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All Journal JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal)
Rhamadhana Sultan
Institut Teknologi Bacharuddin Jusuf Habibie
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Physics Public Health

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Analisis Mekanisme Sumber Gempa Mikro di Lapangan Panas Bumi Wayang Windu, Kecamatan Pangalengan, Kabupaten Bandung, Jawa Barat untuk Prediksi Zona Permeabilitas Rhamadhana Sultan; Sulaehani Ruhmi
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 2 (2026): May
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i2.1806

Abstract

Microearthquakes in producing geothermal fields, such as the Wayang Windu geothermal field, are valuable for monitoring subsurface and reservoir conditions. This study analyzes micro seismic data recorded by seismometer stations to determine focal mechanisms and fault orientations, aiming to predict permeability zones. Moment tensor inversion was performed using the ISOLA program (MATLAB-GUI), applying a linear least-squares method based on Green’s functions and P-wave arrival times from three-component seismometers. Reliable inversion results are indicated by variance reduction values approaching unity. The results reveal both double-couple (DC) and non-DC components, including Compensated Linear Vector Dipole (CLVD) mechanisms. Non-DC sources are associated with fluid injection and increased pore pressure, while DC components indicate shear faulting. Focal mechanism solutions (beach ball diagrams) show that faults in the production area are predominantly oblique, with dips ranging from 30° to 90°, whereas the injection area is dominated by reverse faults with dips of 20° to 85°. These findings suggest that permeability zones are present in both production and injection areas, as supported by hypocenter distribution and fault orientations. Fluid movement is interpreted to trend northward, with permeability enhancement linked to fluid injection that elevates pore pressure and promotes fracture opening.  
Analisis Pengaruh Sudut Kemiringan Terhadap Efisiensi Energi pada Sistem Pembangkit Listrik Tenaga Surya Menggunakan System Advisor Model Software Muhammad Irsan; Nurul Chairunnisa Noor; Rhamadhana Sultan
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 11, No 1 (2026): Januari 2026
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v11i1.3948

Abstract

With an emphasis on Indonesia's solar energy potential, this study investigates how panel tilt angle affects energy efficiency in solar power-producing systems. Economic expansion is increasing the energy demand, which is driving a search for affordable, sustainable, and ecologically friendly renewable energy sources. Because solar power plants use sunlight to generate energy, it is crucial to design systems considering variations in sunshine intensity brought on by elements such as solar panel tilt angle. This experiment shows that adjusting the tilt angle can maximize solar energy absorption and increase conversion efficiency. By collecting meteorological data from a representative site in Makassar and conducting experiments with tilt degrees ranging from 0° to 60°, a dogmatic approach was taken. According to the results, an ideal tilt angle of 10° produces the most energy output each year, however angles between 30° and 40° work best from May to August when sunlight is at its strongest. The results show that to optimize solar energy efficiency and encourage the use of renewable energy, tilt angle modifications must be made appropriately based on seasonal variations.Keywords – Efficiency, Renewable Energy, Solar Power, Tilt Angle.
Co-Authors Muhammad Irsan Nurul Chairunnisa Noor Sulaehani Ruhmi