Thorik Muhammad, Agil (2025) Investigasi Geomorfologi Tektonik Pengaruh Patahan Utama Daerah Bukittinggi Hingga Durian tinggi Provinsi Sumatra Barat. Other thesis, Universitas Islam Riau.

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Abstract

The subduction of the Indian Ocean Plate and the Sunda Plate caused the deformation of the island of Sumatra, resulting in a large earthquake and the most powerful 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 Map Tectonic Geomorphology on the Island of Sumatra in general and West Sumatra in particular. This is the main motivation for the author to provide information that is useful and easy for the public to understand regarding tectonic developments (seismicity, scenarios, tectonic geomorphology) of earthquakes, from Bukittinggi to Durian tinggi, West Sumatra. The research method used is to combine secondary data together with primary data obtained from recording tectonic geomorphology 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 (GlobalMulti-Resolution Topography). Calculation Moment Magnitude earthquake will produce an earthquake scenario map (neotectonic) using several formulas. The results of this research show several tectonic geomorphological features in the form of triangular facet, river diversion with an average of 0.3 km,River core, surface rupture and landslide. The dominant type of fault movement in the research area is right-hand strike faults (dextral). The author recommends 5 pieces Centroid Moment Tensor (CMT) which is not shown in the software at all GeoMapApp, which represents fault parameters including: Rao-Panti Fault (RPF), Lubuksikaping-Baroe Fault (LBF), Panti-Ganggomudiak Fault (PGF), Panti-Tanjuangbaringin Fault (PTF), and Taruang-Panti Fault (TPF). Potential Moment magnitude The biggest earthquake in the future comes from the Rao-Panti Fault (RPF), approximately 7.2 Mw. The Panti Valley, Lubuksikaping Valley and Kubang Putih Valley are densely populated valleys and are vulnerable to strong to major earthquakes in the future. Keywords: Tectonic Geomorphology, Earthquake Scenarios, Seismicity, Moment Magnitude, Bukittinggi, Durian tinggi

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