Relokasi Gempa Menggunakan Metode Double Difference Studi Kasus Wilayah Banten.

Abstract

Deya Isma Wardhani. 101118017. Earthquake Relocation Using Double Difference Method Case Study in Banten Region. Banten Province is part of a divergent movement between the Indo-Australian Oceanic Plate which subducts under the Eurasian (Europe-Asia) continental plate. The Indo-Australian Ocean Plate is moving northwards, colliding with the Eurasian Continental Plate. The earthquake that occurred on January 14 2022 in Banten with a magnitude of 5.7 and a depth of 72 km was identified as an earthquake caused by a subduction lineation. Earthquake relocation is necessary to obtain accurate hypocenter results for analysis of tectonic conditions. The hypocenter relocation used in this study is the double difference method which utilizes the travel time of the earthquake pair to the station. The damping value test and several velocity models are also used to obtain the best relocation results. The best results were obtained using the MAXDIST 300, MAXSEP 50 and damping 25 parameters with the AK-135 speed model. Keywords: Hypocenter relocation, subduction lineage, double-difference, velocity model.