Relokasi Hiposenter Gempa Bumi dan Model Struktur Kecepatan 1 Dimensi Gelombang P dengan Menggunakan Metode Coupled Velocity – Hypocenter di Daerah Sulawesi Tengah dan Sekitarnya

Abstract

Sulawesi Island is composed of complex tectonic arrangements. Most earthquake activities in Sulawesi are affected by the Palu - Koro Fault and Matano Fault. Palu - Koro Fault and Matano Fault are one of the faults in Central Sulawesi. Active movement of the fault results in high earthquake activity in the region of Central Sulawesi and its surroundings. This makes the importance of earthquake parameters in Central Sulawesi and surrounding areas. One of the efforts to find out earthquake parameter information accurately is to relocate. The purpose of this study was to conduct hypocenter earthquake relocation and determine the 1-D velocity structure of P waves in Central and surrounding areas using the Coupled Velocity - Hypocenter method with Velest 3.3 software. The data used are tectonic earthquake data from November 2009 to March 2018, data recording stations, and initial speed data. The results of data processing using the Velest 3.3 software are that some of the results of the relocation are close to fault, the final Vp at a depth of 9 km is slower than the initial Vp, the correction of the station obtained in this calculation is in the interval -0.81 to +0.54.

Relocation of Earthquake Hypocenter Using Double-Difference Method in Western Part of Sumatera

“…If the fault plane or subsurface geological structure can be described by the appearance of the earthquake hypocenter, it can help identify earthquake-prone areas. Earthquake hypocenter relocation is a method used to correct or recalculate the hypocenter position in order to provide a more accurate position description [4].…”

The Implementation of Local Context Modules as an Effort for Disaster Risk Reduction (An Empirical Study in Disaster-Affected Schools)

“…On January 15, 2021, another great earthquake hit Mamuju (BNPB, 2021). These frequent quakes are owing to the island of Sulawesi is traversed by many faults and is composed of a complex tectonic setting (Azizah et al, 2019). Accordingly, earthquake occurrence will highly happen again in Central Sulawesi in the future.…”