as preliminary research about hazard risk related to Menanga Fault. The morphometry method based on DEMNAS and Landsat 8 was applied to evaluate the zone affected by Menanga Fault, and fracture data analysis was conducted to consider the possibility of fault segmentation resulting from its mechanism. The study area can be divided into 3 zones; zone A is greatly affected by Menanga Fault activity, zone B is affected by Menanga Fault and Mt. Pesawaran development, and zone C is tectonically less affected. Zone A landforms were not only formed as a result of Menanga Thrust fault but also the strike-slip fault segment.  Fault segmentation exists in this zone with different mechanisms (strike-slip and dip-slip), producing lineaments with different trends, and differentiation of river patterns.
Karakteristik Geokimia Basal Alkali Formasi Manamas di Sungai Bihati, Baun, Pulau Timor Widiatama, Angga Jati; Santy, Lauti Dwita; Natalia, Happy Christin; Wahyudiono, Joko; Ikhram, Rinaldi
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.2021.42.1.6205

Abstract

The igneous rock of Manamas Formation in the Bihati River, Baun is one of the igneous rock outcrops in Timor Island that has not been widely studied based on its geochemical characteristic. This study aims to determine the genesis and processes that occur in the igneous rocks of the Manamas Formation within tectonic framework of Timor Island based on petrographic and geochemical analysis. X-ray Fluorescence (XRF) and Inductively Coupled Plasma-mass Spectrometery (ICP-MS) were used to determine the major elements, trace elements, and rare earth elements. The igneous rock of the Manamas Formation is a basalt intrusion with an alkaline affinity which shown an enrichment pattern of rare earth elements identical to Ocean Island Basalt (OIB). This study proves the existence of two different mechanisms of elemental enrichment, fluid related enrichment which related to the subduction activity of the Indian Ocean plate under the Banda Arc and also melt related enrichment which originated from the broken Indian Ocean plate which enters the OIB reservoir zone. The two different magmas then mix and underplating beneath the Banda Arc.
Co-Authors Aditya Gunawan, Aditya Aisyara, Arien Al Farishi, Bilal Alfajrin, Achmad Chalid Afif Alfarishi, Bilal Alviyanda, Alviyanda Arham, La Ode Ayunda, Marsya Bakhtiar, Agim Yustian Depri Dion Awfa Draniswari, Windi Anarta Farduwin, Alhada Ferdinan, Muhammad Rizky Ghifari, Hamzah Daffa Halid, Muhammad Akmal Hendra Prasetia Hendrawan, Rezki Naufan Hilman, Zaki Joko Wahyudiono Komariah, Rahma Nur Lauti Dwita Santy Muhammad Irsyad Mukti, Aqil Chandra Natalia, Happy Christin Ningsih, Dina Widya Nugraha, Purwaditya Ogara, Evan Rosyadi Piqri, Hafidz Prayogo, Wisnu Rezki Naufan Hendrawan Rinaldi Ikhram Simatupang, Lamtongam Simatupang, Sandy Wesly Zainuddin, Ahmad Dennil