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Tunas Geografi
Published by Universitas Negeri Medan
ISSN : 2301606X     EISSN : 26229528     DOI : https://doi.org/10.24114/tgeo
Core Subject : Science, Education, Social,
Astronomy Earth & Planetary Sciences Education Environmental Science Other
The main focus of this journal is Geography Learning, Social and Human Geography, Regional Development, Geographic Information Systems, Remote Sensing, Disaster and Mitigation, Geology and Geomorphology, Oceanography and Coastal. This journal target is teachers, lecturers, graduates, and practitioners in the field of geography. As a scientific communication medium, this magazine serves to provide a publication tool for the development of concepts and theoretical studies, and actual issues relevant in the field of Geography. This journal is published twice a year in July and December and is circulated as a publication material for education in geography, geography, or other relevant fields.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 188 Documents
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The Influence of Social Media on University Students' Choice 0f Presidential Candidates in 2024 Laurencia Primawati Degodona; Rajagukguk, Jonson; Sarumaha, Zeni Oktavianis
Tunas Geografi Vol. 14 No. 1 (2025): JURNAL TUNAS GEOGRAFI
Publisher : Department of Geography Education, Faculty of Social Sciences, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/tgeo.v14i1.64662

Abstract

Social media has become a primary tool in influencing voter decisions, especially among young generations, in the 2024 Election. With a creative and interactive approach, platforms such as TikTok dominate in delivering political messages to university students, who are part of the millennial and Gen Z generations. This research employs a quantitative descriptive method using questionnaires on 120 students from HKBP Nommensen University to measure the influence of social media on the decision to vote for presidential and vice-presidential candidates. The hypothesis test results indicate a significant influence of social media on students' voting decisions. 70.9% of respondents consider social media as the main factor influencing their choice, with TikTok being the most influential platform (74.2%). Additionally, entertaining and creative political slogans such as "Ok Gas 02 Tabrak-Tabrak Masuk" influenced 57.5% of respondents. These findings support the hypothesis that social media significantly affects voting decisions. The significance value in the ANOVA test is 0.001 (< 0.05), indicating that the regression model is significant. Therefore, the alternative hypothesis (Hₐ) is accepted, meaning there is an essential influence between the use of social media and voting decisions, with a contribution of 78.1%. This reinforces the importance of political communication strategies based on social media with engaging and informative content. Indonesia's 2024 election demonstrates how social media, especially TikTok, shapes young voters' preferences by transcending regional boundaries and creating new spaces for political engagement.
Geography Learning Models in Improving Spatial Thinking Skills: A Literature Review Dewi, Ratri Purnama; Saidi, Ridwan; Somantri, Lili; Maryani, Enok
Tunas Geografi Vol. 14 No. 1 (2025): JURNAL TUNAS GEOGRAFI
Publisher : Department of Geography Education, Faculty of Social Sciences, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/tgeo.v14i1.65092

Abstract

Spatial thinking skills are essential in everyday life. These skills can be improved through geography learning. Various studies on efforts to improve spatial thinking skills through geography education have been conducted in Indonesia; however, none have specifically examined the various models, teaching materials, and learning outcomes. Through a comprehensive review of previous findings, this study was conducted to fill this gap. The results of this study can be helpful for teachers and researchers in further developing geography education. This study employs a qualitative research design, specifically a document study or literature review. Publish or Perish software is used in the process of exploring or conducting literature searches. Through the initial search process, a total of 61 documents were obtained. These documents were then reviewed individually, resulting in a total of 16 documents that met the inclusion criteria. The results of the study showed that the most widely applied geography learning model was Project-Based Learning, followed by Discovery Learning and EarthComm. The teaching materials used are Disaster and Disaster Management, Basics of Mapping, Remote Sensing, and Geographic Information Systems (GIS), Atmosphere, Hydrosphere, Lithosphere Dynamics and Its Impact on Life, and Potential of Indonesian Marine Waters. Through the application of the learning model, various improvements were obtained in several indicators of spatial skills. The Project-Based Learning model is the most successful approach in improving various indicators of spatial thinking skills, including Analogy, Aura, Pattern, Association, Form, and Analysis.
The Potential of Greenhouse Gas (GHG) Emissions From Energy Consumption in Culinary MSME Panjaitan, Kiki Pratiwi; Husin, Amir; Aththorick, T Alief
Tunas Geografi Vol. 13 No. 2 (2024): JURNAL TUNAS GEOGRAFI
Publisher : Department of Geography Education, Faculty of Social Sciences, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/tgeo.v13i2.65305

Abstract

The Earth's surface temperature increases each year due to activities carried out by individuals or companies. Calculating the carbon footprint is one way to determine the emissions generated by human activities. Micro, Small, and Medium Enterprise (MSME) business operators have the potential to contribute to the carbon footprints originating from the use of Liquefied Petroleum Gas (LPG), fuel, and electricity. This research serves as a preliminary analysis to understand MSMEs' GHG emissions from energy and fuel use and identify appropriate strategies to reduce their carbon footprint using a standardized calculation method. This research uses a carbon footprint calculation method based on the methodology established by the Intergovernmental Panel on Climate Change. The analysis results show that the most significant emission sources from culinary MSME activities are restaurants, with approximately 3,079 CO2eq/year, followed by fried chicken at an average of 2,682 CO2eq/year, and meatball soup at around 2,504 CO2eq/year. The MSME with the highest income is fried chicken, with an average monthly revenue of IDR 19,225,000, while the lowest income is from siomay at IDR 7,700,000 per month. Income has an impact of 93.3% on the carbon footprints. Management measures that can be taken include analyzing which stages of the production process require significant energy, so strategies can be formulated to reduce the emissions produced. Additionally, the government should promote carbon-saving movements and educate the public about energy-efficient household appliances.
Dynamics of Integrated Social Studies Learning Implementation in Junior High Schools: Case Study at SMPN 41 Medan Wardani, Aulia; Efranita Purba, Desi Marcelina; Batubara, Rina Mawardah; Sugiharto, Sugiharto; Lubis, Darwin Parlaungan; Novira, Nina; Permana, Sendi; Vanda, Vanda
Tunas Geografi Vol. 13 No. 2 (2024): JURNAL TUNAS GEOGRAFI
Publisher : Department of Geography Education, Faculty of Social Sciences, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/tgeo.v13i2.65527

Abstract

Integrated social studies learning is a form of integrative learning applied in junior high schools by integrating several disciplines into one subject, namely geography, economics, sociology, and history. This provides obstacles for teachers teaching integrated social studies learning. The study aimed to determine the teachers' constraints and students' understanding of integrated social studies learning at SMPN 41 Medan. The research method used is a descriptive qualitative method. The study results explain that the teacher's constraints in integrated social studies learning include difficulty understanding learning material outside the science teacher's field, limited time allocation, lack of learning facilities and infrastructure, and differences in each student's characteristics. Student understanding in terms of Integrated IPS learning is very high. This can be seen from students' interest during the learning process. It attracts students' attention with a percentage of 87.5% so that the majority of students in this situation feel the learning process is enjoyable and is considered a positive indication that teaching methods and strategies the learning used by the teacher has succeeded in attracting student interest so that they can understand the Integrated Social Sciences learning material. Students' understanding of social studies learning can be a benchmark for teacher success in integrating several disciplines into one subject.
Spectral Transformation Analysis of Sentinel-2A Imagery for Rice Production Estimation in Natar and Jati Agung Sub-Districts, South Lampung Regency Sijabat, Juniati; Simarmata, Nirmawana; Putra Perdana, Agung Mahadi
Tunas Geografi Vol. 14 No. 1 (2025): JURNAL TUNAS GEOGRAFI
Publisher : Department of Geography Education, Faculty of Social Sciences, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/tgeo.v14i1.69041

Abstract

Rice (Oryza sativa) is a key food commodity in Indonesia and plays a crucial role in ensuring national food security. South Lampung Regency, particularly Natar and Jati Agung Sub-districts, significantly contributes to rice production in the province. However, conventional rice yield estimation methods face limitations in terms of time, labor, and cost. This study aims to analyze the relationship between vegetation indices—Modified Soil Adjusted Vegetation Index (MSAVI), Soil Adjusted Vegetation Index (SAVI), and Rice Growth Vegetation Index (RGVI)—and rice productivity, as well as estimate rice yield using Sentinel-2A imagery in the study area. Data used include 2024 Sentinel-2A imagery and productivity measurements from 53 field observation points. The methods involve image classification, vegetation index calculation (SAVI, MSAVI, RGVI), Pearson correlation analysis, and yield estimation using multiple linear regression. The correlation results show r values of 0.870 (SAVI), 0.852 (MSAVI), and 0.667 (RGVI). The regression model yields an R² of 0.823 and an adjusted R² of 0.812. Yield estimates were classified into three categories: low (3.39–4.76 tons/ha), medium (4.76–6.13 tons/ha), and high (>6.13 tons/ha). This study demonstrates that remote sensing has strong potential to support sustainable agricultural practices and accurate, continuous rice yield estimation.
Mapping of Crime-Prone Areas Using Geographic Information Systems in Pematang Siantar City in 2025 Rajagukguk, Octovannes; Yuniastuti, Eni
Tunas Geografi Vol. 13 No. 2 (2024): JURNAL TUNAS GEOGRAFI
Publisher : Department of Geography Education, Faculty of Social Sciences, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/tgeo.v13i2.68998

Abstract

Crime is a social problem that continues to increase along with population growth and the complexity of urban activities. Pematang Siantar, the second most densely populated city in North Sumatra, faces various social challenges that contribute to a high crime rate. This study aims to map crime-prone areas and analyze the effect of population density on crime rates in 2025. The research employed a quantitative descriptive method with a Geographic Information System (GIS) approach. Primary data consisted of 302 crime cases in 2024 from the Pematang Siantar Police Department, demographic data from the Central Bureau of Statistics, and field observations of crime scene coordinates. Analysis techniques included buffer, kernel density, overlay, and simple linear regression. The results show that crime cases consisted of 191 cases of aggravated theft (63.25%), 103 cases of motor vehicle theft (34.11%), and 8 cases of robbery (2.64%). The highest distribution occurred in West Siantar (77 cases/25.50%), North Siantar (73 cases/24.17%), and Sitalasari (62 cases/20.53%), while the lowest was in Marihat (7 cases/2.32%). Regression analysis indicated that population density (R² = 0.185; sig. 0.174) did not significantly influence crime rates. This research contributes to the development of crime geography and provides a scientific basis for local government and law enforcement in designing spatial-based crime prevention strategies.
Analysis of Microfaces and Depositional Environment of Limestone in North Isimu Area, Gorontaolo Regency Robot, Ladya Cheryl; Permana, Aang Panji; Akase, Noviar
Tunas Geografi Vol. 13 No. 1 (2024): JURNAL TUNAS GEOGRAFI
Publisher : Department of Geography Education, Faculty of Social Sciences, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/tgeo.v13i1.41981

Abstract

The geological conditions in the northern part of Lake Limboto vary greatly from the constituent rocks to the working geological structures. Lithological variations consist of volcanic and plutonic rocks to limestone. The area where limestone is widely distributed is in the North Isimu Region, Gorontalo Regency. This research aims to analyze the geological conditions, microfacies and depositional environment of limestone in the North Isimu Region, Gorontalo Regency. The research methods used to achieve this goal consist of field surveys and petrographic laboratory analysis. Field surveys include taking rock samples, taking coordinate points, taking elevation, geomorphological observations, observing geological structures and taking field documentation. Meanwhile, petrographic analysis of rocks uses a polarizing microscope as a tool to follow up megascopic observations. Observation of rock incisions under a microscope using cross nicol and parallel nicol. Based on the results and discussion, it shows that the geomorphology of the research area includes structural hills with sub-parallel river flow patterns. The geological structure of the research area is a descending fault trending northwest-southeast. The research area is divided into four facies, namely foraminifera wackestone, crystalline limestone, foraminifera algae packstone and coralline floatstone. Standard microfacies (SMF) in the North Isimu Region consists of three SMF namely SMF-3, SMF-4 and SMF-5 with two limestone depositional environmental zones namely toe of slope (FZ-3) and slope (FZ-4). FZ-3 was deposited at the end of the foreslope zone and FZ-4 was deposited seaward of the foreslope from the edge of the carbonate debris platform.Keywords: Limestone; Microfacies; Depositional Environment; North Isimu
A New Competition: Changes in the Flow of Fruit Commodities Sales in Kalianda District, South Lampung Regency, Indonesia Nabillah, Ratu; Abubakar, Kamaru; Rijanta, R; Harini, Rika
Tunas Geografi Vol. 12 No. 2 (2023): JURNAL TUNAS GEOGRAFI
Publisher : Department of Geography Education, Faculty of Social Sciences, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/tgeo.v12i2.45119

Abstract

The COVID-19 pandemic transformed the industry into the strongest online industry of the last decade. One of the commodities that have experienced faster sales since the COVID-19 pandemic is healthy food; fruit is one of them. As a response to the crisis, online fruit traders have emerged using social media. Unfortunately, not all community groups can adapt to technology. Fruit traders who stay in the kiosk (selling offline) are included in the new left-behind group due to their inability to technology adaptation. This study aims to differentiate the sales flow of fruit commodities (before and after the appearance of online sales) and describe the advantages and disadvantages of each group (online traders and kiosk/offline traders). The data to answer the two research goals were processed in a qualitative descriptive way. The results show that online traders have a shorter sales flow than kiosk traders. The main advantages of online traders include using social media, which makes it easier to find market and customer information, low prices, and ownership of transportation. Meanwhile, the main disadvantages of offline fruit traders are the limited quantity of human resources, the inability to operate smartphones and social media, and not always having transportationKeywords: New Competition, Fruit Sales Flow, Online Trader, Kiosk Merchant
Spatial Structure Analysis in Regional Development Context at Samosir Regency Permana, Sendi; Siburian, Pukarda Jordan; Lubis, Darwin Parlaungan; Damanik, M Ridha Syafii; Rahmadi, M Taufik; Ryabtsev, Vladimir
Tunas Geografi Vol. 12 No. 2 (2023): JURNAL TUNAS GEOGRAFI
Publisher : Department of Geography Education, Faculty of Social Sciences, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/tgeo.v12i2.47494

Abstract

Regional inequality or disparity is a natural consequence of development and an unavoidable stage. This happens because of differences in population, natural resource potential and geographical conditions in each region. This research aims to analyze public service centers, inter-district interactions, and settlement patterns in the context of regional development in Samosir Regency. The study uses a descriptive method with a quantitative approach to analyze the centers of public services, inter-district interactions, and settlement patterns among districts in Samosir Regency using the tools of centrality index analysis, gravity model, and nearest neighbor analysis. The analysis results show that the public service facilities in Samosir Regency in 2021 include 517 units of educational facilities, 442 units of healthcare facilities, 561 units of religious facilities, and 2,418 units of economic facilities, with the service center located in Pangururan District with a total availability of 1,081 units, which has the highest centrality value of 966.63. The largest inter-district interactions occur in Palipi District with a total interaction of 11,671,532.31, while the smallest interaction occurs in Simanindo District with a total interaction of 749,250.15. The settlement pattern in Samosir Regency consists of 1 district with a random settlement pattern and 8 other districts with clustered settlement patterns. In the development of Samosir Regency, the influence of district interactions, service centers, and settlement patterns are important factors to be considered.Keywords: District, Service Center, Interaction, Settlement Pattern
Dynamics of Urban Heat Island and NO2 Gas During the Covid-19 Pandemic Risnayah, Siti; Mudhalifana, Waode Sitti; Restele, La Ode
Tunas Geografi Vol. 12 No. 2 (2023): JURNAL TUNAS GEOGRAFI
Publisher : Department of Geography Education, Faculty of Social Sciences, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/tgeo.v12i2.49303

Abstract

To know the COVID-19 pandemic™s impact on the environment, an analysis of Urban Heat Island and pollutant gas was carried out. From March to June 2020, the Indonesian government implemented the Large-Scale Social Restrictions (PSBB) policy, requiring people to limit activities in public places. The data used are Land Surface Temperature (LST) from the Terra MODIS and Nitrogen Dioxide (NO2) concentration from the TROPOMI sensor. The data is processed using the Google Earth Engine to produce comparative values before the PSBB implementation (2019), during (2020), and after (2021-2022). The LST will be derived into Surface Urban Heat Island (SUHI) to compare climate conditions in urban (Kendari) and rural areas (Ranomeeto, Lalonggasumeeto, North Moramo). The results show that reducing community activities during the pandemic was not able to reduce LST but succeeded in inhibiting the increase rate. The LST trend is more affected by rainfall variables where higher rainfall causes lower LST and vice versa. The SUHI value shows a downward trend, meaning that the Urban Heat Island effect has been inhibited. The most significant impact of PSBB was a 25.9% reduction in NO2 concentration. These results prove that the COVID-19 pandemic has successfully restored environmental health constantly exposed to air pollution. Keywords: COVID-19, Urban Heat Island, NO2, PSBB, Land Surface Temperature

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