ANALISIS PERUBAHAN KECEPATAN LEMPENG TEKTONIK DI SELAT SUNDA BERDASARKAN PENGAMATAN GPS

• Main Author: Yovenia, Dhira
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/48372
• Institution: Institut Teknologi Bandung

Indonesia is an earthquake-prone country, it is because Indonesia traversed by four tectonic plates, namely the Indo-Australian, the Eurasian, the Philippine, and the Pacific plate. This tectonic plate meeting area is also called a subduction zone. One of the subduction zones in Indonesia is the Sunda Strait subduction zone. Based on a research conducted by Heki et al. (2013) regarding plate acceleration in Japan which states that there is a change in tectonic plate velocity after an earthquake. It is likely that this also happened in the Sunda Strait which have experienced several large earthquakes. In this thesis, the author will conduct a research to find out information on changes in tectonic plate velocity in the Sunda Strait. The data used are GPS CORS BIG observation data. Coordinate data is used to calculate the magnitude of the shift caused by an earthquake, the magnitude of the speed of the shift before and after the earthquake, and the change in velocity of each time interval. The coordinates data were first carried out by the Sundanese block rotation correction process. The results of the calculation of the horizontal shift value due to the earthquake for all stations ranged from 3.34 mm to 7.36 mm in the north direction and -27.45 mm to 0.18 mm in the east direction. Calculation of horizonarthquake and 2016 earthquake and also other tectonic factors.tal shifting speed before and after the earthquake ranged from 2.25 mm / year to 12.60 mm / year and 1.80 mm / year to 13.35 mm / year. This shows the change in velocity before and after the earthquake. The pattern of change in velocity is likely due to post-seismic deformation from the 2012 e