Analisis Coulomb Stress Gempa Bumi Deli Serdang 16 Januari 2017

Abstract

AbstrakGempabumi darat dengan magnitudo M 5,6 mengguncang wilayah Deli Serdang, Sumatera Utara pada 16 Januari 2017. Tujuan penelitian ini adalah mengetahui perubahan Coulomb stress gempabumi Deli Serdang. Analisis perubahan nilai Coulomb stress dilakukan untuk menunjukkan pengaruh gempabumi utama terhadap gempabumi susulannya. Data mekanisme sumber gempabumi diperoleh dari Global Centroid Moment Tensor (GCMT) dan German Research Centre for Geosciences (GFZ). Distribusi gempabumi utama dan gempabumi susulan sebelumnya telah direlokasi menggunakan metode Modified Joint Hypocenter Determination (MJHD). Data yang digunakan untuk merelokasi hiposenter adalah data waktu tiba fase gelombang primer dan sekunder. Data tersebut diperoleh dari Badan Meteorologi Klimatologi dan Geofisika (BMKG) dengan rentang waktu 16 Januari 2017 -30 Januari 2017.. Kata-kata kunciPerubahan Coulomb stress, relokasi MJHD, gempabumi Deli Serdang. AbstractEarthquake magnitude M 5,6 shaken around Deli Serdang, North Sumatera on January 16th 2017. This research aims to understand Coloumb stress changes of Deli Serdang Earthquake. The analysis of Coloumb stress changes has done to indicate the influence of mainshock toward aftershocks. Earthquake source mechanisms data obtained from Global Centroid Moment Tensor (GCMT) and German Research Centre for Geosciences (GFZ). The distribution of the mainshock and aftershocks had been relocated using Modified Joint Hypocenter Determination (MJHD) method. We used arrival time of primary and secondary wave phase to relocate the hypocenter. The data obtained from the Indonesian Agency for Meteorology Climatology and Geophysics (BMKG) in the period from

Coulomb Stress Change of the 2004 Aceh Earthquake on Mount Sorik Marapi 2021

“…For the average value of coulomb stress changes, Sorik Marapi in 2017 has an average value of coulomb stress changes that are different from the Deli Serdang [33] and Poso [34]. The average value of Sorik Marapi's coulomb stress change in 2017 was 0.131 bar.…”

“…The average value of Sorik Marapi's coulomb stress change in 2017 was 0.131 bar. Meanwhile, the average value of the change in coulomb stress in Deli Serdang was 0.1-0.5 bar [33]. This is because the value of changes in coulomb stress in Deli Serdang is still not averaged with shear or normal values.…”

Analysis of Coulomb Stress Changes in Aceh Earthquake on Sibayak Volcano

“…The change in coulomb stress on Sibayak Volcano is dominated from the west to the south, as shown in Figure 2. The coulomb stress value in this area has also included the calculation from the Deli Serdang earthquake on January 16 2017 (Setiadi et al, 2017). Apart from Sumatra, especially Aceh and North Sumatra, coulomb stress studies have also been carried out in Poso, Sulawesi.…”

Study of Coulomb Stress Change (CSC) Earthquake in the Segment Area of West Seram – Ambon Island

“…Earthquakes themselves occur due to the release of rock stress. So that when the elastic limit of the rock is exceeded, there is a release of energy because the rock is no longer able to withstand stress (Setiadi et al, 2017).…”