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Rock strength has an important role in the mining industry. These forces can determine many aspects of mining such as slope geometry, excavation, blasting, and drilling. Rock strength can include tensile strength, compressive strength, and shear strength. In this case, the test is carried out to determine the correlation of uniaxial compressive strength and indirect tensile strength. The method used to determine the correlation of compressive strength and indirect tensile strength is by linear regression approach, which will then be analyzed for accuracy through Root Mean Square Error (RMSE), and Mean Absolute Percentage error (MAPE). This study used quantitative and qualitative methods, starting from the coordinate data of rock sampling locations, physical properties and mechanical properties. In this study, there were 6 sampling locations located in 2 different areas, namely Loa Janan and Sanga-sanga. The secondary data used are regional geological maps and maps of the area where the study is located. Furthermore, secondary data is processed using Arcgis software for mapping, and using Microsoft Excel software to assist in calculations in determining the value of physical and mechanical properties of rocks. The results of the compressive and tensile strength tests in this study showed a perfect corelation using linear regression, namely UCS= 3.9582 σt - 0.4004, with a correlation coefficient (R) of 0.972 and a determination coefficient (R2) of 0.945. and obtained RMSE 0.033 and MAPE 5.89%.

The determination of changes in the land surface is an event caused by changes in the volume of the rock layer below. and geological processes such as tectonic and volcanic activity, removal of material from the subsurface such as mining and natural causes such as the occurrence of holes in limestone. The purpose of this study is to determine the magnitude of land surface changes that occur in the Nias Island area caused by earthquakes. The data used in the processing stage with the DinSAR method in 2022 recording, with specifications of dual polarization VV + VH, beam mode IW (interferometric wide) and flight direction ascending. Sentinel 1 data used in this study are 4 pairs of scans, where each pair of scans consists of one scans being the master and another scans being the slave. The master image is the SAR image before the earthquake, while the slave image is after the earthquake. The magnitude of land surface changes that occurred on Nias Island, based on the 2022 earthquake, the largest uplift was the earthquake on December 30, 2022, with a range of values (1.012042) mm with an area of 72,641,981 Hectares. The largest subsidence occurred in the earthquake on December 30, 2022, with a range of values ranging from (-1.373125) mm to (-1.235427) mm with an area of 61347,891 Hectares.

Indonesia, as a country with complex geological conditions due to the convergence of various tectonic plates, is highly susceptible to natural disasters such as earthquakes, tsunamis, and volcanic eruptions. The city of Semarang, as the capital of Central Java Province, also frequently faces disasters such as floods, landslides, and earthquakes. Predicting the occurrence of natural disasters becomes crucial to mitigate the negative impacts they cause. This study uses the Markov chain method to predict natural disasters in the city of Semarang based on disaster data from 2018-2022. The prediction results indicate a 16% chance of floods, 34% chance of landslides, 10% chance of tornadoes, 22% chance of fires, and 17% chance of falling trees in 2023. Validation of the predictions against actual data for 2023 shows a relatively good match for floods and fires, but there are significant differences in the predictions for tornadoes and falling trees. These results indicate that the Markov chain method has potential in predicting disaster occurrences, but accuracy improvements are needed to account for weather variability and dynamic environmental factors. This research is expected to assist the government and society in enhancing disaster preparedness and mitigation in the future.

The Equator Pasaman Geopark area, with its natural beauty and cultural diversity, is a potential destination to be developed. Equator Pasaman Geopark is a geopark located in West Sumatra, Indonesia, which combines geological, biological, and cultural diversity. In addition to being an attractive tourist destination, this geopark also plays a role in the preservation of nature and culture, as well as sustainable local economic development. The uniqueness of the geopark, such as its location on the equator line, national history with the figure of Tuanku Imam Bonjol, and biodiversity, make it a valuable asset for tourism promotion and environmental education. Service activities were carried out at the National Cross Tourism Competition (LAWNAS). The purpose of this community service activity is the promotion of geoparks, environmental promotion, cultural preservation, local economic development, increasing tourism, and external party partnerships. The research method is to identify service to the integrated tourism system, then organize competitions, as well as promotion and marketing of geotourism and finally environmental education and conservation. The parties involved in this activity include local governments, communities, and community service teams. The results of this community service activity show that all contribute and are actively involved in this activity, thus making a positive contribution to the development of local tourism

Landslides are natural disasters that can result in loss of life and property. Therefore, it is necessary to carry out inventory research on areas prone to landslides. The model applied to determine the point of distribution of landslide disasters and areas of potential distribution of landslide disasters is a qualitative descriptive spatial method. Several factors that cause landslides are geology, rock properties, stratigraphy, geological structure, level of weathering and seismicity, climate, rainfall, thick soil, solum. , slope topography, vegetation density and human land use. The results of the analysis show that in Jayaura Regency, Sentani District, there are 3 classes of landslide hazard levels, namely not vulnerable, somewhat vulnerable, quite vulnerable, and vulnerable. In general, Jayapura Regency, Sentani sub-district, is quite prone to the spread of landslides, but there are three sub-districts that are vulnerable, namely Hinekombe sub-district, Sentani village, Bart, Sentani sub-district, Sereh village in the middle and Sentani sub-district, Tollan village,      

This research aims to investigate and optimize drilling strategies as an effort to increase production efficiency in the geological context of oil and gas production. Effective drilling is a key element in the exploitation of hydrocarbon resources, and this research combines geological analysis and drilling techniques to achieve optimal results. This study begins with an in-depth characterization of the physical and chemical properties of the reservoir rocks to understand the geological challenges faced. Next, existing drilling techniques are evaluated and analyzed in the context of a particular production field. The results of this analysis are the basis for developing an integrative model that combines aspects of geology and drilling techniques.Through this approach, this research aims to identify potential improvements in drilling strategies that could significantly increase production. Simulation and modeling results illustrate the positive impact of implementing optimized drilling strategies on production efficiency and hydrocarbon recovery. The conclusions of this research provide a new perspective on the importance of integration between geological science and drilling techniques in achieving efficient production goals. It is hoped that these findings will provide practical guidance for the production geology industry to increase the sustainability of oil and gas production.  

Secara administratif Bendungan Pamukkulu terletak pada Desa Kale Ko’mara, Kecamatan Polombangkeng Utara, Kabupaten Takalar, Provinsi Sulawesi Selatan. Litologi pada Bendungan termasuk Formasi Batuan Gunungapi Baturape-Cindako yaitu lava dan breksi beserta retas-retas andesit. Metode penelitian berupa pemetaan permukaan dan pengeboran inti batuan. Berdasarkan investigasi geologi bawah permukaan, kelas batuan yang sesuai zonasi 3B yaitu pada Blok B1 (10-20m), Blok A3 (5-10m), dan Blok D (5-20m) dengan kelas batuan CH. Untuk zona 3A dengan kelas batuan CM terdapat pada Blok A3 (10-15m), Blok B1 (5-10m), dan Blok D (0-5m) dan zona 3C terdapat pada Blok A3 (1-5m), Blok B1 (5-10m), dan Blok D (0-5m) dengan kelas batuan CM. Dari hasil uji laboratorium mekanika batuan nilai Uji Kuat Tekan antara 33.36 MPa–67.24 MPa hal ini menunjukkan batuan memiliki nilai kekerasan dan kekuatan berkisar dari sedang sampai keras. Nilai Rock Quality Designation (RQD) pada lapisan atas 0-10m berkisar 13-68% dan lapisan 10-20m berkisar 83-99%. Analisis Fragmentasi batuan hasil blasting rata-rata boulder batuan berukuran 100cm ialah 18.74%. Rekomendasi dalam pembangunan bendungan pada area quarry yaitu perlunya penyesuaian blasting plan terhadap faktor-faktor geologi yang terdapat dilapangan agar fragmentasi dapat tercapai dengan baik.

Keerom Regency is one of the areas that has the potential for Batugamping mineral resources which is quite potential, this is evidenced by the existence of several mining business actors who are carrying out mining activities in the area. Based on the geological map of the Jayapura sheet (Taritatu Sheet) the distribution of limestone potential is quite evenly distributed in the Keerom Regency area. The distribution of limestone potential in Keerom Regency is spread in the Arso 1, Arso 4, Arso 10, Arso 13 areas to Senggi. Based on the results of the initial survey, mining activities in Keerom Regency have not been managed properly, because some mining sites have carried out mining activities but do not yet have legality, namely a mining permit (SIP), do not have a good and correct mine processing plan based on the mining stages, there are still locations where limestone is not yet known distribution, volume and even the amount of resources and reserves. The potential for limestone is a good investment opportunity if it is developed into a community mine that can provide added value to the community. Therefore, it is necessary to have geological mapping activities and also the calculation of resource values. In this case, it concerns the quantity and quality of deposits to be able to provide information as a mineral database for the community as land owners and is also very useful for the Keerom Regency government. This research aims to determine the amount of limestone volume which can later be used as data base information during mining activities. The research also utilized the Surfer 11 application for the creation of topographic maps and to calculate the number of limestone volumes. The research method that will be carried out is the Cross Section Method which is a special method for types of rock minerals.

Morphotectonics is a major factor in controlling the development of landforms and has an influence on river systems in the Ereunpalay area and its surroundings. This study uses a quantitative method, starting with a broad perspective and then moving on to a more focused and targeted approach. This tectonic geomorphological analysis uses several morphometric parameters, such as: Drainage Density (Dd), Bifurcation Ratio (Rb), Valley Floor Width to Valley Height Ratio (Vf), Mountain Front Sinousity (Smf), Hypsometric Curve and Hypsometric Integral (HI), and the Tectonic Activity Index (IAT). From the results of IAT calculations, it is found that the Ereunpalay area and its surroundings are in class one to three tectonic activities or commonly called moderate to very high class. The flow pattern of the river that dominates the study area is a parallel flow pattern which is controlled by the geological structure. Based on the results of the morphotectonic analysis, it was found that the Ereunpalay area and its surroundings have a morphological shape that is influenced by tectonic activity in the form of faults and folds.

Indonesia and Malaysia are two countries that have historically disputed with each other. One of the disputes between Indonesia and Malaysia is the Ambalat Block boundary dispute. The Ambalat Block is a sea area of ​​15,235 square kilometers which is in the Sulawesi Sea or the Makassar Strait. The Ambalat Block is estimated to contain oil and gas that can be utilized for decades to come. Ambalat, is near the border line of Indonesia and Malaysia. In this area as a fishing area in Sebatik waters. This water area is recorded to be rich with potential for reef and demersal fish. Ambalat is not only rich in fish potential. This area, which is located in North Kalimantan, has long been a dispute between Indonesia and Malaysia. One of them, because it has the potential of oil and natural gas. Geological Survey Center - Geological Agency of the Ministry of Energy and Mineral Resources (ESDM) has identified this potential. Based on G&G study data around the East Ambalat area, this potential is in the Tarakan basin and its surroundings. The naming of the marine block contained in the Ambalat block is based on the interests of exploring marine and underwater wealth, especially in the oil mining sector. Tensions between Indonesia and Malaysia are increasing due to the ownership claims of each country over the Ambalat block area, the Ambalat block area which is now a dispute between the States of Indonesia-Malaysia is not a land area but is located at a sea depth of 2500 meters on the continental shelf geographically, block Ambalat is a natural continuation of the Indonesian Kalimantan mainland which is in the Tarakan Basin spreading area which has the potential as oil and gas.

Keerom Regency is one of the areas that has the potential for Batugamping mineral resources which is quite potential, this is evidenced by the existence of several mining business actors who are carrying out mining activities in the area. Based on the geological map of the Jayapura sheet (Taritatu Sheet) the distribution of limestone potential is quite evenly distributed in the Keerom Regency area. The distribution of limestone potential in Keerom Regency is spread in the Arso 1, Arso 4, Arso 10, Arso 13 areas to Senggi. Based on the results of the initial survey, mining activities in Keerom Regency have not been managed properly, because some mining sites have carried out mining activities but do not yet have legality, namely a mining permit (SIP), do not have a good and correct mine processing plan based on the mining stages, there are still locations where limestone is not yet known distribution, volume and even the amount of resources and reserves. The potential for limestone is a good investment opportunity if it is developed into a community mine that can provide added value to the community. Therefore, it is necessary to have geological mapping activities and also the calculation of resource values. In this case, it concerns the quantity and quality of deposits to be able to provide information as a mineral database for the community as land owners and is also very useful for the Keerom Regency government. This research aims to determine the amount of limestone volume which can later be used as data base information during mining activities. The research also utilized the Surfer 11 application for the creation of topographic maps and to calculate the number of limestone volumes. The research method that will be carried out is the Cross Section Method which is a special Method for types of rock minerals        

Geothermal energy is a renewable energy source that can be used to generate electricity, heat homes and businesses, and provide hot water for industrial processes. The interior of the Earth is hot, and this heat can be transferred to the surface through geological structures such as faults, fractures and sedimentary basins. These structures provide pathways for geothermal fluids to flow, and they can also trap these fluids, creating geothermal reservoirs. The type and size of geological structures that affect geothermal energy can vary depending on the location. For example, in some areas, faults and fractures are the most important structures, while in other areas, sedimentary basins are the most important. The distribution of these structures also plays a role in determining the potential for developing geothermal energy. The study of geological structure is very important to understand the distribution and potential of geothermal energy resources. By understanding how these structures influence the circulation and accumulation of geothermal fluids, we can develop and better manage these resources. This abstract provides a brief overview of the topic of geothermal energy and the role of geological structures in this field. It is intended to provide a starting point for further research and discussion.

Kabupaten Keerom merupakan daerah yang sebagian besar wilayahnya digunakan untuk pertanian dan perkebunan. Dikarenakan oleh penggunaan lahannya, dibutuhkan air dalam jumlah yang sangat banyak. Salah satu sumber air yang dapat menunjang baik sebagai penyediaan air baku maupun irigasi adalah Air Tanah. Air Tanah merupakan sumber air yang yang tidak dapat kita lihat, tetapi dapat kita prediksi keberadaannya. Beberapa metode untuk dapat menentukan posisi atau keberadaan Air Tanah adalah dengan menggunakan Geolistrik. Metode lainnya yang dapat dilakukan adalah dengan melakukan analisis Sistem Informasi Geografis dengan beberapa data-data pendukung untuk dapat menentukan lokasi yang memiliki potensi air tanah. Data yang dijadikan sebagai parameter dalam membuat peta potensi air tanah adalah data curah hujan rerata tahun 2017-2021, data geologi kabupaten keerom, data kemiringan lereng dan data tutupan lahan. Dari hasil analisis tersebut didapatkan hasil bahwa Kabupaten Keerom memiliki potensi air tanah yang tinggi yaitu 15,46 % berpotensi sangat tinggi dan 36,44% berpotensi tinggi.

Batuan merupakan kumpulan dari beberapa jenis mineral. Setiap mineral terdiri dari berbagai ion-ion atau unsur-unsur tertentu. Ion atu unsur-unsur ini dapat diextrak melalui proses pengolahan atau metalurgi yang bermanfaat sebagai bahan industri, baik industri kimia, manufactur, industri kesehatan, maupun industri bahan peledak. Penelitian ini merupakan kelanjutan perluasan penelitian tahun lalu, dimana pengambilan sampel dilakukan secara random di beberapa titik daerah Jayapura yaitu daerah Koyakoso dan sekitarnya. Metode pengambilan sampel dilakukan dengan cara pengambilan batuan yang masih segar dengan berat sekitar 2 Kg setiap titik. Titik pengambilan sampel sebanyak 6 titik dimana jarak antar titik sekitar 25 meter dengan titik pengambilan mengarah pada daerah perbukitan. Sampel yang telah diambil akan dibawa ke laboratorium untuk dilakukan analisa. Sampel terlebih dahulu dibersihkan dari kotoran-kotoran yang menempel seperti debu dan tanah,kemudian di gerus sampai ukuran 15 mesh, kemudian sampel hasil penggerusan di analisa dengan menggunakan mikroskop polarisasi untuk mengetahui sifat-sifat fisik batuan. Hasil dari sifat fisik batuan ini kemudian di interpretasi untuk mengetahui kandungan mineral-mineral yang terdapat pada batuan yang akan dikorelasikan dengan kandungan mineral yang tertera pada peta geologi regional lembar jayapura, dan hasil pengujian XRD terdahulu sebagai perbandingan. Hasil dari pengujian sifat fisik  batuan  ini langsung menunjukkan jenis kandungan mineral.

Indonesia merupakan negara kepulauan yang memiliki beragam potensi bencana, ditinjau dari aspek geografis, klimatologis dan demografis. Negara kita terletak diantara dua samudera (Samudera Indonesia dan Samudera Pasifik) dengan jumlah pulau lebih kurang sebanyak 17.000 pulau yang kaya potensi alam, hutan, laut, bahan tambang- mineral dan sekaligus kerawanan bencana. Dari  aspek geologis,  terletak  pada tiga (3) lempeng utama, yaitu Lempeng Eurasia, Lempeng Indo-Asutralia dan Lempeng Pasifik yaang menjadikan   kaya   cadangan mineral dan sekaligus memiliki potensi bencana gempa, tsunami dan tanah longsor. Selain itu, terdapat puluhan gunung berapi yang masih aktif dan berpotensi meletus dan menimbulkan bencana gunung berapi tetapi juga memebrikan kesuburan lahan dan potensi alam yang beragam. Sedangkan secara klimatologis memiliki potensi bencana angin ribut/puting beliung, gelombang pasang naik di  wilayah pesisir/rob, perubahan iklim, banjir  dan kekeringan yang berdampak pada berbagai  bidang kehidupan masyarakat. Dengan kondisi tersebutperlu dilakukan kajian analisis resiko bencana sebagai upaya untuk mengantisipasi dan menanggulangi resiki-resiko yang muncul akibat bencana alam. Urusan bencana ada urusan kita semua oleh karena itu partisipasi dan keterlibatan semua unsur baik pemerintah, masyarakat, dunia usaha dan stakeholder lainnya perlu ditumbuhkan dan dioptimalkan, Dengan peran serta semua pihak diharapkan Indonesia menjadi negara yang Tangguh dalam menghadapi bencana alam.

Apa yang dimaksud dengan Expert System atau dalam bahasa Indonesianya disebut dengan sistem pakar, adalah suatu aplikasi komputer yang memiliki knowledge, experience dan judgmen of skilled proffesionals. Expert system (selanjutnya disebut ES) akan memberi saran- saran keputusan dan kadang-kadang dapat juga memberikan alasan-alasan terhadap rekomendasi yuag diberikannya. Aplikasi ES yang ada saat ini, meliputi mulai aplikasi yang kompleks sampai aplikasi yang relatif sederhana. Di dalam ES, akan digunakan specialized symbolic reasonic untuk menyelesaikan rnasalah yang sulit secara baik. Dengan kata lain ES akan : 1. Menggunakan spesialized knowledge tentang permasalahan secara partikular (seperti geologikal analisis, konfigurasi komputer) daripada pengetahuan calculation. 2. Menggunakan symbolic reasonic daripada numerical calculation 3. Melakukan tindakan dalam tingkatan yang lebih baik daripada non-expert humans. Aplikasi-aplikasi tersebut digunakan oleh pengguna (user) yang tidak expert (non-expert) untuk mendapatkan rekomendasi atau saran-saran tentang permasalahan yang dihadapi. ES juga digunakan oleh para ahli sebagai knowledge assistant. Dan diharapkan, suatu aplikasi ES dapat memberikan fungsi yang lebih baik dari seseorang human expert dalam pemberian keputusan (udgments making) dalam suatu permasalahan yang spesifik.