ESTIMATED VALUE OF THE ATTENUATION FUNCTION IN BATANG TORU SOUTH TAPANULI NORTHERN SUMATERA BASED ON STRONG MOTION ACCELERATION DATA

• Main Author: Ghina A. F. Saadjad, Fauziyah
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/71901
• Institution: Institut Teknologi Bandung

The island of Sumatra is one of the areas in Indonesia that is vulnerable to earthquake hazards, this is due to the tectonic setting of the Sumatra region which is influenced by various subduction zones in the Sunda Trench (Sunda Megathrust), the Sumatran fault and the Mentawai fault. Some of the damaging earthquake events that have hit the Sumatra region include the December 26, 2004 earthquake in Sumatra – Andaman (Mw 9.3) and the March 28, 2005 earthquake in Nias (Mw 8.6). The potential risk of earthquakes in the Sumatra Island region is influenced by the presence of several important infrastructures such as dams and population. For this reason, it is necessary to pay more attention to the level of earthquake risk. One of the efforts to reduce earthquake risk is to determine the value of the attenuation function (attenuation relationship). In this study, estimation of the value of the attenuation function (attenuation relationship) in Batang Toru, South Tapanuli, North Sumatra was carried out using Strong Motion Acceleration (SMA) data, and observed Peak Ground Acceleration (PGA) values or PGA on the surface, as one of the parameters. can describe a strong ground motion (strong motion). The results of this study are the observed PGA values or PGA on the surface, graphs of PGA predictions with observational PGA and attenuation relationships for the Batang Toru region, South Tapanuli, North Sumatra