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All Journal Jurnal Fisika FLUX Progressive Physics Journal
Nasution, Jihan Syafina
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Astronomy Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Health Professions Materials Science & Nanotechnology Physics

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Analysis of Hypocenter Position of Bengkulu Earthquake on April 15, 2023 Using 2D and 3D Grid Search Method Based on USGS Data Sidik, Firdos Bahar; Khumairo, Savira Zahrul; Pangestu, Farizki Budi; Sakinah, Triya Illmi; Febrian, Muhamad Raihan Putra; Laksono, Risaldi Fauzan; Nasution, Jihan Syafina
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 21, No 3 (2024): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v21i3.21112

Abstract

Earthquakes are natural events that can have serious impacts on human life and the environment. This study aims to improve the accuracy of earthquake hypocenter determination by applying the 2D dan 3D Grid Search method to seismic data recorded by three stations in the Bengkulu area, Indonesia. The analysis process begins with P and S wave phase picking using seismograv software, followed by origin time determination using the Wadati diagram method. The 2D dan 3D Grid Search method was used to calculate the position of the earthquake hypocenter by dividing the search area into grids and searching for the smallest RMS value. The results of the relocation calculation obtained the hypocenter point of the earthquake at latitude 4.50°N, longitude 76.0340°W with a depth of 60 km. Although there are differences with USGS data, the level of agreement of the calculation results is relatively high. This research contributes to further understanding of earthquakes in the study area and can be the basis for improving disaster mitigation.
Aplikasi Sistem Informasi Geografis (SIG) Untuk Pemetaan Tingkat Kerawanan Longsor Di Kota Bandar Lampung Nasution, Jihan Syafina
Progressive Physics Journal Vol. 6 No. 2 (2025): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/wz2c4f62

Abstract

The research entitled "Geographic Information System (GIS) Application for Landslide Prone Level Mapping in Bandar Lampung City" is motivated by data obtained from BPBD in 2018, there are at least 15 sub-districts in Bandar Lampung which are indicated as landslide-prone areas because they have hills and valleys that are quite dangerous. For this reason, it is necessary to create a landslide prone zone map to produce information about the position related to the level of landslide vulnerability in the city of Semarang. This map can be used as a reference material in decision making to prevent landslides in vulnerable areas, thus reducing the number of casualties and material as well as planning in the development of facilities and infrastructure. This research uses remote sensing image data and GIS (Geographic Information System) by weighting the parameters that affect landslide occurrence, namely: slope, land cover, soil type, and rainfall. The result of this research is a landslide vulnerability map divided into 4 vulnerability classes, namely: low, medium, high, and very high. And the information obtained from the 4 factors, the potential for landslides in Bandar Lampung City is divided into 4 characteristics of landslide prone zones, namely low level zones in 7 sub-districts, medium level in 9 sub-districts, high level in 5 sub-districts, and very high level in 7 sub-districts.
Co-Authors Febrian, Muhamad Raihan Putra Khumairo, Savira Zahrul Laksono, Risaldi Fauzan Pangestu, Farizki Budi Sakinah, Triya Illmi Sidik, Firdos Bahar