TOMOGRAFI SEISMIK LOKAL UNTUK STRUKTUR BAWAH PERMUKAAN DENGAN MENGGUNAKAN DATA GEMPA ISC (STUDI KASUS : SUMATERA BARAT DAN SEKITARNYA)

APRILLIA, ISFI and Khakim, Mokhamad Yusup Nur and Poerwono, Pradanto (2021) TOMOGRAFI SEISMIK LOKAL UNTUK STRUKTUR BAWAH PERMUKAAN DENGAN MENGGUNAKAN DATA GEMPA ISC (STUDI KASUS : SUMATERA BARAT DAN SEKITARNYA). Undergraduate thesis, Sriwijaya University.

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Abstract

Seismic tomography was applied to estimate subsurface structures West Sumatera. Based on anomalies of P- dan S-wave velocity (Vp and Vs) and Vp-Vs ratio. Earthquake data were downloaded from ISC (International Seismological Center) website from January 1, 1900 to August 31, 2021. Earthquake events with a minimum of 3 phase were selected for tomography input. Seismic velocity models and source parameters were estimated by using a local earthquake tomography algorithm consisting of source relocation and tomographic inversion. A checkerboard test was also conducted to evaluate horizontal and vertical resolutin. Based on the results seismicity occurred in the Sumatran subduction zone which is descanding the Indo-Australian plate beneath the Eurasian plate. In addition, Mentawai faults and Semangko faults can be identified triggering earthquakes in the West Sumatera region.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Gempa bumi, tomografi seismik, Sesar Semangko, Sesar Mentawai
Subjects:	Q Science > QE Geology > QE521-545 Volcanoes and earthquakes
Divisions:	08-Faculty of Mathematics and Natural Science > 45201-Physics (S1)
Depositing User:	Isfi Aprillia
Date Deposited:	13 Jan 2022 04:30
Last Modified:	13 Jan 2022 04:30
URI:	http://repository.unsri.ac.id/id/eprint/61146

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