This research aims to Identifed the distribution coulomb stress changed that can be used to seesthe subsequent earthquake that occurs within a short distanceand time span. This research uses earthquake data on 2 August 2019 with Mw 6.9 in Tugu Hilir, Indonesia, at 104.825°E and 7.267°S, with 52.8 km depth (USGS). The focus mechanism (strike, dip, rake) is (201°, 49°, 54°). This data prosessed by using Coulomb 3.3 software in MATLAB. The result found that this main earthquake had an increase coulomb stress changed (? 1.0 bar) in the northeast-southwest and was a subsequent earthquake area. Whereas the area of decrese of coulomb stress changed (? -1.0 bar) in the northwest-southeast.
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Author Name: Umbu Harti Mala, Juliany Ningsih Mohamad, Bernandus Bernandus, Valentinus G. V. Putra
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Keywords: earthquake, coulomb stress changed, coulomb 3.3, USGS, Tugu Hilir