ANALYSIS OF SURFACE DEFORMATION USING DIFFERENTIAL INTERFEROMETRY SYNTHETIC APERTURE RADAR (DINSAR) AND COULOMB STRESS DISTRIBUTION POST MAMUJU EARTHQUAKE 2021
There was a mainshock with a magnitude of 6.2 Mw in the Mamuju area on January 14, 2021, at 18.28 WITA, this earthquake was preceded by an initial earthquake (foreshock) with a magnitude of 5.9 Mw on the same day at 06.35. and continued with 24 aftershocks until January 20th, 2021.The difficulty of...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/63215 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | There was a mainshock with a magnitude of 6.2 Mw in the Mamuju area on January 14, 2021, at 18.28 WITA, this earthquake was preceded by an initial earthquake (foreshock) with a magnitude of 5.9 Mw on the same day at 06.35. and continued with 24 aftershocks until January 20th, 2021.The difficulty of accessing limited geospatial information is a problem in this study, for example which areas or points experience an increase in Coulomb stress, so this study uses the Coulomb stress distribution method based on the focal mechanism model issued by BMKG, USGS and Gunawan (2021). After that, the aftershock point that has been relocated is plotted on the Coulomb stress distribution for each fault model. The BMKG fault plane 1 and Gunawan fault plane models have a focal mechanism that is closest to the actual model. Furthermore, the processing of the DInSAR method produces a map of post-earthquake ground changes, the Mamuju city area experienced an uplift, while the southern area, namely Majene district, experienced a subsidence, so it is known that the Mamuju earthquake mechanism is a reverse fault, there are at least three new faults from processing the DInSAR method. The Coulomb stress distribution map and fault pattern resulting from the DInSAR method from this study can be used as a guide for disaster mitigation in the Mamuju 2021 area. |
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