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All Journal Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan JGE (Jurnal Geofisika Eksplorasi) Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Journal of Geoscience, Engineering, Environment, and Technology Journal of Engineering and Scientific Research (JESR) Jurnal Geofisika Yumary: Jurnal Pengabdian kepada Masyarakat Jurnal Riset Fisika Indonesia Jurnal Teknik dan Teknologi Indonesia
Hesti Hesti
Universitas Lampung
Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences Other

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PEMODELAN TSUNAMI BERDASARKAN AMPLITUDO MAKSIMUM HISTORIS GEMPABUMI DI PESISIR JAILOLO SELATAN Achmad, Rahim; Taib, Suryani; Ningrum, Rohima Wahyu; Suryanto, Wiwit; Aswan, Marwis; Salam, Ramdani; Amelia, Risky Nuri; Hesti, Hesti; Wahidin, Nurhalis
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.v9i3.338

Abstract

Pangkalan data paleo-tsunami Indonesia mencatat tanggal 28 Juni 1859 terjadi gempabumi kuat di Laut Maluku dengan skala intesitas (MMI) IX dan menyebabkan tsunami di Teluk Sidangoli dengan ketinggian 10 meter. Laut Maluku memiliki pengaruh yang signifikan terhadap potensi terjadinya bencana tsunami di sekitar wilayah Halmahera termasuk Jailolo Selatan. Melihat adanya potensi bencana tsunami yang besar di wilayah Jailolo Selatan, maka perlu dilakukan strategi perencanaan mitigasi bencana tsunami yakni dengan pemodelan bahaya tsunami. Pemodelan bahaya tsunami dilakukan untuk mengetahui nilai amplitudo maksimum (Run-up) gelombang tsunami dengan menggunakan perhitungan numerik dari sofware Cornell Multi-Grid Coupled Tsunami Model (COMCOT) versi 1.7, nilai jarak maksimum yang dapat ditembus oleh air pasang ke daratan pada pantai yang datar (inundasi), dan nilai sudut kemiringan lereng (slope) dari pengukuran fotogrametri udara Unmanned Aerial Vehicle (UAV). Hasil Pemetaaan bahaya tsunami menghasilkan nilai amplitudo maksimum (Run-up) setinggi 4 meter dan wilayah yang terdampak akibat gelombang tsunami berjarak (inundasi) sekitar 310 meter dari garis pantai. Nilai rata-rata sudut kemiringan lereng (slope) di pesisir Jailolo Selatan adalah 22,90 dan termasuk lereng curam. Dan slope tipe curam cenderung menyebabkan peningkatan tinggi gelombang saat tsunami mendekati pantai, sehingga gelombang dapat menjadi lebih tinggi.
Identification of Deep Groundwater Aquifer Zones with Geoelectrical Method in Sukadanaham Area Bandar Lampung, Indonesia Haerudin, Nandi; Rizkiano, Aldika; Mulyasari, Rahmi; Hesti
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 1 (2024): JGEET Vol 09 No 01 : March (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.1.13948

Abstract

Research on groundwater aquifers using the geoelectric method has been carried out in the Sukadanaham area, Tanjung Karang Barat District, Bandar Lampung City. This Research Objectives This research aims to identify the lithology and depth of groundwater aquifer zones based on resistivity values ​​and geological literature. Data acquisition was carried out using the Schlumberger configuration of 3 points in the young Betung volcanic formation (Qhvb). The data used is the resistivity value. Resistivity value data is modeled vertically with inverted results. The resistivity value of each point is adjusted and interpolated based on the literature on rock resistivity values. Based on the identification results, 4 types of subsurface rock lithology were found, namely top soil, tuff, breccia, and andesite. The lithology of the layers at point 1, point 2 and point 3 is dominated by tuff and breccia layers. The resistivity value of the andesite layer obtained has a high value, which is > 300 Ωm. The resistivity value of the tuff layer for the waterproof layer has a value of 200-250 Ωm. The breccia layer acts as a groundwater aquifer zone with a low resistivity value of 15-60 Ωm. The rock resistivity value with the lowest value is at a depth of 40-95 m which is a compressed aquifer layer with andesite and tuff layers as a waterproof layer above and below.
Distribusi Frekuensi-Magnitudo Gempa Mikro Akibat Aktivitas Stimulasi Hidrolik pada Lapangan Panas Bumi Tipe Hot Dry Rock (HDR) Nanda Hanyfa Maulida; Muhamad Firdaus Al Hakim; Hesti; Suharno
Jurnal Teknik dan Teknologi Indonesia Vol. 1 No. 3 (2023): Desember : Jurnal Teknik dan Teknologi Indonesia (JTTI)
Publisher : Arsil Media

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62287/jtti.v1i4.67

Abstract

A series of hydraulic stimulations were conducted to enhance permeability and increase the production of hot fluid in a Hot Dry Rock (HDR) geothermal field. The stimulation involved injecting water into the hot rock, inducing hydraulic fracturing and resulting in over 2000 micro-earthquake events within the field. Utilizing existing microearthquake data, an analysis of the microearthquake distribution was performed, along with calculating the gradient of the frequency-magnitude distribution of microearthquakes (b-value) to assess the heterogeneity conditions induced by high pore pressure. The hypocenter distribution is centered around injection and production locations, displaying a trend that aligns with the main structure trending southwest to northeast. The mapping of b-values indicates elevated values in the hydraulic stimulation area, believed to be associated with increased pore pressure resulting from the higher fluid volume in that region. Moreover, high b-values were identified beneath the production area, suggesting the potential migration of injection fluid from the hydraulic stimulation process.
Co-Authors Achmad, Rahim Akroma Hidayatika Akroma Hidayatika Amelia, Risky Nuri Angelia Eka Salsabillah Arif P Prabowo Aswan, Marwis Darmawan, I Gede Boy Deno Ratu Alam Dersan Surya Effendi Dini Hardilla Djoko Wintolo Hadi Prayitno I Gede Boy Darmawan Ida Bagus Suananda Yogi Idabagus S Yogi Juliarka, Bella Restu Muhamad Firdaus Al Hakim Nanda Hanyfa Maulida Nandi Haerudin Rahayu Lestari Rahmi Mulyasari Ramdani Salam Rezky Ariya Dwiguna Rinda Ermana Rizal Khairudin Rizkiano, Aldika Rohima Wahyu Ningrum, Rohima Wahyu Subagyo Pramumijoyo Sugeng Purwo Saputro Sugeng Purwo Saputro Suharno Suharno Suharno Suryanto, Wiwit Syamsurijal Rasimeng Taib, Suryani Wahidin, Nurhalis