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Identification of the Semangko Fault in Sumatra, Indonesia,based on gradient gravity data analysis |
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| รหัสดีโอไอ | |
| Creator | 1. Muh Sarkowi 2. Rahmi Mulyasari 3. I Gede Boy Darmawan 4. Rahmat Catur Wibowo |
| Title | Identification of the Semangko Fault in Sumatra, Indonesia,based on gradient gravity data analysis |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2565 |
| Journal Title | Songklanakarin Journal of Science an Technology (SJST) |
| Journal Vol. | 44 |
| Journal No. | 6 |
| Page no. | 1503-1509 |
| Keyword | gravity gradient, hazard mitigation, Lampung, Semangko Fault |
| URL Website | https://sjst.psu.ac.th/ |
| ISSN | 0125-3395 |
| Abstract | The Semangko Fault (SF) is a major active fault that extends across from Aceh (in northern part) to Lampung Province(in southern part) of Sumatra Island, contributing to much deformation and high seismicity along the fault. The fault affects apattern in the density of surrounding rocks and can be identified by the gravity method. This research aimed to determine thefault structure using gravity gradient analysis in the Lampung area. Bouguer anomalies were analyzed from satellite gravity dataand gravity gradient calculation, for fault structure identification around SF. Based on the Bouguer anomalies and gravitygradient analysis (first and second-order horizontal derivatives), SF trends NW-SE. The SF is divided into two sides at the Suoharea, West and East SF sides across to Semangko Bay. That trend is confirmed with geological and topographical data analysis.These findings suggest that gravity anomaly data and horizontal gravity gradient analysis can be used to determine and identifythe presence of the SF. The seismic hazard assessments can mitigate hazards to all people in the vicinity of the SF area. |
