Satya Pratama, Reynaldi (2025) Analisis Geomorfologi Tektonik Dan Seismisitas Daerah Solok Hingga Bukittinggi Dan Sekitarnya Provinsi Sumatra Barat. Other thesis, Universitas Islam Riau.

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Abstract

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, on December 26 2004. However, until now there is no Seismicity Map, Earthquake Scenario Map and Tectonic Geomorphology Map available. 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 Solok to Bukittinggi, West Sumatra. The research method used is to combine secondary data (GeomapApp) together with primary data obtained from recording tectonic geomorphology data in the field. 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 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 facets, river bends with an average of 0.2 km, surface rupture, landslides and waterfalls. 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 are not shown at all in the GeoMapApp software include fault parameters including: Sumpur-Cambai Fault (SCF), Lubuaksikaping-Baroe Fault (LBF), Sabu Suku Fault (SSF), Solok-Muaropaneh Fault (SMF), and Panyalaian Batipuh Fault (PBF). Potential large Moment magnitude earthquake in the future will originate from the Sumpur-Cambai Fault (SCF), approximately 7.1 Mw. Meanwhile, the smallest comes from the Panyalaian-Batipuh Fault (PBF), approximately 6.4 Mw. The Solok Valley is the largest valley formed in the research area caused by the movement of two main faults, namely the Sumpur-Cambai Fault (SCF) and the Selayo-Muaropaneh Fault(SMF). Keywords: Tectonic Geomorphology, Earthquake Scenarios, Seismicity, Moment Magnitude, Solok, Bukittinggi

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