Kappa Journal
Vol 8 No 1 (2024): Kappa Journal

Metode Double-Difference Untuk Merelokasi Hiposenter Gempabumi Susulan Seririt Singaraja

Winardi Tjahyo Baskoro (Universitas Udayana)
I Gde Antha Kasmawan (Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana)
I Ketut Putra (Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana)
Ni Nyoman Ratini (Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana)
Sismanto (Departemen Fisika, Laboratorium Geofisika, Universitas Gadjah Mada, Yogyakarta)



Article Info

Publish Date
30 Apr 2024

Abstract

A method that does not require a main earthquake (master event) that can be used simultaneously to relocate a very large number of earthquakes with wide hypocenter separation is called the double-difference method. A method used to relocate the aftershocks in Seririt Singaraja on November 14 2019 with coordinate positions 113.478 – 115.181 East Longitude and 8.357 – 7.894 South Latitude. The earthquake data used in this research was accumulated from 85 BMKG seismic stations. Data analysis uses cross-correlation time differences which can increase the accuracy of travel time between the receiving station and the earthquake, thereby reducing errors in calculations. The double difference method used to relocate the earthquake in the Seririt Singaraja area showed that there was a shift in the location of the earthquake hypocenter before and after it was relocated. Horizontally and vertically, the distribution of earthquake hypocenters before and after being relocated occurs when there is a collection of location shifts. The results of this research were able to relocate 152 aftershocks properly. The main earthquake after being relocated was at a depth of 17 km, while the distribution of aftershocks was at a depth of around 6-25 km, so that it can more accurately describe the position of the earthquake source and is able to show clearer and easier to interpret structural patterns.

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Journal Info

Abbrev

kpj

Publisher

Subject

Astronomy Physics Other

Description

Kappa Journal (e-ISSN 2549-2950) mempublikasikan artikel hasil-hasil penelitian fisika, inovasi pembelajaran fisika, dan pemikiran-pemikiran kritis tentang fisika maupun pendidikan fisika. Kappa Journal diterbitkan oleh Universitas Hamzanwadi dua kali setahun yakni setiap bulan Juni dan ...