Analisis perubahan Coulomb stress gempa bumi Mw 5,8 kabupaten Tapanuli Utara 1 Oktober 2022

Abstrak

An earthquake with a magnitude of Mw 5.8 rocked the North Tapanuli region on October 1 2022 (02:28:43 WIB) in the Renun segment caused by (right-lateral strike slip). The main earthquake data and the parameters of the source mechanism were obtained from Global CMT and aftershock data were obtained from the BMKG catalog with a range of study locations at 1.60⁰ – 2.52⁰ North Latitude and 98.55⁰ East Longitude – 99.50⁰ East Longitude. The method used is the Coulomb Stress method using Coulomb 3.4 software. The results of the analysis of changes in coulomb stress are areas where there is an increase in stress of 0 to 0.2 bar and a decrease in stress of 0 to -0.2 bar. Areas that have increased stress are in the southwest, southeast, northwest and northeast. While the areas that experienced a decrease in stress were in the east, north, west and south.