Pramatesya, Browwigi (2025) Analisis Geomorfologi Tektonik Dan Prediksi Kekuatan Gempa Bumi Daerah Salibawan, Provinsi Sumatera Barat Hingga Tanobato, Provinsi Sumatera Utara. Other thesis, Universitas Islam Riau.

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Abstract

VINCE TO TANOBATO, NORTH SUMATRA PROVINCE SARI The subduction of the Indian Ocean Plate and the Sunda Plate caused the deformation of Sumatra, resulting in a large earthquake and the most devastating and destructive tsunami that ever occurred on this earth, namely on December 26 2004. However, ironically, until now there is no Seismicity Map, Earthquake Scenario Map and Geomorphological Map. Tectonics on the island of Sumatra in general and West Sumatra and North Sumatra. This phenomenon is the background for the author to want to research in the research area to provide information regarding the tectonic development (seismicity, scenarios, tectonic geomorphology) of earthquakes, in Lintasawan, West Sumatra Province to Tanobato, North Sumatra Province. The research method used combines secondary data together with primary data obtained from documentation of tectonic geomorphological data in the field. Some of the software used in this research includes ArcGIS, GeoMapApp, Faultkin, Iris Earthquake, using the Shuttle Radar Topography Mission base map with a resolution of 30 m and GMRT (Global Multi-Resolution Topography). Calculation Moment Magnitude An earthquake will produce a neotectonic map applying several formulas. From the results of this research, several tectonic geomorphological features were found in the form of: triangular facet, river diversion with an average of 0.3 km, river terraces, surface rupture, anticline, offset layering and landslides. The dominant type of fault movement in the research area is right-hand strike faults (dextral). The author recommends 7 pieces Centroid Moment Tensor (CMT) which are not shown at all in the GeoMapApp software include fault parameters including: Rao-Sundata Fault (RSF), Tapanuli-Sitomba Fault (TSF), Taruang-Panti Fault (TPF), Nopan-Layang Fault (NLF), Aekbanir-Panjaringan Fault (APF), Gunungbaringin-Sunpadang Fault (GSF) and Nopan-Tobang Fault (NTF). Potential Moment magnitude The biggest earthquake in the future will come from the Rao-Sundata Fault (RSF), aproximately 7.2 Mw. Meanwhile, the smallest comes from the Gunungbaringin-Sunpadang Fault (GSF), aproximately 6.6 Mw. The Panti Valley is the largest valley formed in the research area caused by the movement of two main faults, namely the Rao-Sundata Fault (RSF) and the Taruang-Panti Fault (TPF). Keywords: Tectonic Geomorphology, Earthquake Scenarios, Seismicity, Moment Magnitude, Salibawan, Tanobato

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