M. Sarkowi, L. Damayanti, V.A. Rosadi, A.H. Pinandita, Fajriyanto, R.N. Hendrawan, A. Wibowo, R.C. Wibowo
Bandar Lampung City, as the capital of Lampung Province, is crossed by several faults, such as the Lampung-Panjang fault, Menanga, and other minor faults. Fault activity is characterized by seismic activity in Bandar Lampung City and its surroundings from 1930 to 2024, which is spread across four locations, such as the Tarahan area (Lampung-Panjang fault), Padang Cermin area (Menanga fault), East of Mount Pesawaran and Lampung Bay. Based on this, the purpose of this study is to identify the existence of faults around the city of Bandar Lampung using gravity data analysis as an initial step in geological disaster mitigation. The data used are GGMPLUS satellite gravity data of 61,472 points, topographic data (DEM), and surface geological data. The data processing carried out includes gravity data correction to obtain gravity anomalies, spectrum analysis to obtain regional and residual anomaly depths, gravity anomaly filtering to obtain regional and residual gravity anomalies, residual gravity anomaly gradient analysis to obtain the presence of faults, and inversion modeling to obtain fault continuity patterns below the surface. The gravity anomalies in the Bandar Lampung area and its surroundings range from 40 to 120 mgal, with low anomalies in the central part extending from southeast to northwest, while high anomalies are in the Southwest and East. The separation of Bouguer anomalies using a moving average filter with a window width of 8 km shows that the Lampung-Panjang fault still appears on the regional anomaly contour so that the Lampung-Panjang fault is not only on the surface but continues to the depth. There is also a low anomaly contour in the North heading southwest-northeast in the Tegineneng area, which correlates with faults in the area. The results of inversion modeling show that in addition to the Lampung-Panjang and Menanga faults, there are also faults trending SW-NE in the waters of Lampung Bay and SE-NW to the west of the Lampung-Panjang fault. These faults continue from a depth of 5 km to 10 km. These faults must be a concern for related agencies, and further study is needed to reduce the risk of infrastructure damage and loss of life. © Published under licence by IOP Publishing Ltd.
Geophysics Engineering Department, Faculty of Engineering, Universitas Lampung, Sumantri Brojonegoro Street No.1 Lampung, 35145, Indonesia; Geodetic Engineering Department, Faculty of Engineering, Universitas Lampung, Sumantri Brojonegoro Street No.1 Lampung, 35145, Indonesia; Geological Engineering Department, Institut Teknologi Sumatera, Way Huwi Lampung, 35365, Indonesia; BMKG North Lampung, Lampung, Indonesia; Geological Engineering Department, Faculty of Engineering, Universitas Lampung, Sumantri Brojonegoro Street No.1 Lampung, 35145, Indonesia
Research at a Glance
Register to unlock
Topics & SDG Alignment
Register to unlock
Collaboration
Register to unlock
Author Profile (Selected)
Register to unlock
References Overview
Register to unlock
Journal & Source
Register to unlock
Metadata & Integrity
Register to unlock